/* ================================================================
   MUTMAEN LEARNING — plugin design system (.mtl / .mtl-* / --mtl-*)
   Shares the approved Mutmaen Account language: same tokens, radii,
   lobe corner, orbit line, glass surfaces, breathing motion, buttons.
   Lives only inside the theme's content area (no header/footer).
   Responsive by container width, so it adapts to any theme column.
   ================================================================ */
.mtl{
  --mtl-primary:var(--e-global-color-primary,#27547E);
  --mtl-ink:#2B5071;
  --mtl-teal:var(--e-global-color-85bbd9b,#21B7B1);
  --mtl-teal-deep:var(--e-global-color-ceb3764,#228D99);
  --mtl-teal-soft:#4AB8B5;
  --mtl-aqua:var(--e-global-color-d02d335,#C9F6F8);
  --mtl-mist:#F6FBFB; --mtl-mist-2:#ECFAF9; --mtl-sky:#F0F7FB;
  --mtl-white:#FFFFFF;
  --mtl-text:#69727D; --mtl-text-soft:#7F808D; --mtl-placeholder:#8D9AA4;
  --mtl-value:#1F3A52;
  --mtl-line:#DFE6E6; --mtl-line-soft:#EEF3F3; --mtl-line-strong:#C6D4D6; --mtl-disabled:#F2F5F5; --mtl-muted-icon:#93A2AC;
  --mtl-danger:#C8463F; --mtl-danger-bg:#FDF4F3; --mtl-warn:#D9A70F;
  --mtl-font:var(--e-global-typography-text-font-family,"Tajawal"),"Tajawal","Segoe UI",Tahoma,sans-serif;
  --mtl-r-xs:10px; --mtl-r-sm:14px; --mtl-r-md:20px; --mtl-r-lg:24px; --mtl-r-pill:100px; --mtl-r-lobe:200px;
  --mtl-shadow:0 8px 24px 10px rgba(31,45,45,.08);
  --mtl-shadow-soft:0 0 32px -16px rgba(40,83,123,.12),0 2px 6px rgba(31,45,45,.04);
  --mtl-shadow-lift:0 30px 50px -28px rgba(31,58,82,.35),0 4px 12px rgba(31,45,45,.05);
  --mtl-glass:rgba(255,255,255,.80); --mtl-glass-line:rgba(255,255,255,.78); --mtl-blur:18px;
  --mtl-ring:0 0 0 4px rgba(33,183,177,.16);
  --mtl-ease:cubic-bezier(.22,.8,.24,1); --mtl-ease-breath:cubic-bezier(.45,0,.55,1);
  --mtl-t-fast:.18s; --mtl-t:.32s; --mtl-breath:8s;
  --mtl-sticky:var(--mtl-sticky-offset,0px);
  container:mtl / inline-size;
  position:relative;
  direction:rtl;
  font-family:var(--mtl-font);
  font-size:16px;
  line-height:1.5;
  color:var(--mtl-text);
  -webkit-font-smoothing:antialiased;
  text-align:start;
}
/* fixed-position layers (sheet, modal, toast, bars) live outside the container */
.mtl--layer{container-type:normal;position:static}
.mtl *,.mtl *::before,.mtl *::after{box-sizing:border-box}
.mtl :where(h1,h2,h3,h4,p,ul,ol,figure,dl,dd){margin:0;padding:0}
.mtl :where(ul,ol){list-style:none}
.mtl :where(button){font-family:inherit}
.mtl img{max-width:100%;display:block}
.mtl[hidden],.mtl [hidden]{display:none !important}
.mtl .mtl-i{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mtl .mtl-i--flip{scale:-1 1}
.mtl .mtl-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.mtl a{color:var(--mtl-teal-deep)}
.mtl :focus-visible{outline:2px solid var(--mtl-teal);outline-offset:3px;border-radius:6px}
.mtl bdi{unicode-bidi:isolate}

/* ---------- page band + breathing atmosphere (same as Account) ---------- */
.mtl-page{position:relative;background:var(--mtl-mist);overflow:hidden;overflow:clip;padding-block:48px 96px}
.mtl-container{position:relative;z-index:1;max-width:1300px;margin-inline:auto;padding-inline:24px}
.mtl-atmos{position:absolute;inset:0;pointer-events:none;z-index:0}
.mtl-atmos i{position:absolute;border-radius:50%;translate:calc(var(--mx,0) * 22px) calc(var(--my,0) * 16px);animation:mtl-breathe 16s var(--mtl-ease-breath) infinite alternate}
.mtl-atmos i:nth-child(1){width:760px;height:760px;top:-320px;inset-inline-start:-240px;background:radial-gradient(closest-side,rgba(201,246,248,.95),rgba(201,246,248,0))}
.mtl-atmos i:nth-child(2){width:680px;height:680px;top:900px;inset-inline-end:-260px;background:radial-gradient(closest-side,rgba(33,183,177,.11),rgba(33,183,177,0));animation-delay:-6s}
.mtl-atmos i:nth-child(3){width:620px;height:620px;top:1800px;inset-inline-start:-200px;background:radial-gradient(closest-side,rgba(39,84,126,.06),rgba(39,84,126,0));animation-duration:20s;animation-delay:-3s}
@keyframes mtl-breathe{from{scale:.9}to{scale:1.08}}
@container mtl (max-width:639px){.mtl-container{padding-inline:16px}.mtl-page{padding-block:20px 72px}}

/* reveal on scroll (resting state is visible; JS adds .mtl-js to opt in) */
.mtl-js [data-reveal]{opacity:0;translate:0 18px;transition:opacity .8s var(--mtl-ease),translate .9s var(--mtl-ease);transition-delay:var(--d,0s)}
.mtl-js [data-reveal].is-in{opacity:1;translate:0 0}
.mtl-js [data-reveal="image"]{opacity:1;translate:none;clip-path:inset(0 0 100% 0 round var(--mtl-r-lg));transition:clip-path 1.2s var(--mtl-ease);transition-delay:var(--d,0s)}
.mtl-js [data-reveal="image"].is-in{clip-path:inset(0 0 0 0 round 0)}
.mtl-js [data-reveal="image"] img{scale:1.12;transition:scale 1.6s var(--mtl-ease)}
.mtl-js [data-reveal="image"].is-in img{scale:1}

/* ---------- type ---------- */
.mtl-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.95rem;font-weight:700;color:var(--mtl-teal-soft);line-height:1.2}
.mtl-eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--mtl-teal);box-shadow:0 0 0 4px rgba(33,183,177,.14)}
.mtl .mtl-h2{font-size:1.75rem;font-weight:700;line-height:1.3;color:var(--mtl-primary);letter-spacing:0;text-wrap:balance}
.mtl .mtl-h3{font-size:1.15rem;font-weight:700;line-height:1.4;color:var(--mtl-value)}
.mtl-muted{color:var(--mtl-text)}
@container mtl (max-width:639px){.mtl .mtl-h2{font-size:1.4rem}}

/* ---------- buttons (identical behaviour to .mta-btn) ---------- */
.mtl .mtl-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:10px;height:56px;margin:0;padding:0 28px;border:0;border-radius:var(--mtl-r-pill);font-family:var(--mtl-font);font-size:1.05rem;font-weight:700;line-height:1;text-decoration:none;white-space:nowrap;cursor:pointer;overflow:hidden;isolation:isolate;transition:background var(--mtl-t),color var(--mtl-t),box-shadow var(--mtl-t),border-color var(--mtl-t),scale .2s var(--mtl-ease),opacity var(--mtl-t)}
.mtl .mtl-btn--primary{background:var(--mtl-teal);color:#fff;box-shadow:0 12px 24px -14px rgba(33,183,177,.9)}
.mtl .mtl-btn--primary:hover{background:var(--mtl-teal-deep);color:#fff;box-shadow:0 14px 28px -14px rgba(34,141,153,.9)}
.mtl .mtl-btn--primary::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(100deg,rgba(255,255,255,0) 30%,rgba(255,255,255,.28) 50%,rgba(255,255,255,0) 70%);translate:110% 0;transition:translate .8s var(--mtl-ease)}
.mtl .mtl-btn--primary:hover::before,.mtl .mtl-btn--primary.is-shine::before{translate:-110% 0}
.mtl .mtl-btn:active{scale:.985}
.mtl .mtl-btn:focus-visible{outline:2px solid var(--mtl-primary);outline-offset:3px;border-radius:var(--mtl-r-pill)}
.mtl .mtl-btn--block{width:100%}
.mtl .mtl-btn--ghost{background:var(--mtl-white);color:var(--mtl-primary);border:1.5px solid var(--mtl-line);box-shadow:none}
.mtl .mtl-btn--ghost:hover{color:var(--mtl-teal-deep);border-color:var(--mtl-teal)}
.mtl .mtl-btn--soft{background:var(--mtl-mist-2);color:var(--mtl-teal-deep)}
.mtl .mtl-btn--soft:hover{background:#DDF4F2}
.mtl .mtl-btn--sm{height:40px;padding:0 18px;font-size:.92rem;gap:8px}
.mtl .mtl-btn--sm .mtl-i{width:18px;height:18px}
.mtl .mtl-btn--md{height:48px;padding:0 22px;font-size:1rem}
.mtl .mtl-btn--icon{width:48px;padding:0}
.mtl-btn__label,.mtl-btn__icon{transition:opacity .2s,translate var(--mtl-t) var(--mtl-ease)}
.mtl .mtl-btn:hover .mtl-btn__icon--go{translate:-4px 0}
.mtl .mtl-btn:hover .mtl-btn__icon--back{translate:4px 0}
.mtl-btn__spinner,.mtl-btn__done{position:absolute;inset:0;margin:auto;opacity:0;pointer-events:none}
.mtl-btn__spinner{width:22px;height:22px;border-radius:50%;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;animation:mtl-spin .8s linear infinite}
.mtl-btn__done{width:26px;height:26px;fill:none;stroke:#fff;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:24;stroke-dashoffset:24}
@keyframes mtl-spin{to{rotate:360deg}}
.mtl .mtl-btn.is-loading{cursor:progress;background:var(--mtl-teal);animation:mtl-pulse 1.6s var(--mtl-ease-breath) infinite}
.mtl .mtl-btn.is-loading :is(.mtl-btn__label,.mtl-btn__icon),.mtl .mtl-btn.is-done :is(.mtl-btn__label,.mtl-btn__icon){opacity:0;translate:0 6px}
.mtl .mtl-btn.is-loading .mtl-btn__spinner{opacity:1}
.mtl .mtl-btn.is-done{background:var(--mtl-teal-deep)}
.mtl .mtl-btn.is-done .mtl-btn__done{opacity:1;stroke-dashoffset:0;transition:stroke-dashoffset .45s var(--mtl-ease) .05s}
@keyframes mtl-pulse{0%,100%{box-shadow:0 12px 24px -14px rgba(33,183,177,.9),0 0 0 0 rgba(33,183,177,.25)}50%{box-shadow:0 12px 24px -14px rgba(33,183,177,.9),0 0 0 8px rgba(33,183,177,0)}}
.mtl .mtl-btn:disabled,.mtl .mtl-btn.is-disabled{background:#D3E2E3;color:#fff;box-shadow:none;cursor:not-allowed;scale:1}
.mtl .mtl-btn--ghost:disabled{background:var(--mtl-disabled);color:#A9B5BB;border-color:#E5EBEB}
/* locked "next" — still clickable, explains itself */
.mtl .mtl-btn.is-locked{background:var(--mtl-white);color:var(--mtl-text);border:1.5px dashed var(--mtl-line-strong);box-shadow:none}
.mtl .mtl-btn.is-locked:hover{border-color:var(--mtl-teal-soft);color:var(--mtl-ink)}
.mtl .mtl-btn.is-locked::before{display:none}
.mtl .mtl-btn.is-unlocking{animation:mtl-unlock 1s var(--mtl-ease)}
@keyframes mtl-unlock{0%{scale:.96}40%{scale:1.03}100%{scale:1}}

.mtl .mtl-link{color:var(--mtl-teal-deep);font-weight:700;text-decoration:none;background:linear-gradient(currentColor,currentColor) no-repeat 100% 100% / 0 1.5px;padding-bottom:2px;transition:background-size var(--mtl-t) var(--mtl-ease),color var(--mtl-t-fast);cursor:pointer;border:0;font:inherit;font-weight:700;background-color:transparent}
.mtl .mtl-link:hover{color:var(--mtl-primary);background-size:100% 1.5px}

/* chips (status + filters) */
.mtl .mtl-chip{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--mtl-r-pill);font-size:.78rem;font-weight:700;line-height:1;white-space:nowrap}
.mtl .mtl-chip .mtl-i{width:14px;height:14px}
.mtl .mtl-chip--ok{background:var(--mtl-mist-2);color:var(--mtl-teal-deep)}
.mtl .mtl-chip--info{background:var(--mtl-sky);color:var(--mtl-primary)}
.mtl .mtl-chip--muted{background:#F1F4F5;color:var(--mtl-text)}
.mtl .mtl-chip--glass{background:rgba(255,255,255,.72);color:var(--mtl-primary);backdrop-filter:blur(10px) saturate(150%);-webkit-backdrop-filter:blur(10px) saturate(150%);box-shadow:0 4px 14px -6px rgba(31,58,82,.3)}
.mtl .mtl-pill{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;border-radius:var(--mtl-r-pill);border:1.5px solid var(--mtl-line);background:var(--mtl-white);color:var(--mtl-value);font-size:.92rem;font-weight:500;cursor:pointer;transition:border-color var(--mtl-t-fast),background var(--mtl-t-fast),color var(--mtl-t-fast),scale .2s var(--mtl-ease)}
.mtl .mtl-pill:hover{border-color:var(--mtl-teal)}
.mtl .mtl-pill[aria-pressed="true"]{background:var(--mtl-mist-2);border-color:var(--mtl-teal);color:var(--mtl-teal-deep);font-weight:700}
.mtl .mtl-pill:active{scale:.97}
.mtl .mtl-pill .mtl-i{width:16px;height:16px}

/* progress bar (fills from the right, RTL) */
.mtl-progress{position:relative;height:6px;border-radius:6px;background:#E4ECEC;overflow:hidden}
.mtl-progress__fill{position:absolute;inset-block:0;inset-inline-start:0;width:calc(var(--p,0) * 100%);border-radius:inherit;background:linear-gradient(270deg,var(--mtl-teal-soft),var(--mtl-teal-deep));transition:width 1s var(--mtl-ease)}
.mtl-progress--thin{height:4px}

/* avatar */
.mtl-avatar{flex:none;width:32px;height:32px;border-radius:50%;overflow:hidden;background:var(--mtl-mist-2);box-shadow:0 0 0 2px var(--mtl-white)}
.mtl-avatar img{width:100%;height:100%;object-fit:cover}

/* the shared art-directed frame: lobe corner + orbit outline */
.mtl-frame{position:relative;isolation:isolate}
.mtl-frame__clip{position:absolute;inset:0;overflow:hidden;border-radius:var(--mtl-r-lg);border-top-left-radius:var(--mtl-lobe,var(--mtl-r-lobe));background:#BFDCE2;z-index:1;-webkit-mask-image:-webkit-radial-gradient(white,black);mask-image:radial-gradient(white,black)}
.mtl-frame__media{position:absolute;inset:-28px;translate:calc(var(--mx,0) * -10px) calc(var(--my,0) * -8px + var(--sy,0) * 1px);will-change:translate}
.mtl-frame__media img{width:100%;height:100%;object-fit:cover;scale:var(--crop,1);transition:scale .2s linear}
.mtl-frame__tint{position:absolute;inset:0;background:linear-gradient(200deg,rgba(39,84,126,0) 45%,rgba(39,84,126,.30)),linear-gradient(0deg,rgba(33,183,177,.10),rgba(33,183,177,0) 40%);pointer-events:none}
.mtl-frame__light{position:absolute;inset:-20%;background:radial-gradient(40% 36% at 30% 26%,rgba(255,248,232,.42),rgba(255,248,232,0) 70%);mix-blend-mode:soft-light;animation:mtl-light 18s var(--mtl-ease-breath) infinite alternate;pointer-events:none}
@keyframes mtl-light{from{translate:-6% -3%}to{translate:8% 5%}}
.mtl-frame__orbit{position:absolute;inset:0;border:1.5px solid rgba(33,183,177,.32);border-radius:var(--mtl-r-lg);border-top-left-radius:var(--mtl-lobe,var(--mtl-r-lobe));translate:calc(-18px + var(--mx,0) * 6px) calc(-18px + var(--my,0) * 5px);z-index:0;pointer-events:none}
.mtl-dot{position:absolute;width:16px;height:16px;border-radius:50%;background:var(--mtl-teal);box-shadow:0 0 0 8px rgba(33,183,177,.12);z-index:3;translate:calc(var(--mx,0) * 12px) calc(var(--my,0) * 10px);animation:mtl-float 7s var(--mtl-ease-breath) infinite alternate}
@keyframes mtl-float{from{transform:translateY(-4px)}to{transform:translateY(6px)}}
/* breathing pill — the Mutmaen signature */
.mtl-breath{position:absolute;z-index:4;display:flex;align-items:center;gap:12px;padding-block:10px;padding-inline:12px 18px;border-radius:var(--mtl-r-pill);background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.45);backdrop-filter:blur(12px) saturate(140%);-webkit-backdrop-filter:blur(12px) saturate(140%);color:#fff;font-size:.9rem;font-weight:500}
.mtl-breath__ring{position:relative;width:28px;height:28px;border-radius:50%;border:1.5px solid rgba(255,255,255,.7);display:grid;place-items:center}
.mtl-breath__ring::after{content:"";width:16px;height:16px;border-radius:50%;background:rgba(255,255,255,.9);animation:mtl-inhale var(--mtl-breath) var(--mtl-ease-breath) infinite}
@keyframes mtl-inhale{0%,100%{scale:.45}50%{scale:1.15}}
.mtl-breath__word{display:grid}
.mtl-breath__word b{grid-area:1/1;font-weight:500;animation:mtl-word var(--mtl-breath) linear infinite}
.mtl-breath__word b+b{animation-delay:calc(var(--mtl-breath) / -2)}
@keyframes mtl-word{0%,44%{opacity:1}50%,94%{opacity:0}100%{opacity:1}}

/* ================================================================
   1) CATALOG — hero
   ================================================================ */
.mtl-hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr);gap:0}
.mtl-hero__text{position:relative;z-index:3;display:grid;align-content:center;gap:0;min-width:0}
.mtl .mtl-hero__title{margin-top:18px;font-size:clamp(2.6rem,1.2rem + 3.6vw,4.4rem);font-weight:800;line-height:1.12;color:var(--mtl-primary);letter-spacing:0;text-wrap:balance}
.mtl-hero__title span{display:block;color:var(--mtl-teal-deep)}
.mtl .mtl-hero__lead{margin-top:18px;max-width:40ch;font-size:1.12rem;line-height:1.8;color:var(--mtl-text);text-wrap:pretty}
.mtl-hero__visual{position:relative;min-width:0}
.mtl-hero__cta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:32px}
.mtl-hero__cta .mtl-btn__icon{transition:translate var(--mtl-t) var(--mtl-ease)}
.mtl-hero__cta .mtl-btn:hover .mtl-btn__icon{translate:0 3px}
.mtl-hero__count{font-size:.95rem;color:var(--mtl-text)}
.mtl-hero__main{position:absolute;inset:0}
.mtl-hero__inset{position:absolute;z-index:3;inset-block-end:-36px;inset-inline-start:-56px;width:34%;aspect-ratio:4/5;border-radius:var(--mtl-r-lg);border-top-right-radius:96px;overflow:hidden;box-shadow:0 0 0 7px var(--mtl-mist),var(--mtl-shadow-lift);translate:calc(var(--mx,0) * -16px) calc(var(--my,0) * -12px + var(--sy,0) * -1.6px);will-change:translate}
.mtl-hero__inset img,.mtl-hero__round img{width:100%;height:100%;object-fit:cover;scale:1.08}
.mtl-hero__round{position:absolute;z-index:3;inset-block-start:16%;inset-inline-end:-44px;width:132px;aspect-ratio:1;border-radius:50%;overflow:hidden;box-shadow:0 0 0 7px var(--mtl-mist),var(--mtl-shadow-lift);translate:calc(var(--mx,0) * 18px) calc(var(--my,0) * 14px + var(--sy,0) * 1.2px);will-change:translate}
.mtl-hero__visual .mtl-breath{inset-block-end:28px;inset-inline-end:28px;translate:calc(var(--mx,0) * 6px) calc(var(--my,0) * 5px)}
.mtl-hero__visual .mtl-dot{inset-block-start:-30px;inset-inline-start:22%}

@container mtl (min-width:880px){
  .mtl-hero{grid-template-columns:minmax(0,44fr) minmax(0,56fr);min-height:620px;align-items:stretch}
  .mtl-hero__text{padding-block:40px 64px;padding-inline-end:48px}
  .mtl-hero__visual{margin-block:8px 36px}
}
@container mtl (max-width:879px){
  .mtl-hero__visual{order:-1;height:clamp(240px,40svh,360px);margin-inline:6px}
  .mtl-hero__main{--mtl-lobe:120px}
  .mtl-hero__main .mtl-frame__orbit{translate:-10px -10px}
  .mtl-hero__inset{width:30%;inset-block-end:-28px;inset-inline-start:14px;border-top-right-radius:56px;box-shadow:0 0 0 5px var(--mtl-mist),var(--mtl-shadow-lift)}
  .mtl-hero__round{display:none}
  .mtl-hero__visual .mtl-breath{inset-block-start:16px;inset-block-end:auto;inset-inline-start:16px;inset-inline-end:auto;gap:9px;padding-block:7px;padding-inline:9px 14px;font-size:.82rem;backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,.22)}
  .mtl-hero__visual .mtl-breath__ring{width:22px;height:22px}
  .mtl-hero__visual .mtl-breath__ring::after{width:12px;height:12px}
  .mtl-hero__visual .mtl-dot{inset-block-start:-14px;inset-inline-start:auto;inset-inline-end:10px;width:12px;height:12px}
  .mtl-hero__text{padding-block:56px 8px}
  .mtl .mtl-hero__lead{font-size:1.02rem;margin-top:12px}
}

/* search */
.mtl-search{position:relative;margin-top:34px;max-width:520px}
.mtl-search__box{position:relative;display:flex;align-items:center;height:64px;background:var(--mtl-glass);border:1.5px solid var(--mtl-white);border-radius:var(--mtl-r-pill);box-shadow:0 18px 40px -22px rgba(31,58,82,.4),inset 0 1px 0 #fff;backdrop-filter:blur(var(--mtl-blur)) saturate(150%);-webkit-backdrop-filter:blur(var(--mtl-blur)) saturate(150%);transition:border-color var(--mtl-t-fast),box-shadow var(--mtl-t),background var(--mtl-t)}
.mtl-search__box:hover{border-color:var(--mtl-line-strong)}
.mtl-search__box:focus-within{border-color:var(--mtl-teal);background:var(--mtl-white);box-shadow:var(--mtl-ring),0 18px 40px -22px rgba(31,58,82,.4)}
.mtl-search__icon{position:absolute;inset-inline-start:22px;color:var(--mtl-muted-icon);pointer-events:none;transition:color var(--mtl-t-fast),scale var(--mtl-t) var(--mtl-ease)}
.mtl-search__box:focus-within .mtl-search__icon{color:var(--mtl-teal);scale:1.06}
.mtl .mtl-search__input{appearance:none;-webkit-appearance:none;width:100%;height:100%;margin:0;border:0;outline:0;background:transparent;border-radius:inherit;padding-inline:56px 64px;font-family:var(--mtl-font);font-size:1.05rem;color:var(--mtl-value);caret-color:var(--mtl-teal);text-align:start}
.mtl .mtl-search__input::placeholder{color:var(--mtl-placeholder);opacity:1}
.mtl .mtl-search__input::-webkit-search-cancel-button{display:none}
.mtl .mtl-search__input:focus-visible{outline:0}
.mtl .mtl-search__clear{position:absolute;inset-inline-end:12px;width:40px;height:40px;border-radius:50%;border:0;background:var(--mtl-mist-2);color:var(--mtl-ink);display:grid;place-items:center;cursor:pointer;opacity:0;scale:.6;pointer-events:none;transition:opacity var(--mtl-t),scale var(--mtl-t) var(--mtl-ease),background var(--mtl-t-fast)}
.mtl .mtl-search__clear:hover{background:#DDF4F2}
.mtl-search.has-value .mtl-search__clear{opacity:1;scale:1;pointer-events:auto}
.mtl-search__busy{position:absolute;inset-inline-end:62px;width:18px;height:18px;border-radius:50%;border:2px solid rgba(33,183,177,.25);border-top-color:var(--mtl-teal);animation:mtl-spin .8s linear infinite;opacity:0;transition:opacity .2s}
.mtl-search.is-busy .mtl-search__busy{opacity:1}
.mtl-suggest{display:flex;flex-wrap:wrap;align-items:center;gap:8px 6px;margin-top:16px;font-size:.92rem}
.mtl-suggest__label{color:var(--mtl-text);margin-inline-end:4px}
.mtl .mtl-suggest button{border:0;background:none;padding:4px 8px;border-radius:var(--mtl-r-pill);font:inherit;font-weight:500;color:var(--mtl-ink);cursor:pointer;transition:background var(--mtl-t-fast),color var(--mtl-t-fast)}
.mtl .mtl-suggest button:hover{background:var(--mtl-white);color:var(--mtl-teal-deep)}
@container mtl (max-width:639px){
  .mtl-search{margin-top:24px}
  .mtl-search__box{height:58px;background:var(--mtl-white);backdrop-filter:none;-webkit-backdrop-filter:none;border-color:var(--mtl-line)}
  .mtl .mtl-search__input{font-size:1rem;padding-inline:50px 58px}
  .mtl-search__icon{inset-inline-start:18px}
}

/* continue learning strip */
.mtl-resume{margin-top:56px;display:grid;gap:14px}
.mtl-resume__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.mtl-resume__list{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,420px),1fr));gap:16px}
.mtl .mtl-resume__item{position:relative;display:flex;align-items:center;gap:16px;padding:12px;padding-inline-end:20px;border-radius:var(--mtl-r-lg);background:var(--mtl-glass);border:1px solid var(--mtl-glass-line);backdrop-filter:blur(var(--mtl-blur)) saturate(150%);-webkit-backdrop-filter:blur(var(--mtl-blur)) saturate(150%);box-shadow:var(--mtl-shadow-soft);text-decoration:none;color:inherit;transition:box-shadow var(--mtl-t),translate var(--mtl-t) var(--mtl-ease),border-color var(--mtl-t)}
.mtl .mtl-resume__item:hover{translate:0 -2px;box-shadow:var(--mtl-shadow-lift);border-color:var(--mtl-white)}
.mtl-resume__thumb{flex:none;width:84px;height:84px;border-radius:18px;border-top-left-radius:40px;overflow:hidden}
.mtl-resume__thumb img{width:100%;height:100%;object-fit:cover}
.mtl-resume__body{flex:1;min-width:0;display:grid;gap:6px}
.mtl-resume__title{font-weight:700;color:var(--mtl-value);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mtl-resume__next{font-size:.88rem;color:var(--mtl-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mtl-resume__next b{color:var(--mtl-ink);font-weight:500}
.mtl-resume__bar{display:flex;align-items:center;gap:10px;font-size:.82rem;font-weight:700;color:var(--mtl-teal-deep)}
.mtl-resume__bar .mtl-progress{flex:1}
.mtl-resume__go{flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-teal);color:#fff;box-shadow:0 10px 20px -12px rgba(33,183,177,.9);transition:background var(--mtl-t),translate var(--mtl-t) var(--mtl-ease)}
.mtl-resume__item:hover .mtl-resume__go{background:var(--mtl-teal-deep);translate:-3px 0}
@container mtl (max-width:639px){
  .mtl-resume{margin-top:36px}
  .mtl-resume__list{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;margin-inline:-16px;padding-inline:16px;padding-block:4px 10px}
  .mtl-resume__list::-webkit-scrollbar{display:none}
  .mtl .mtl-resume__item{flex:0 0 86%;scroll-snap-align:start;background:var(--mtl-white);backdrop-filter:none;-webkit-backdrop-filter:none;border-color:var(--mtl-line)}
  .mtl-resume__thumb{width:64px;height:64px;border-radius:14px;border-top-left-radius:30px}
  .mtl-resume__go{width:38px;height:38px}
}

/* ---------- catalog toolbar ---------- */
.mtl-courses{margin-top:72px;scroll-margin-top:calc(var(--mtl-sticky) + 16px)}
.mtl-courses__head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}
.mtl-courses__count{font-size:.95rem;color:var(--mtl-text);transition:opacity .2s}
.mtl-toolbar{position:relative;display:flex;align-items:center;gap:12px;margin-top:22px}
.mtl-toolbar .mtl-search{margin:0;margin-inline-start:auto;flex:0 1 360px;max-width:none}
.mtl-toolbar .mtl-search__box{height:54px;background:var(--mtl-white);backdrop-filter:none;-webkit-backdrop-filter:none;border:1px solid var(--mtl-line);box-shadow:var(--mtl-shadow-soft)}
.mtl-toolbar .mtl .mtl-search__input,.mtl-toolbar .mtl-search__input{font-size:1rem;padding-inline:52px 58px}
.mtl-toolbar .mtl-search__icon{inset-inline-start:20px}
.mtl-tabs{position:relative;display:flex;gap:2px;padding:6px;min-width:0;background:var(--mtl-white);border:1px solid var(--mtl-line);border-radius:var(--mtl-r-pill);box-shadow:var(--mtl-shadow-soft);overflow-x:auto;scrollbar-width:none;flex:0 1 auto}
.mtl-tabs::-webkit-scrollbar{display:none}
.mtl-tabs__glide{position:absolute;top:0;left:0;border-radius:var(--mtl-r-pill);background:var(--mtl-mist-2);transition:translate .45s var(--mtl-ease),width .45s var(--mtl-ease),height .45s var(--mtl-ease);z-index:0;pointer-events:none}
.mtl .mtl-tab{position:relative;z-index:1;flex:none;height:42px;padding:0 18px;border:0;border-radius:var(--mtl-r-pill);background:transparent;color:var(--mtl-value);font-size:.98rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:color var(--mtl-t-fast)}
.mtl .mtl-tab:hover{color:var(--mtl-primary)}
.mtl .mtl-tab[aria-selected="true"]{color:var(--mtl-primary);font-weight:700}
.mtl .mtl-tab:focus-visible{outline-offset:-2px;border-radius:var(--mtl-r-pill)}
.mtl-filter{position:relative;flex:none}
.mtl .mtl-filter__btn{height:54px;padding:0 22px;gap:10px;overflow:visible;background:var(--mtl-white);color:var(--mtl-value);border:1px solid var(--mtl-line);box-shadow:var(--mtl-shadow-soft);font-weight:500}
.mtl .mtl-filter__btn:hover,.mtl .mtl-filter__btn[aria-expanded="true"]{border-color:var(--mtl-teal);color:var(--mtl-teal-deep)}
.mtl-filter__count{display:grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border-radius:11px;background:var(--mtl-teal);color:#fff;font-size:.75rem;font-weight:700;scale:0;transition:scale var(--mtl-t) var(--mtl-ease)}
.mtl-filter__count.is-on{scale:1}
.mtl-pop{position:absolute;z-index:20;inset-block-start:calc(100% + 12px);inset-inline-end:0;width:min(380px,calc(100vw - 32px));padding:22px;border-radius:var(--mtl-r-lg);background:rgba(255,255,255,.92);border:1px solid var(--mtl-glass-line);backdrop-filter:blur(var(--mtl-blur)) saturate(160%);-webkit-backdrop-filter:blur(var(--mtl-blur)) saturate(160%);box-shadow:0 30px 60px -30px rgba(31,58,82,.45),var(--mtl-shadow-soft);transform-origin:12% 0;opacity:0;scale:.96;translate:0 -6px;pointer-events:none;visibility:hidden;transition:opacity .25s,scale .35s var(--mtl-ease),translate .35s var(--mtl-ease),visibility 0s .35s}
.mtl-pop.is-open{opacity:1;scale:1;translate:0 0;pointer-events:auto;visibility:visible;transition:opacity .25s,scale .35s var(--mtl-ease),translate .35s var(--mtl-ease),visibility 0s}
.mtl-fgroup+.mtl-fgroup{margin-top:20px}
.mtl-fgroup__title{font-size:.9rem;font-weight:700;color:var(--mtl-ink);margin-bottom:10px}
.mtl-fgroup__opts{display:flex;flex-wrap:wrap;gap:8px}
.mtl-pop__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px;padding-top:16px;border-top:1px solid var(--mtl-line-soft)}
.mtl-switch{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;color:var(--mtl-value);font-weight:500}
.mtl-switch input{position:absolute;opacity:0;width:1px;height:1px}
.mtl-switch__ui{position:relative;flex:none;width:44px;height:26px;border-radius:13px;background:#DCE5E6;transition:background var(--mtl-t)}
.mtl-switch__ui::after{content:"";position:absolute;inset-block-start:3px;inset-inline-start:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(31,45,45,.2);transition:inset-inline-start var(--mtl-t) var(--mtl-ease)}
.mtl-switch input:checked+.mtl-switch__ui{background:var(--mtl-teal)}
.mtl-switch input:checked+.mtl-switch__ui::after{inset-inline-start:21px}
.mtl-switch input:focus-visible+.mtl-switch__ui{box-shadow:var(--mtl-ring)}
.mtl-active{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;min-height:0}
.mtl-active:empty{display:none}
.mtl .mtl-active__chip{display:inline-flex;align-items:center;gap:6px;height:34px;padding-inline:14px 8px;border-radius:var(--mtl-r-pill);background:var(--mtl-white);border:1px solid var(--mtl-line);font-size:.88rem;color:var(--mtl-value);cursor:pointer;animation:mtl-chip-in .35s var(--mtl-ease);transition:border-color var(--mtl-t-fast)}
.mtl .mtl-active__chip:hover{border-color:var(--mtl-teal)}
.mtl .mtl-active__chip .mtl-i{width:16px;height:16px;color:var(--mtl-muted-icon)}
@keyframes mtl-chip-in{from{opacity:0;scale:.9}}
@container mtl (max-width:879px){
  .mtl-courses{margin-top:48px}
  .mtl-toolbar{gap:10px 8px;flex-wrap:wrap}
  .mtl-toolbar .mtl-search{order:1;flex:1 1 0;margin:0}
  .mtl-toolbar .mtl-search__box{height:52px}
  .mtl-filter{order:2}
  .mtl-tabs{order:3;flex:1 1 100%;padding:4px}
  .mtl .mtl-filter__btn{position:relative;width:52px;height:52px;padding:0}
  .mtl .mtl-filter__btn>span:not(.mtl-filter__count){position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .mtl-filter__count{position:absolute;inset-block-start:-4px;inset-inline-end:-4px;box-shadow:0 0 0 3px var(--mtl-mist)}
  .mtl .mtl-tab{height:42px;padding:0 14px;font-size:.92rem}
}

/* ---------- course grid + card ---------- */
.mtl-grid{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:44px 28px;margin-top:34px;transition:opacity .25s}
.mtl-grid.is-busy{opacity:.45}
@container mtl (max-width:1099px){.mtl-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 22px}}
@container mtl (max-width:639px){.mtl-grid{grid-template-columns:minmax(0,1fr);gap:30px;margin-top:24px}}

.mtl-card{position:relative;display:flex;flex-direction:column;min-width:0;border-radius:var(--mtl-r-lg);transition:translate .5s var(--mtl-ease)}
.mtl-card__media{position:relative;aspect-ratio:4/3;isolation:isolate}
.mtl-card__clip{position:absolute;inset:0;z-index:1;border-radius:var(--mtl-r-lg);border-top-left-radius:72px;overflow:hidden;background:#CFE4E8;-webkit-mask-image:-webkit-radial-gradient(white,black);mask-image:radial-gradient(white,black)}
.mtl-card__clip img{width:100%;height:100%;object-fit:cover;transition:scale 1.1s var(--mtl-ease),filter .6s}
.mtl-card__clip::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(31,58,82,0) 55%,rgba(31,58,82,.28));opacity:.6;transition:opacity .6s}
.mtl-card__orbit{position:absolute;inset:0;z-index:0;border:1.5px solid rgba(33,183,177,.35);border-radius:var(--mtl-r-lg);border-top-left-radius:72px;opacity:0;translate:0 0;transition:translate .6s var(--mtl-ease),opacity .4s}
.mtl-card__badge{position:absolute;z-index:2;inset-block-start:14px;inset-inline-start:14px}
.mtl-card__go{position:absolute;z-index:2;inset-block-end:14px;inset-inline-end:14px;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.85);color:var(--mtl-primary);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);opacity:0;scale:.7;translate:8px 0;transition:opacity .35s,scale .45s var(--mtl-ease),translate .45s var(--mtl-ease)}
.mtl-card__body{display:grid;gap:10px;padding:20px 4px 0}
.mtl-card__cat{font-size:.85rem;font-weight:700;color:var(--mtl-teal-soft)}
.mtl-card__cat span{color:var(--mtl-text-soft);font-weight:500}
.mtl .mtl-card__title{font-size:1.22rem;font-weight:700;line-height:1.45;color:var(--mtl-value);text-wrap:balance;transition:color var(--mtl-t-fast)}
.mtl .mtl-card__title a{color:inherit;text-decoration:none}
.mtl .mtl-card__title a::after{content:"";position:absolute;inset:0;z-index:5;border-radius:var(--mtl-r-lg)}
.mtl .mtl-card__title a:focus-visible{outline:0}
.mtl .mtl-card__title a:focus-visible::after{outline:2px solid var(--mtl-teal);outline-offset:6px}
.mtl-card__by{display:flex;align-items:center;gap:10px;font-size:.92rem;color:var(--mtl-text)}
.mtl-card__by .mtl-avatar{width:28px;height:28px}
.mtl-card__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:4px;padding-top:14px;border-top:1px solid var(--mtl-line)}
.mtl-card__meta{display:flex;align-items:center;gap:14px;font-size:.88rem;color:var(--mtl-text)}
.mtl-card__meta span{display:inline-flex;align-items:center;gap:6px}
.mtl-card__meta .mtl-i{width:16px;height:16px;color:var(--mtl-muted-icon)}
.mtl-price{display:inline-flex;align-items:baseline;gap:8px;white-space:nowrap}
.mtl-price b{font-size:1.15rem;font-weight:800;color:var(--mtl-primary)}
.mtl-price small{font-size:.8rem;font-weight:500;color:var(--mtl-text)}
.mtl-price s{font-size:.85rem;color:var(--mtl-text-soft)}
.mtl-price--free b{color:var(--mtl-teal-deep)}
@media (hover:hover) and (pointer:fine){
  .mtl-card:hover{translate:0 -6px}
  .mtl-card:hover .mtl-card__clip img{scale:1.06}
  .mtl-card:hover .mtl-card__clip::after{opacity:1}
  .mtl-card:hover .mtl-card__orbit{opacity:1;translate:-10px -10px}
  .mtl-card:hover .mtl-card__go{opacity:1;scale:1;translate:0 0}
  .mtl-card:hover .mtl-card__title{color:var(--mtl-teal-deep)}
}
.mtl-card:focus-within .mtl-card__orbit{opacity:1;translate:-10px -10px}

/* featured: spans two columns on wide screens, horizontal composition */
@container mtl (min-width:880px){
  .mtl-card--feature{grid-column:1/-1;flex-direction:row;align-items:center;gap:56px}
  .mtl-card--feature .mtl-card__media{flex:0 0 60%;aspect-ratio:16/9}
  .mtl-card--feature .mtl-card__body{max-width:440px}
  .mtl-card--feature .mtl-card__clip,.mtl-card--feature .mtl-card__orbit{border-top-left-radius:140px}
  .mtl-card--feature .mtl-card__body{flex:1;padding:0;gap:14px}
  .mtl .mtl-card--feature .mtl-card__title{font-size:2rem;line-height:1.3}
  .mtl-card__sub{font-size:1rem;line-height:1.7;color:var(--mtl-text)}
}
.mtl-card:not(.mtl-card--feature) .mtl-card__sub{display:none}
@container mtl (max-width:879px){.mtl-card__sub{display:none}}

/* skeleton */
.mtl-skel .mtl-card__clip,.mtl-skel__line{background:linear-gradient(90deg,#E8F0F0 0%,#F4F8F8 40%,#E8F0F0 80%) 0 0/300% 100%;animation:mtl-shimmer 1.6s linear infinite}
.mtl-skel .mtl-card__clip::after{display:none}
.mtl-skel__line{height:14px;border-radius:7px}
.mtl-skel__line--title{height:22px;width:86%}
.mtl-skel__line--short{width:40%}
@keyframes mtl-shimmer{from{background-position:100% 0}to{background-position:-200% 0}}

/* card enter (filter changes) */
.mtl-card.is-entering{animation:mtl-card-in .6s var(--mtl-ease) both;animation-delay:var(--d,0s)}
@keyframes mtl-card-in{from{opacity:0;translate:0 20px;scale:.985}}
.mtl-card.is-leaving{position:absolute;opacity:0;transition:opacity .2s;pointer-events:none}

/* empty / no-results states */
.mtl-state{grid-column:1/-1;display:grid;justify-items:center;text-align:center;gap:10px;padding:48px 16px 24px;animation:mtl-rise .6s var(--mtl-ease)}
.mtl-state__art{position:relative;width:200px;height:150px;margin-bottom:18px}
.mtl-state__art .mtl-frame__clip{border-top-left-radius:90px;background:linear-gradient(160deg,#D9F2F1,#BFDCE2 60%,#A8CBD6)}
.mtl-state__art .mtl-frame__orbit{border-top-left-radius:90px;translate:-12px -12px}
.mtl-state__art .mtl-frame__clip::before{content:"";position:absolute;width:140px;height:140px;border-radius:50%;inset-block-start:-40px;inset-inline-start:-30px;background:radial-gradient(closest-side,rgba(255,255,255,.75),rgba(255,255,255,0));animation:mtl-breathe 8s var(--mtl-ease-breath) infinite alternate}
.mtl-state__icon{position:absolute;z-index:3;inset-block-end:-18px;inset-inline-start:-18px;width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-white);color:var(--mtl-teal-deep);box-shadow:var(--mtl-shadow-lift)}
.mtl-state__icon .mtl-i{width:28px;height:28px}
.mtl .mtl-state__title{font-size:1.4rem;font-weight:700;color:var(--mtl-primary);line-height:1.4}
.mtl .mtl-state__text{max-width:42ch;font-size:1rem;line-height:1.7}
.mtl-state__text q{color:var(--mtl-value);font-weight:700;quotes:"«" "»"}
.mtl-state__actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:14px}
@keyframes mtl-rise{from{opacity:0;translate:0 16px}}

/* ================================================================
   2) COURSE DETAIL
   ================================================================ */
.mtl-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:.9rem;color:var(--mtl-text)}
.mtl .mtl-crumbs a{color:var(--mtl-text);text-decoration:none;transition:color var(--mtl-t-fast)}
.mtl .mtl-crumbs a:hover{color:var(--mtl-teal-deep)}
.mtl-crumbs .mtl-i{width:16px;height:16px;color:var(--mtl-line-strong)}
@container mtl (max-width:639px){.mtl-crumbs [aria-current],.mtl-crumbs .mtl-i:last-of-type{display:none}}
.mtl-crumbs [aria-current]{color:var(--mtl-value);font-weight:500;max-width:32ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.mtl-intro{display:grid;grid-template-columns:minmax(0,1fr);gap:36px;margin-top:28px}
.mtl-intro__info{display:grid;align-content:center;gap:0;min-width:0}
.mtl .mtl-intro__title{margin-top:14px;font-size:clamp(2rem,1.2rem + 2vw,3rem);font-weight:800;line-height:1.2;color:var(--mtl-primary);text-wrap:balance}
.mtl .mtl-intro__sub{margin-top:14px;font-size:1.15rem;line-height:1.7;color:var(--mtl-text);max-width:38ch}
.mtl-by{display:flex;align-items:center;gap:12px;margin-top:22px}
.mtl-by .mtl-avatar{width:46px;height:46px}
.mtl-by__name{font-weight:700;color:var(--mtl-value)}
.mtl .mtl-by__name a{color:inherit;text-decoration:none}
.mtl .mtl-by__name a:hover{color:var(--mtl-teal-deep)}
.mtl-by__role{font-size:.88rem;color:var(--mtl-text)}
.mtl-facts{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:24px;padding-block:18px;border-block:1px solid var(--mtl-line)}
.mtl-facts li{display:flex;align-items:center;gap:10px;font-size:.95rem;color:var(--mtl-value);font-weight:500}
.mtl-facts .mtl-i{color:var(--mtl-teal-deep)}
.mtl-facts small{display:block;font-size:.78rem;color:var(--mtl-text);font-weight:400}
.mtl-buy{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:24px}
.mtl-buy .mtl-price b{font-size:2rem}
.mtl-buy__actions{display:flex;align-items:center;gap:10px;flex:1 1 auto}
.mtl-buy__note{flex-basis:100%;display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px;font-size:.88rem;color:var(--mtl-text)}
.mtl-buy__note span{display:inline-flex;align-items:center;gap:6px}
.mtl-buy__note .mtl-i{width:16px;height:16px;color:var(--mtl-teal-soft)}
.mtl-buy__after{display:inline-flex;align-items:center;gap:6px;font-size:.92rem;animation:mtl-rise .4s var(--mtl-ease)}
.mtl-buy__mine{display:flex;align-items:center;gap:12px;font-size:.9rem;font-weight:700;color:var(--mtl-teal-deep);min-width:180px}
.mtl-buy__mine .mtl-progress{flex:1;min-width:90px}

.mtl-intro__media{position:relative;aspect-ratio:16/11;min-width:0}
.mtl-intro__media .mtl-frame{position:absolute;inset:0}
.mtl-intro__media .mtl-dot{inset-block-start:-30px;inset-inline-end:-30px}
@container mtl (min-width:880px){
  .mtl-intro{grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:64px;align-items:center}
}
@container mtl (max-width:879px){
  .mtl-intro{gap:24px;margin-top:18px}
  .mtl-intro__media{order:-1;margin-inline:6px}
  .mtl-intro__media .mtl-frame{--mtl-lobe:110px}
  .mtl-intro__media .mtl-frame__orbit{translate:-10px -10px}
  .mtl-intro__media .mtl-dot{inset-block-start:-14px;inset-inline-end:-2px;width:12px;height:12px}
  .mtl .mtl-intro__sub{font-size:1.02rem}
  .mtl-facts{gap:12px 20px}
  .mtl-buy .mtl-price b{font-size:1.7rem}
  .mtl-buy__actions{flex-basis:100%}
  .mtl-buy__actions .mtl-btn--primary{flex:1}
}

/* play affordance on a poster */
.mtl .mtl-playbtn{position:absolute;z-index:4;inset:0;margin:auto;width:max-content;height:max-content;display:flex;align-items:center;gap:14px;padding-block:10px;padding-inline:10px 24px;border:1px solid rgba(255,255,255,.55);text-align:start;border-radius:var(--mtl-r-pill);background:rgba(255,255,255,.2);backdrop-filter:blur(14px) saturate(150%);-webkit-backdrop-filter:blur(14px) saturate(150%);color:#fff;font-family:var(--mtl-font);font-size:1rem;font-weight:700;cursor:pointer;transition:background var(--mtl-t),scale .35s var(--mtl-ease),border-color var(--mtl-t)}
.mtl .mtl-playbtn:hover{background:rgba(255,255,255,.3);scale:1.04;border-color:#fff}
.mtl-playbtn__disc{position:relative;width:56px;height:56px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--mtl-primary)}
.mtl-playbtn__disc::before{content:"";position:absolute;inset:-7px;border-radius:50%;border:1.5px solid rgba(255,255,255,.6);animation:mtl-halo var(--mtl-breath) var(--mtl-ease-breath) infinite}
@keyframes mtl-halo{0%,100%{scale:.92;opacity:.35}50%{scale:1.12;opacity:1}}
.mtl-playbtn__disc .mtl-i{width:22px;height:22px;fill:currentColor;stroke:none;translate:-1px 0}
.mtl-playbtn small{display:block;font-size:.8rem;font-weight:500;opacity:.85}

/* in-page section nav */
.mtl-secnav{position:sticky;top:calc(var(--mtl-sticky) + 12px);z-index:8;display:flex;gap:2px;margin-top:72px;padding:6px;width:max-content;max-width:100%;overflow-x:auto;scrollbar-width:none;background:rgba(255,255,255,.86);border:1px solid var(--mtl-line);border-radius:var(--mtl-r-pill);box-shadow:var(--mtl-shadow-soft);backdrop-filter:blur(var(--mtl-blur)) saturate(150%);-webkit-backdrop-filter:blur(var(--mtl-blur)) saturate(150%)}
.mtl-secnav::-webkit-scrollbar{display:none}
.mtl .mtl-secnav a{position:relative;z-index:1;flex:none;display:grid;place-items:center;height:40px;padding:0 16px;border-radius:var(--mtl-r-pill);color:var(--mtl-value);font-size:.95rem;font-weight:500;text-decoration:none;white-space:nowrap;transition:color var(--mtl-t-fast)}
.mtl .mtl-secnav a[aria-current="true"]{color:var(--mtl-primary);font-weight:700}
@container mtl (max-width:879px){.mtl-secnav{position:relative;top:auto;margin-top:44px;margin-inline:-16px;width:auto;border-radius:0;border-inline:0;background:transparent;box-shadow:none;border-color:transparent;padding-inline:10px;backdrop-filter:none;-webkit-backdrop-filter:none}}

.mtl-detail{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;margin-top:40px}
@container mtl (min-width:1100px){.mtl-detail{grid-template-columns:minmax(0,1fr) 340px;gap:72px;align-items:start}}
.mtl-detail__main{display:grid;gap:80px;min-width:0}
.mtl-sec{scroll-margin-top:calc(var(--mtl-sticky) + 90px)}
.mtl-sec__head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px 20px;flex-wrap:wrap;margin-bottom:24px}
.mtl-sec__meta{font-size:.95rem;color:var(--mtl-text)}
@container mtl (max-width:639px){.mtl-detail__main{gap:56px}.mtl-detail{margin-top:24px}}

.mtl-about{display:grid;gap:16px;max-width:64ch}
.mtl .mtl-about p{font-size:1.05rem;line-height:1.95;color:var(--mtl-text)}
.mtl .mtl-about p:first-child{font-size:1.3rem;line-height:1.8;color:var(--mtl-value);font-weight:500}

.mtl-learn-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 40px}
.mtl-learn-list li{display:flex;align-items:flex-start;gap:14px;padding:16px 0;border-bottom:1px solid var(--mtl-line);font-size:1.05rem;line-height:1.6;color:var(--mtl-value)}
.mtl-tick{flex:none;width:28px;height:28px;margin-top:-1px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-mist-2);color:var(--mtl-teal-deep)}
.mtl-tick .mtl-i{width:16px;height:16px;stroke-width:2.2;stroke-dasharray:24;stroke-dashoffset:0}
.mtl-js [data-reveal] .mtl-tick .mtl-i{stroke-dashoffset:24;transition:stroke-dashoffset .6s var(--mtl-ease) calc(var(--d,0s) + .25s)}
.mtl-js [data-reveal].is-in .mtl-tick .mtl-i{stroke-dashoffset:0}
@container mtl (max-width:639px){.mtl-learn-list{grid-template-columns:minmax(0,1fr)}.mtl-learn-list li{font-size:1rem}}

/* accordion (curriculum, faq, learn nav) — height via grid rows */
.mtl-acc__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .45s var(--mtl-ease)}
.mtl-acc__panel>div{min-height:0;overflow:hidden}
.is-open>.mtl-acc__panel{grid-template-rows:1fr}
.mtl-acc__chev{transition:rotate .45s var(--mtl-ease);color:var(--mtl-muted-icon)}
.is-open>.mtl-acc__head .mtl-acc__chev{rotate:180deg;color:var(--mtl-teal-deep)}

.mtl-curr{display:grid;gap:12px}
.mtl-mod{background:var(--mtl-white);border:1px solid var(--mtl-line);border-radius:var(--mtl-r-md);box-shadow:var(--mtl-shadow-soft);transition:border-color var(--mtl-t),box-shadow var(--mtl-t)}
.mtl-mod.is-open{border-color:#CFE3E3;box-shadow:0 18px 40px -28px rgba(31,58,82,.35)}
.mtl .mtl-mod__head{display:flex;align-items:center;gap:16px;width:100%;min-height:76px;padding:14px 22px;border:0;background:none;border-radius:inherit;cursor:pointer;text-align:start;font:inherit;color:inherit}
.mtl-mod__num{flex:none;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-mist);color:var(--mtl-primary);font-weight:800;font-size:.95rem;transition:background var(--mtl-t),color var(--mtl-t)}
.mtl-mod.is-open .mtl-mod__num{background:var(--mtl-teal);color:#fff}
.mtl-mod__t{flex:1;min-width:0;display:grid;gap:2px}
.mtl-mod__title{font-size:1.08rem;font-weight:700;color:var(--mtl-value)}
.mtl-mod__meta{font-size:.85rem;color:var(--mtl-text)}
.mtl-lessons{padding:0 22px 12px;margin-inline-start:54px}
.mtl-lesson{display:flex;align-items:center;gap:14px;min-height:54px;padding:8px 0;border-top:1px solid var(--mtl-line-soft);font-size:.98rem;color:var(--mtl-value)}
.mtl-lesson__icon{flex:none;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--mtl-mist);color:var(--mtl-ink)}
.mtl-lesson__icon .mtl-i{width:17px;height:17px}
.mtl-lesson__title{flex:1;min-width:0}
.mtl .mtl-lesson__title a{color:inherit;text-decoration:none}
.mtl .mtl-lesson__title a:hover{color:var(--mtl-teal-deep)}
.mtl-lesson__type{font-size:.8rem;color:var(--mtl-text);margin-inline-start:6px}
.mtl-lesson__dur{flex:none;font-size:.88rem;color:var(--mtl-text);font-variant-numeric:tabular-nums}
.mtl-lesson__lock{flex:none;color:#B3BEC4}
.mtl-lesson__lock .mtl-i{width:17px;height:17px}
.mtl .mtl-lesson__preview{flex:none;display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border:0;border-radius:var(--mtl-r-pill);background:var(--mtl-mist-2);color:var(--mtl-teal-deep);font:inherit;font-size:.82rem;font-weight:700;cursor:pointer;transition:background var(--mtl-t-fast)}
.mtl .mtl-lesson__preview:hover{background:#DDF4F2}
.mtl .mtl-lesson__preview .mtl-i{width:14px;height:14px;fill:currentColor;stroke:none}
.mtl-lesson.is-done .mtl-lesson__icon{background:var(--mtl-teal);color:#fff}
@container mtl (max-width:639px){
  .mtl .mtl-mod__head{padding:14px 16px;gap:12px;min-height:68px}
  .mtl-mod__num{width:32px;height:32px;font-size:.88rem}
  .mtl-lessons{margin-inline-start:0;padding:0 16px 8px}
  .mtl-lesson{gap:12px;font-size:.95rem}
  .mtl-lesson__type{display:none}
}

/* instructor */
.mtl-teacher{display:grid;grid-template-columns:220px minmax(0,1fr);gap:44px;align-items:center}
.mtl-teacher__photo{position:relative;aspect-ratio:4/5}
.mtl-teacher__photo .mtl-frame{position:absolute;inset:0;--mtl-lobe:110px}
.mtl-teacher__photo .mtl-frame__orbit{translate:calc(-14px + var(--mx,0) * 6px) calc(-14px + var(--my,0) * 5px)}
.mtl-teacher__photo .mtl-frame__tint{background:linear-gradient(0deg,rgba(33,183,177,.12),rgba(33,183,177,0) 40%)}
.mtl .mtl-teacher__name{font-size:1.6rem;font-weight:800;color:var(--mtl-primary);margin-top:10px}
.mtl-teacher__role{color:var(--mtl-teal-deep);font-weight:500;margin-top:2px}
.mtl .mtl-teacher__bio{margin-top:16px;font-size:1.05rem;line-height:1.9;max-width:56ch}
.mtl-teacher__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.mtl-teacher__more{margin-top:20px}
@container mtl (max-width:639px){
  .mtl-teacher{grid-template-columns:120px minmax(0,1fr);gap:20px;align-items:start}
  .mtl-teacher__photo .mtl-frame{--mtl-lobe:60px}
  .mtl-teacher__photo .mtl-frame__orbit{translate:-8px -8px}
  .mtl .mtl-teacher__name{font-size:1.25rem}
  .mtl-teacher__text{display:contents}
  .mtl-teacher__head{align-self:center}
  .mtl-teacher__rest{grid-column:1/-1}
  .mtl .mtl-teacher__bio{margin-top:0;font-size:1rem}
}

/* faq */
.mtl-faq{display:grid;border-top:1px solid var(--mtl-line)}
.mtl-faq__item{border-bottom:1px solid var(--mtl-line)}
.mtl .mtl-faq__q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:68px;padding:16px 4px;border:0;background:none;cursor:pointer;text-align:start;font:inherit;font-size:1.08rem;font-weight:700;color:var(--mtl-value);transition:color var(--mtl-t-fast)}
.mtl .mtl-faq__q:hover{color:var(--mtl-teal-deep)}
.mtl-faq__plus{position:relative;flex:none;width:32px;height:32px;border-radius:50%;background:var(--mtl-mist);transition:background var(--mtl-t),rotate .45s var(--mtl-ease)}
.mtl-faq__plus::before,.mtl-faq__plus::after{content:"";position:absolute;inset:0;margin:auto;width:12px;height:1.8px;border-radius:2px;background:var(--mtl-primary);transition:rotate .45s var(--mtl-ease),background var(--mtl-t)}
.mtl-faq__plus::after{rotate:90deg}
.is-open .mtl-faq__plus{background:var(--mtl-teal);rotate:180deg}
.is-open .mtl-faq__plus::before,.is-open .mtl-faq__plus::after{background:#fff}
.is-open .mtl-faq__plus::after{rotate:0deg}
.mtl .mtl-faq__a p{padding:0 4px 22px;max-width:64ch;font-size:1rem;line-height:1.9}

/* sticky purchase aside (desktop) */
.mtl-aside{position:sticky;top:calc(var(--mtl-sticky) + 84px);display:grid;gap:18px;padding:14px 14px 22px;background:var(--mtl-glass);border:1px solid var(--mtl-glass-line);border-radius:var(--mtl-r-lg);box-shadow:var(--mtl-shadow),inset 0 1px 0 #fff;backdrop-filter:blur(var(--mtl-blur)) saturate(150%);-webkit-backdrop-filter:blur(var(--mtl-blur)) saturate(150%)}
.mtl-aside__thumb{position:relative;aspect-ratio:16/10;border-radius:18px;border-top-left-radius:64px;overflow:hidden}
.mtl-aside__thumb img{width:100%;height:100%;object-fit:cover}
.mtl-aside__inner{display:grid;gap:16px;padding-inline:8px}
.mtl-aside__title{font-weight:700;color:var(--mtl-value);line-height:1.5}
.mtl-aside .mtl-price b{font-size:1.6rem}
.mtl-aside__list{display:grid;gap:10px;font-size:.92rem;color:var(--mtl-value)}
.mtl-aside__list li{display:flex;align-items:center;gap:10px}
.mtl-aside__list .mtl-i{width:18px;height:18px;color:var(--mtl-teal-deep)}
@container mtl (max-width:1099px){.mtl-aside{display:none}}

/* related */
.mtl-related{margin-top:96px}
.mtl-related .mtl-grid{margin-top:28px}
@container mtl (max-width:639px){.mtl-related{margin-top:64px}}

/* ================================================================
   PLAYER (prototype engine; real <video> plugs into the same shell)
   ================================================================ */
.mtl-player{position:relative;width:100%;aspect-ratio:16/9;border-radius:var(--mtl-r-lg);overflow:hidden;background:#123047;color:#fff;isolation:isolate;-webkit-mask-image:-webkit-radial-gradient(white,black);mask-image:radial-gradient(white,black);user-select:none}
.mtl-player--fill{position:absolute;inset:0;aspect-ratio:auto;border-radius:inherit}
.mtl-player__media{position:absolute;inset:0}
.mtl-player__media img,.mtl-player__media video{width:100%;height:100%;object-fit:cover;transform-origin:60% 40%}
.mtl-player__media img{animation:mtl-ken 40s linear infinite alternate;animation-play-state:paused}
.mtl-player.is-playing .mtl-player__media img{animation-play-state:running}
@keyframes mtl-ken{from{scale:1.02;translate:0 0}to{scale:1.16;translate:-2% 1%}}
.mtl-player__shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(18,48,71,.15),rgba(18,48,71,0) 30%,rgba(18,48,71,0) 55%,rgba(18,48,71,.7));transition:opacity .5s}
.mtl-player:not(.is-started) .mtl-player__shade{background:linear-gradient(180deg,rgba(18,48,71,.05),rgba(18,48,71,.35))}
.mtl-player__cap{position:absolute;z-index:3;inset-inline:10%;inset-block-end:86px;display:flex;justify-content:center;pointer-events:none;transition:inset-block-end .4s var(--mtl-ease)}
.mtl-player__cap span{padding:6px 14px;border-radius:10px;background:rgba(10,30,45,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);font-size:clamp(.9rem,.7rem + .6vw,1.2rem);font-weight:500;line-height:1.6;text-align:center;animation:mtl-cap .4s var(--mtl-ease)}
@keyframes mtl-cap{from{opacity:0;translate:0 6px}}
.mtl-player.is-idle .mtl-player__cap{inset-block-end:30px}
.mtl-player__tag{position:absolute;z-index:3;inset-block-start:16px;inset-inline-start:16px;display:flex;gap:8px}
.mtl-player .mtl-playbtn{z-index:5}
.mtl-player.is-started .mtl-playbtn{opacity:0;scale:.9;pointer-events:none;transition:opacity .3s,scale .4s var(--mtl-ease)}
.mtl-player__bar{position:absolute;z-index:4;inset-inline:14px;inset-block-end:14px;display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:18px;background:rgba(14,38,56,.42);border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);direction:ltr;opacity:0;translate:0 10px;pointer-events:none;transition:opacity .35s,translate .45s var(--mtl-ease)}
.mtl-player.is-started .mtl-player__bar{opacity:1;translate:0 0;pointer-events:auto}
.mtl-player.is-started.is-idle .mtl-player__bar{opacity:0;translate:0 10px;pointer-events:none}
.mtl .mtl-player__ctl{flex:none;width:38px;height:38px;border:0;border-radius:12px;background:transparent;color:#fff;display:grid;place-items:center;cursor:pointer;font-family:var(--mtl-font);font-size:.82rem;font-weight:700;transition:background var(--mtl-t-fast)}
.mtl .mtl-player__ctl:hover{background:rgba(255,255,255,.14)}
.mtl .mtl-player__ctl[aria-pressed="false"]{opacity:.55}
.mtl-player__ctl .mtl-i{width:20px;height:20px}
.mtl-player__ctl .mtl-i--solid{fill:currentColor;stroke:none}
.mtl-player__time{flex:none;min-width:88px;font-size:.82rem;font-variant-numeric:tabular-nums;opacity:.9;text-align:center}
.mtl-scrub{position:relative;flex:1;height:30px;display:flex;align-items:center;cursor:pointer;touch-action:none}
.mtl-scrub__track{position:relative;width:100%;height:5px;border-radius:5px;background:rgba(255,255,255,.22);transition:height .2s}
.mtl-scrub:hover .mtl-scrub__track{height:7px}
.mtl-scrub__seen{position:absolute;inset-block:0;left:0;border-radius:inherit;background:rgba(255,255,255,.35)}
.mtl-scrub__played{position:absolute;inset-block:0;left:0;border-radius:inherit;background:linear-gradient(90deg,var(--mtl-teal-soft),var(--mtl-aqua))}
.mtl-scrub__mark{position:absolute;top:-5px;bottom:-5px;width:2px;border-radius:2px;background:#fff;opacity:.85}
.mtl-scrub__mark::after{content:attr(data-label);position:absolute;bottom:calc(100% + 6px);left:50%;translate:-50% 0;padding:3px 8px;border-radius:8px;background:#fff;color:var(--mtl-primary);font-size:.72rem;font-weight:700;white-space:nowrap;opacity:0;transition:opacity .2s;direction:rtl}
.mtl-scrub:hover .mtl-scrub__mark::after{opacity:1}
.mtl-scrub__mark.is-reached{background:var(--mtl-aqua)}
.mtl-scrub__thumb{position:absolute;top:50%;width:14px;height:14px;margin-left:-7px;border-radius:50%;background:#fff;translate:0 -50%;box-shadow:0 2px 8px rgba(0,0,0,.3);scale:0;transition:scale .2s var(--mtl-ease)}
.mtl-scrub:hover .mtl-scrub__thumb,.mtl-scrub.is-drag .mtl-scrub__thumb{scale:1}
.mtl-scrub:focus-visible{outline:2px solid var(--mtl-aqua);outline-offset:2px;border-radius:6px}
.mtl-player__wm{position:absolute;z-index:3;max-width:60%;padding:3px 8px;border-radius:6px;font-size:clamp(.66rem,.55rem + .3vw,.82rem);font-weight:500;color:rgba(255,255,255,.42);text-shadow:0 1px 2px rgba(0,0,0,.35);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;pointer-events:none;user-select:none;transition:left 2.4s var(--mtl-ease),top 2.4s var(--mtl-ease);direction:ltr}
.mtl-player.is-unavailable .mtl-playbtn{opacity:.5;cursor:not-allowed}
.mtl-player.is-unavailable .mtl-player__cap{inset-block-end:30px}
.mtl-cert__ribbon--ok{background:var(--mtl-mist-2);color:var(--mtl-teal-deep)}
.mtl-done__pending{display:grid;gap:10px;padding:14px 16px;border-radius:var(--mtl-r-md);background:var(--mtl-sky);color:var(--mtl-ink);font-size:.95rem;line-height:1.7}
.mtl-done__pending b{color:var(--mtl-primary)}
.mtl-done__pending ul{display:grid;gap:6px}
.mtl-done__pending a{font-weight:700}
.mtl-scrub__cp{position:absolute;top:50%;width:9px;height:9px;margin-left:-4.5px;border-radius:50%;background:#FFD66B;box-shadow:0 0 0 2px rgba(14,38,56,.6);translate:0 -50%;pointer-events:none}
.mtl-player.is-asking .mtl-player__bar,.mtl-player.is-asking .mtl-player__cap{opacity:0;pointer-events:none}
.mtl-player.is-asking .mtl-player__shade{background:rgba(14,38,56,.55)}
.mtl-cq{position:absolute;z-index:6;inset:0;display:grid;place-items:center;padding:18px;animation:mtl-cq-in .45s var(--mtl-ease);direction:rtl}
@keyframes mtl-cq-in{from{opacity:0}}
.mtl-cq__card{width:min(520px,100%);max-height:100%;overflow:auto;padding:22px;border-radius:var(--mtl-r-lg);background:rgba(255,255,255,.94);backdrop-filter:blur(18px) saturate(150%);-webkit-backdrop-filter:blur(18px) saturate(150%);box-shadow:0 30px 60px -30px rgba(10,30,45,.7);color:var(--mtl-value);animation:mtl-rise .5s var(--mtl-ease)}
.mtl-cq--below{position:relative;inset:auto;display:block;padding:0;margin-top:12px}
.mtl-cq--below .mtl-cq__card{width:100%;background:var(--mtl-white);border:1px solid var(--mtl-line);box-shadow:var(--mtl-shadow-soft)}
.mtl-cq__head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.mtl-cq__timer{position:relative;display:flex;align-items:center;gap:8px;min-width:84px;font-size:.85rem;font-weight:700;color:var(--mtl-primary);font-variant-numeric:tabular-nums}
.mtl-cq__timer i{flex:1;height:5px;border-radius:5px;background:linear-gradient(90deg,var(--mtl-teal),var(--mtl-teal-soft));transform-origin:100% 50%;animation:mtl-cq-time linear forwards}
.mtl-cq__timer.is-stopped i{animation-play-state:paused;opacity:.4}
@keyframes mtl-cq-time{from{scale:1 1}to{scale:0 1}}
.mtl .mtl-cq__q{margin-top:12px;font-size:1.08rem;font-weight:700;line-height:1.6}
.mtl-cq__opts{display:grid;gap:8px;margin-top:14px}
.mtl .mtl-cq__opt{display:flex;align-items:center;gap:12px;min-height:48px;padding:8px 12px;border:1.5px solid var(--mtl-line);border-radius:var(--mtl-r-sm);background:var(--mtl-white);color:var(--mtl-value);font:inherit;font-size:.95rem;text-align:start;cursor:pointer;transition:border-color var(--mtl-t-fast),background var(--mtl-t-fast)}
.mtl .mtl-cq__opt span{flex:none;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--mtl-mist);color:var(--mtl-ink);font-weight:700;font-size:.85rem}
.mtl .mtl-cq__opt:hover:not(:disabled){border-color:var(--mtl-teal);background:var(--mtl-mist)}
.mtl .mtl-cq__opt:disabled{cursor:default}
.mtl .mtl-cq__opt.is-correct{border-color:var(--mtl-teal);background:var(--mtl-mist-2)}
.mtl .mtl-cq__opt.is-correct span{background:var(--mtl-teal);color:#fff}
.mtl .mtl-cq__opt.is-wrong{border-color:#E9B7B3;background:var(--mtl-danger-bg);animation:mtl-soft-shake .45s var(--mtl-ease)}
.mtl .mtl-cq__opt.is-wrong span{background:#F3D3D0;color:#9C3631}
.mtl-cq__fb:empty{display:none}
.mtl-cq__fb{display:grid;gap:12px;justify-items:start;margin-top:12px;animation:mtl-rise .35s var(--mtl-ease)}
.mtl-cq__ok{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--mtl-teal-deep)}
.mtl-cq__why{display:flex;gap:10px;padding:12px 14px;border-radius:var(--mtl-r-sm);background:var(--mtl-sky);color:var(--mtl-ink);font-size:.92rem;line-height:1.7}
.mtl-cq__why .mtl-i{color:var(--mtl-primary);margin-top:3px}
.mtl-cq__why b{display:block;color:var(--mtl-primary)}
.mtl-cq__foot{margin-top:12px;font-size:.78rem;color:var(--mtl-text)}
.mtl-player__note{position:absolute;z-index:3;inset-block-start:16px;inset-inline-end:16px}
.mtl-player:fullscreen{border-radius:0}
@container mtl (max-width:639px){
  .mtl-player{border-radius:18px}
  .mtl-player__bar{inset-inline:8px;inset-block-end:8px;padding:4px 6px;gap:2px;border-radius:14px}
  .mtl .mtl-player__ctl{width:34px;height:34px}
  .mtl-player__time{min-width:74px;font-size:.75rem}
  .mtl-player__ctl--speed{display:none}
  .mtl-player__cap{inset-block-end:58px;inset-inline:6%}
  .mtl .mtl-playbtn{padding-block:8px;padding-inline:8px 18px;gap:10px;font-size:.92rem}
  .mtl-playbtn__disc{width:46px;height:46px}
}

/* ================================================================
   LAYERS: toast, modal, sheet, sticky bars (outside the container)
   ================================================================ */
.mtl-toast{position:fixed;z-index:9990;inset-block-start:calc(var(--mtl-sticky) + 20px);inset-inline-start:50%;translate:50% -12px;display:flex;align-items:center;gap:12px;max-width:calc(100vw - 32px);padding:10px 10px 10px 18px;padding-inline-start:16px;border-radius:var(--mtl-r-pill);background:var(--mtl-primary);color:#fff;font-size:.95rem;box-shadow:0 18px 36px -16px rgba(39,84,126,.7);opacity:0;pointer-events:none;transition:opacity .35s,translate .5s var(--mtl-ease)}
.mtl-toast.is-in{opacity:1;translate:50% 0;pointer-events:auto}
.mtl-toast .mtl-i{color:var(--mtl-aqua)}
.mtl .mtl-toast a{color:#fff;font-weight:700;padding:6px 12px;border-radius:var(--mtl-r-pill);background:rgba(255,255,255,.14);text-decoration:none;white-space:nowrap}
.mtl .mtl-toast a:hover{background:rgba(255,255,255,.24)}
.mtl-toast span{min-width:0}

.mtl-scrim{position:fixed;inset:0;z-index:9980;background:rgba(18,40,58,.38);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:opacity .4s}
.mtl-scrim.is-in{opacity:1;pointer-events:auto}
.mtl-modal{position:fixed;z-index:9985;inset:0;display:grid;place-items:center;padding:24px;pointer-events:none}
.mtl-modal__box{position:relative;width:min(960px,100%);pointer-events:auto;opacity:0;scale:.96;translate:0 12px;transition:opacity .35s,scale .5s var(--mtl-ease),translate .5s var(--mtl-ease)}
.mtl-modal.is-in .mtl-modal__box{opacity:1;scale:1;translate:0 0}
.mtl-modal__head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px;color:#fff}
.mtl-modal__head b{font-size:1.1rem}
.mtl-modal__head small{display:block;font-size:.85rem;opacity:.8;font-weight:400}
.mtl .mtl-iconbtn{flex:none;width:44px;height:44px;border-radius:50%;border:0;display:grid;place-items:center;background:rgba(255,255,255,.18);color:#fff;cursor:pointer;transition:background var(--mtl-t-fast),rotate .4s var(--mtl-ease)}
.mtl .mtl-iconbtn:hover{background:rgba(255,255,255,.3);rotate:90deg}
.mtl .mtl-iconbtn--light{background:var(--mtl-mist);color:var(--mtl-ink)}
.mtl .mtl-iconbtn--light:hover{background:var(--mtl-mist-2)}

.mtl-sheet{position:fixed;z-index:9985;inset-inline:0;inset-block-end:0;max-height:min(86svh,760px);display:flex;flex-direction:column;background:var(--mtl-white);border-radius:28px 28px 0 0;box-shadow:0 -20px 60px -20px rgba(18,40,58,.4);translate:0 105%;transition:translate .55s var(--mtl-ease);padding-bottom:env(safe-area-inset-bottom)}
.mtl-sheet.is-in{translate:0 var(--drag,0px)}
.mtl-sheet.is-dragging{transition:none}
.mtl-sheet__grab{flex:none;display:grid;place-items:center;height:28px;cursor:grab;touch-action:none}
.mtl-sheet__grab::before{content:"";width:44px;height:5px;border-radius:3px;background:#D5DFE0}
.mtl-sheet__head{flex:none;display:flex;align-items:center;gap:12px;padding:0 20px 14px;border-bottom:1px solid var(--mtl-line-soft);touch-action:none}
.mtl-sheet__head>div{flex:1;min-width:0;display:grid;gap:8px}
.mtl-sheet__title{font-size:1.15rem;font-weight:700;color:var(--mtl-primary)}
.mtl-sheet__body{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:8px 12px 20px}

/* mobile sticky action (course page) */
.mtl-mbar{position:fixed;z-index:9970;inset-inline:10px;inset-block-end:calc(10px + env(safe-area-inset-bottom));display:none;align-items:center;gap:12px;padding:8px 8px 8px 10px;padding-inline-start:18px;border-radius:22px;background:rgba(255,255,255,.88);border:1px solid var(--mtl-glass-line);box-shadow:0 20px 40px -18px rgba(18,40,58,.45),inset 0 1px 0 #fff;backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);translate:0 140%;transition:translate .5s var(--mtl-ease)}
.mtl-mbar.is-in{translate:0 0}
.mtl-mbar__info{flex:1;min-width:0;display:grid;gap:0}
.mtl-mbar__info small{font-size:.78rem;color:var(--mtl-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mtl-mbar .mtl-price b{font-size:1.2rem}
.mtl-mbar .mtl-btn{height:48px;padding:0 20px;font-size:.98rem}
@media (max-width:1099px){.mtl-mbar{display:flex}}
@media (min-width:640px) and (max-width:1099px){.mtl-mbar{inset-inline:auto 24px;width:440px}}

/* ================================================================
   3) LEARN
   ================================================================ */
.mtl-page--learn{padding-block:28px 96px}
.mtl-ltop{display:flex;align-items:center;gap:20px;padding:12px 14px 12px 22px;padding-inline-start:12px;border-radius:var(--mtl-r-lg);background:var(--mtl-glass);border:1px solid var(--mtl-glass-line);box-shadow:var(--mtl-shadow-soft),inset 0 1px 0 #fff;backdrop-filter:blur(var(--mtl-blur)) saturate(150%);-webkit-backdrop-filter:blur(var(--mtl-blur)) saturate(150%)}
.mtl .mtl-ltop__back{flex:none;display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--mtl-mist);color:var(--mtl-ink);text-decoration:none;transition:background var(--mtl-t-fast),color var(--mtl-t-fast)}
.mtl .mtl-ltop__back:hover{background:var(--mtl-mist-2);color:var(--mtl-teal-deep)}
.mtl .mtl-ltop__back:hover .mtl-i{translate:3px 0}
.mtl-ltop__back .mtl-i{transition:translate var(--mtl-t) var(--mtl-ease)}
.mtl-ltop__course{flex:1;min-width:0;display:grid;gap:2px}
.mtl-ltop__course small{font-size:.82rem;color:var(--mtl-text)}
.mtl-ltop__course b{font-size:1.02rem;color:var(--mtl-value);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mtl-ltop__prog{flex:0 1 300px;display:grid;gap:8px;min-width:200px}
.mtl-ltop__nums{display:flex;align-items:baseline;justify-content:space-between;gap:10px;font-size:.85rem;color:var(--mtl-text)}
.mtl-ltop__nums b{font-size:1.15rem;font-weight:800;color:var(--mtl-primary);font-variant-numeric:tabular-nums}
.mtl-ltop__prog .mtl-progress{height:8px}
@container mtl (max-width:879px){
  .mtl-page--learn{padding-block:12px 120px}
  .mtl-ltop{flex-wrap:wrap;gap:10px 12px;padding:10px;padding-inline-end:16px;background:var(--mtl-white);backdrop-filter:none;-webkit-backdrop-filter:none;border-color:var(--mtl-line)}
  .mtl .mtl-ltop__back{width:40px;height:40px;border-radius:12px}
  .mtl-ltop__prog{flex:1 1 100%;min-width:0;padding-inline:4px}
  .mtl-ltop__prog .mtl-progress{height:6px}
}

.mtl-learn{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;margin-top:22px}
@container mtl (min-width:880px){.mtl-learn{grid-template-columns:minmax(0,1fr) 320px;align-items:start}}
@container mtl (min-width:1100px){.mtl-learn{grid-template-columns:minmax(0,1fr) 370px;gap:36px}}
.mtl-learn__main{min-width:0;display:grid;gap:32px}
.mtl-learn__main.is-swapping{animation:mtl-swap .55s var(--mtl-ease)}
@keyframes mtl-swap{from{opacity:0;translate:-16px 0}}

/* course navigation (desktop aside + mobile sheet share markup) */
.mtl-cnav{position:sticky;top:calc(var(--mtl-sticky) + 20px);display:flex;flex-direction:column;max-height:calc(100vh - var(--mtl-sticky) - 40px);background:var(--mtl-white);border:1px solid var(--mtl-line);border-radius:var(--mtl-r-lg);box-shadow:var(--mtl-shadow-soft);overflow:hidden}
.mtl-cnav__head{flex:none;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:18px 20px 14px;border-bottom:1px solid var(--mtl-line-soft)}
.mtl-cnav__title{font-size:1.05rem;font-weight:700;color:var(--mtl-primary)}
.mtl-cnav__count{font-size:.85rem;color:var(--mtl-text)}
.mtl-cnav__body{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:8px;scrollbar-width:thin;scrollbar-color:#D5E1E2 transparent}
@container mtl (max-width:879px){.mtl-learn__aside{display:none}}
.mtl-nmod+.mtl-nmod{margin-top:2px}
.mtl .mtl-nmod__head{display:flex;align-items:center;gap:12px;width:100%;padding:12px;border:0;border-radius:var(--mtl-r-sm);background:none;cursor:pointer;text-align:start;font:inherit;color:inherit;transition:background var(--mtl-t-fast)}
.mtl .mtl-nmod__head:hover{background:var(--mtl-mist)}
.mtl-nmod__t{flex:1;min-width:0;display:grid;gap:4px}
.mtl-nmod__title{font-size:.95rem;font-weight:700;color:var(--mtl-value)}
.mtl-nmod__meta{display:flex;align-items:center;gap:8px;font-size:.78rem;color:var(--mtl-text)}
.mtl-nmod__meta .mtl-progress{width:56px;height:4px}
.mtl-nmod.is-complete .mtl-nmod__meta{color:var(--mtl-teal-deep);font-weight:700}
.mtl-nles{list-style:none;padding:2px 0 8px}
.mtl .mtl-nl{position:relative;display:flex;align-items:center;gap:12px;min-height:52px;padding:8px 12px;border-radius:var(--mtl-r-sm);color:var(--mtl-value);text-decoration:none;font-size:.93rem;line-height:1.45;transition:background var(--mtl-t-fast),color var(--mtl-t-fast)}
.mtl .mtl-nl:hover{background:var(--mtl-mist)}
.mtl-nl__st{position:relative;flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;border:1.5px solid var(--mtl-line-strong);background:var(--mtl-white);color:#fff;transition:background .4s,border-color .4s}
.mtl-nl__st .mtl-i{width:14px;height:14px;stroke-width:2.4}
.mtl-nl__t{flex:1;min-width:0;display:grid;gap:1px}
.mtl-nl__t small{display:flex;align-items:center;gap:6px;font-size:.76rem;color:var(--mtl-text)}
.mtl-nl__t small .mtl-i{width:13px;height:13px}
/* track line between states */
.mtl-nl::before{content:"";position:absolute;inset-inline-start:23.25px;inset-block:-8px;width:1.5px;background:var(--mtl-line);z-index:-1}
.mtl-nles{position:relative;z-index:0}
.mtl-nles li:first-child .mtl-nl::before{inset-block-start:50%}
.mtl-nles li:last-child .mtl-nl::before{inset-block-end:50%}
.mtl-nles li:only-child .mtl-nl::before{display:none}
/* states: done / current / open / locked */
.mtl-nl.is-done .mtl-nl__st{background:var(--mtl-teal);border-color:var(--mtl-teal)}
.mtl-nl.is-done .mtl-nl__st .mtl-i{stroke-dasharray:24;stroke-dashoffset:0}
.mtl-nl.is-justdone .mtl-nl__st .mtl-i{animation:mtl-draw24 .6s var(--mtl-ease) both}
@keyframes mtl-draw24{from{stroke-dashoffset:24}to{stroke-dashoffset:0}}
.mtl .mtl-nl.is-current{background:var(--mtl-mist-2);color:var(--mtl-primary);font-weight:700}
.mtl-nl.is-current .mtl-nl__st{border-color:var(--mtl-teal);border-width:2px}
.mtl-nl.is-current .mtl-nl__st::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--mtl-teal);animation:mtl-inhale 3s var(--mtl-ease-breath) infinite}
.mtl-nl.is-current.is-done .mtl-nl__st::after{display:none}
.mtl-nl.is-current::after{content:"";position:absolute;inset-block:12px;inset-inline-end:0;width:3px;border-radius:3px;background:var(--mtl-teal)}
.mtl .mtl-nl.is-locked{color:#9AA8B1}
.mtl-nl.is-locked .mtl-nl__st{border-color:#E1E8E9;background:#F6F8F8;color:#AEBAC0}
.mtl-nl.is-locked .mtl-nl__st .mtl-i{width:12px;height:12px;stroke-width:2}
.mtl-nl__now{flex:none;font-size:.72rem;font-weight:700;color:var(--mtl-teal-deep);background:var(--mtl-white);padding:3px 8px;border-radius:var(--mtl-r-pill)}

/* lesson stage */
.mtl-stage{position:relative}
.mtl-stage .mtl-player{box-shadow:0 40px 70px -40px rgba(18,48,71,.55)}
.mtl-lhead{display:grid;gap:12px;max-width:760px}
.mtl-lhead__eyebrow{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.mtl .mtl-lhead__title{font-size:clamp(1.6rem,1.1rem + 1.4vw,2.3rem);font-weight:800;line-height:1.25;color:var(--mtl-primary);text-wrap:balance}
.mtl .mtl-lhead__sum{font-size:1.08rem;line-height:1.9;color:var(--mtl-text);max-width:62ch}
.mtl-lbody{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;max-width:860px}
@container mtl (min-width:1100px){.mtl-lbody{grid-template-columns:minmax(0,1fr) minmax(0,300px);align-items:start}.mtl-lbody--solo{grid-template-columns:minmax(0,420px)}}
.mtl-lnotes{max-width:760px}
.mtl-points{display:grid;gap:0}
.mtl-stage.is-nudge,.mtl-read.is-nudge,.mtl-quiz.is-nudge{animation:mtl-nudge-ring 1.4s var(--mtl-ease)}
.mtl-stage{border-radius:var(--mtl-r-lg)}
@keyframes mtl-nudge-ring{0%{box-shadow:0 0 0 0 rgba(33,183,177,0)}25%{box-shadow:0 0 0 6px rgba(33,183,177,.35)}100%{box-shadow:0 0 0 14px rgba(33,183,177,0)}}
.mtl-points__title{font-size:.95rem;font-weight:700;color:var(--mtl-ink);margin-bottom:6px}
.mtl-points li{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-bottom:1px solid var(--mtl-line-soft);color:var(--mtl-value);line-height:1.7}
.mtl-points li::before{content:"";flex:none;width:8px;height:8px;margin-top:10px;border-radius:50%;background:var(--mtl-teal-soft);box-shadow:0 0 0 4px rgba(33,183,177,.12)}
.mtl .mtl-res{display:flex;align-items:center;gap:14px;margin-top:18px;padding:14px 16px;border-radius:var(--mtl-r-md);background:var(--mtl-white);border:1px solid var(--mtl-line);text-decoration:none;color:inherit;transition:border-color var(--mtl-t-fast),box-shadow var(--mtl-t)}
.mtl .mtl-res:hover{border-color:var(--mtl-teal);box-shadow:var(--mtl-shadow-soft)}
.mtl-res__icon{flex:none;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--mtl-sky);color:var(--mtl-primary)}
.mtl-res__t{flex:1;min-width:0;display:grid}
.mtl-res__t b{font-weight:700;color:var(--mtl-value);font-size:.95rem}
.mtl-res__t small{font-size:.8rem;color:var(--mtl-text)}
.mtl-res .mtl-i--dl{color:var(--mtl-teal-deep);transition:translate var(--mtl-t) var(--mtl-ease)}
.mtl-res:hover .mtl-i--dl{translate:0 2px}

/* requirements ("to finish this lesson") */
.mtl-req{padding:20px;border-radius:var(--mtl-r-lg);background:var(--mtl-white);border:1px solid var(--mtl-line);box-shadow:var(--mtl-shadow-soft);transition:box-shadow .5s,border-color .5s}
.mtl-req.is-nudge{border-color:var(--mtl-teal);box-shadow:var(--mtl-ring),var(--mtl-shadow-soft);animation:mtl-nudge .9s var(--mtl-ease)}
@keyframes mtl-nudge{30%{scale:1.015}}
.mtl-req__title{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:.95rem;font-weight:700;color:var(--mtl-ink)}
.mtl-req__list{display:grid;gap:4px;margin-top:12px}
.mtl-req__item{display:flex;align-items:flex-start;gap:12px;padding:8px 0;font-size:.93rem;color:var(--mtl-value);line-height:1.5}
.mtl-req__st{flex:none;position:relative;width:24px;height:24px;border-radius:50%;border:1.5px solid var(--mtl-line-strong);display:grid;place-items:center;color:#fff;transition:background .4s,border-color .4s}
.mtl-req__st .mtl-i{width:14px;height:14px;stroke-width:2.4;stroke-dasharray:24;stroke-dashoffset:24;transition:stroke-dashoffset .5s var(--mtl-ease) .1s}
.mtl-req__item.is-met .mtl-req__st{background:var(--mtl-teal);border-color:var(--mtl-teal)}
.mtl-req__item.is-met .mtl-req__st .mtl-i{stroke-dashoffset:0}
.mtl-req__item.is-met .mtl-req__label{color:var(--mtl-text)}
.mtl-req__label{flex:1;min-width:0;display:grid;gap:6px}
.mtl-req__label small{font-size:.8rem;color:var(--mtl-text)}
.mtl-req__label .mtl-progress{height:4px}
.mtl-req__done{display:flex;align-items:center;gap:10px;margin-top:12px;padding:12px 14px;border-radius:var(--mtl-r-sm);background:var(--mtl-mist-2);color:var(--mtl-teal-deep);font-weight:700;font-size:.93rem;animation:mtl-rise .5s var(--mtl-ease)}

/* reading lesson */
.mtl-read{max-width:68ch;display:grid;gap:18px;padding:32px;border-radius:var(--mtl-r-lg);background:var(--mtl-white);border:1px solid var(--mtl-line);box-shadow:var(--mtl-shadow-soft)}
.mtl .mtl-read p{font-size:1.08rem;line-height:2;color:var(--mtl-value)}
.mtl-read ol{display:grid;gap:10px;counter-reset:r}
.mtl-read ol li{counter-increment:r;display:flex;gap:14px;align-items:center;padding:12px 14px;border-radius:var(--mtl-r-sm);background:var(--mtl-mist);color:var(--mtl-value);font-weight:500}
.mtl-read ol li::before{content:counter(r);flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-white);color:var(--mtl-teal-deep);font-weight:800;font-size:.9rem}
.mtl-read__visual{position:relative;aspect-ratio:21/9;border-radius:var(--mtl-r-lg);border-top-left-radius:120px;overflow:hidden}
.mtl-read__visual img{width:100%;height:100%;object-fit:cover}
.mtl-read__visual::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(39,84,126,0) 40%,rgba(39,84,126,.35))}
@container mtl (max-width:639px){.mtl-read{padding:20px}.mtl-read__visual{border-top-left-radius:64px;aspect-ratio:16/9}}

/* quiz */
.mtl-quiz{position:relative;max-width:820px;padding:30px;border-radius:var(--mtl-r-lg);background:var(--mtl-white);border:1px solid var(--mtl-line);box-shadow:var(--mtl-shadow-soft);scroll-margin-top:calc(var(--mtl-sticky) + 24px);overflow:hidden}
.mtl-quiz::before{content:"";position:absolute;inset-block-start:-120px;inset-inline-end:-120px;width:280px;height:280px;border-radius:50%;background:radial-gradient(closest-side,rgba(201,246,248,.8),rgba(201,246,248,0));pointer-events:none}
.mtl-quiz__head{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.mtl-quiz__head .mtl-eyebrow{font-size:.9rem}
.mtl-quiz__steps{display:flex;align-items:center;gap:6px}
.mtl-quiz__steps i{width:22px;height:5px;border-radius:5px;background:#E4ECEC;transition:background .4s,width .4s var(--mtl-ease)}
.mtl-quiz__steps i.is-now{width:34px;background:var(--mtl-primary)}
.mtl-quiz__steps i.is-ok{background:var(--mtl-teal)}
.mtl-quiz__steps i.is-no{background:#E7A9A4}
.mtl-quiz__steps span{margin-inline-start:8px;font-size:.85rem;color:var(--mtl-text);font-variant-numeric:tabular-nums}
.mtl-q{position:relative;margin-top:22px}
.mtl-q.is-enter{animation:mtl-qin .5s var(--mtl-ease)}
@keyframes mtl-qin{from{opacity:0;translate:-24px 0}}
.mtl .mtl-q__text{font-size:1.25rem;font-weight:700;line-height:1.6;color:var(--mtl-value);text-wrap:pretty}
.mtl-opts{display:grid;gap:10px;margin-top:20px;border:0;padding:0;margin-inline:0}
.mtl-opt{position:relative;display:flex;align-items:center;gap:14px;min-height:62px;padding:12px 16px;border:1.5px solid var(--mtl-line);border-radius:var(--mtl-r-md);background:var(--mtl-white);cursor:pointer;color:var(--mtl-value);font-size:1rem;line-height:1.55;transition:border-color var(--mtl-t-fast),background var(--mtl-t),box-shadow var(--mtl-t),translate .3s var(--mtl-ease)}
.mtl-opt input{position:absolute;opacity:0;width:1px;height:1px}
.mtl-opt__key{flex:none;width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:var(--mtl-mist);color:var(--mtl-ink);font-weight:700;font-size:.95rem;transition:background var(--mtl-t),color var(--mtl-t)}
.mtl-opt__text{flex:1;min-width:0}
.mtl-opt__mark{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;opacity:0;scale:.6;transition:opacity .3s,scale .4s var(--mtl-ease)}
.mtl-opt__mark .mtl-i{width:16px;height:16px;stroke-width:2.4;stroke-dasharray:24;stroke-dashoffset:24}
.mtl-opt:hover{border-color:var(--mtl-line-strong);background:#FBFDFD}
.mtl-opt:has(input:focus-visible){box-shadow:var(--mtl-ring);border-color:var(--mtl-teal)}
.mtl-opt.is-selected{border-color:var(--mtl-teal);background:var(--mtl-mist-2);box-shadow:0 10px 24px -18px rgba(33,183,177,.9)}
.mtl-opt.is-selected .mtl-opt__key{background:var(--mtl-teal);color:#fff}
.mtl-opts.is-checked .mtl-opt{cursor:default}
.mtl-opts.is-checked .mtl-opt:not(.is-correct):not(.is-wrong){opacity:.55}
.mtl-opt.is-correct{border-color:var(--mtl-teal);background:var(--mtl-mist-2)}
.mtl-opt.is-correct .mtl-opt__key{background:var(--mtl-teal);color:#fff}
.mtl-opt.is-correct .mtl-opt__mark{opacity:1;scale:1;background:var(--mtl-teal);color:#fff}
.mtl-opt.is-correct .mtl-opt__mark .mtl-i{animation:mtl-draw24 .5s var(--mtl-ease) .15s forwards}
.mtl-opt.is-wrong{border-color:#E9B7B3;background:var(--mtl-danger-bg);animation:mtl-soft-shake .45s var(--mtl-ease)}
.mtl-opt.is-wrong .mtl-opt__key{background:#F3D3D0;color:#9C3631}
.mtl-opt.is-wrong .mtl-opt__mark{opacity:1;scale:1;background:#F3D3D0;color:#9C3631}
.mtl-opt.is-wrong .mtl-opt__mark .mtl-i{animation:mtl-draw24 .5s var(--mtl-ease) .15s forwards}
@keyframes mtl-soft-shake{25%{translate:4px 0}55%{translate:-3px 0}80%{translate:1px 0}}
.mtl-fb{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s var(--mtl-ease)}
.mtl-fb>div{min-height:0;overflow:hidden}
.mtl-fb.is-open{grid-template-rows:1fr}
.mtl-fb__box{display:flex;gap:12px;margin-top:16px;padding:14px 16px;border-radius:var(--mtl-r-md);font-size:.95rem;line-height:1.75}
.mtl-fb__box .mtl-i{margin-top:3px}
.mtl-fb__box b{display:block;font-size:1rem}
.mtl-fb--ok .mtl-fb__box{background:var(--mtl-mist-2);color:var(--mtl-ink)}
.mtl-fb--ok .mtl-fb__box .mtl-i,.mtl-fb--ok b{color:var(--mtl-teal-deep)}
.mtl-fb--no .mtl-fb__box{background:var(--mtl-sky);color:var(--mtl-ink)}
.mtl-fb--no .mtl-fb__box .mtl-i,.mtl-fb--no b{color:var(--mtl-primary)}
.mtl-quiz__actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:22px}
.mtl-quiz__hint{font-size:.88rem;color:var(--mtl-text)}
/* quiz result */
.mtl-qres{position:relative;display:grid;justify-items:start;gap:10px;margin-top:22px;animation:mtl-rise .6s var(--mtl-ease)}
.mtl-qres__score{display:flex;align-items:baseline;gap:10px}
.mtl-qres__score b{font-size:3rem;font-weight:800;line-height:1;color:var(--mtl-primary);font-variant-numeric:tabular-nums}
.mtl-qres__score span{font-size:1.05rem;color:var(--mtl-text)}
.mtl .mtl-qres__title{font-size:1.35rem;font-weight:700;color:var(--mtl-value)}
.mtl .mtl-qres__text{font-size:1rem;line-height:1.8;max-width:52ch}
.mtl-qres__bars{display:flex;gap:6px;margin-block:6px}
.mtl-qres__bars i{width:40px;height:8px;border-radius:8px;background:var(--mtl-teal);animation:mtl-grow .6s var(--mtl-ease) both;animation-delay:calc(var(--i) * 90ms)}
.mtl-qres__bars i.is-no{background:#E7A9A4}
@keyframes mtl-grow{from{scale:0 1}}
.mtl-qres__actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
@container mtl (max-width:639px){
  .mtl-quiz{padding:20px 16px;border-radius:20px}
  .mtl .mtl-q__text{font-size:1.1rem}
  .mtl-opt{min-height:56px;padding:10px 12px;gap:12px;font-size:.96rem}
  .mtl-opt__key{width:30px;height:30px;border-radius:10px}
  .mtl-quiz__actions .mtl-btn{flex:1}
}

/* pager */
.mtl-pager{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;padding-top:28px;border-top:1px solid var(--mtl-line)}
.mtl .mtl-pager__item{display:flex;align-items:center;gap:14px;min-height:76px;padding:12px 18px;border-radius:var(--mtl-r-lg);border:1.5px solid var(--mtl-line);background:var(--mtl-white);color:inherit;text-decoration:none;cursor:pointer;font:inherit;text-align:start;transition:border-color var(--mtl-t),box-shadow var(--mtl-t),translate var(--mtl-t) var(--mtl-ease),background var(--mtl-t)}
.mtl .mtl-pager__item:hover{border-color:var(--mtl-teal);box-shadow:var(--mtl-shadow-soft)}
.mtl-pager__item--next{justify-content:flex-end;text-align:end}
.mtl-pager__t{min-width:0;display:grid;gap:2px}
.mtl-pager__t small{font-size:.82rem;color:var(--mtl-text)}
.mtl-pager__t b{font-size:1rem;color:var(--mtl-value);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mtl-pager__ico{flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-mist);color:var(--mtl-ink);transition:background var(--mtl-t),color var(--mtl-t),translate var(--mtl-t) var(--mtl-ease)}
.mtl .mtl-pager__item--next.is-ready{background:var(--mtl-teal);border-color:var(--mtl-teal);box-shadow:0 16px 30px -18px rgba(33,183,177,.9)}
.mtl .mtl-pager__item--next.is-ready:hover{background:var(--mtl-teal-deep);border-color:var(--mtl-teal-deep)}
.mtl-pager__item--next.is-ready .mtl-pager__t small,.mtl-pager__item--next.is-ready .mtl-pager__t b{color:#fff}
.mtl-pager__item--next.is-ready .mtl-pager__ico{background:rgba(255,255,255,.2);color:#fff}
.mtl-pager__item--next.is-ready:hover .mtl-pager__ico{translate:-4px 0}
.mtl-pager__item--prev:hover .mtl-pager__ico{translate:4px 0}
.mtl .mtl-pager__item--next.is-locked{border-style:dashed;background:transparent}
.mtl-pager__item--next.is-locked .mtl-pager__ico{background:#F1F4F5;color:#A9B5BB}
.mtl-pager__item--next.is-locked .mtl-pager__t b{color:var(--mtl-text)}
.mtl-pager__item.is-empty{visibility:hidden}
.mtl-pager__hint{grid-column:1/-1;display:flex;align-items:flex-start;gap:10px;padding:12px 16px;border-radius:var(--mtl-r-md);background:var(--mtl-sky);color:var(--mtl-ink);font-size:.93rem;line-height:1.6;animation:mtl-rise .4s var(--mtl-ease)}
.mtl-pager__hint .mtl-i{color:var(--mtl-primary);margin-top:2px}
.mtl-pager__item--next.is-shine{animation:mtl-unlock .9s var(--mtl-ease)}
@container mtl (max-width:879px){.mtl-pager{display:none}}

/* lesson complete flash */
.mtl-flash{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:var(--mtl-r-lg);background:linear-gradient(100deg,var(--mtl-mist-2),#F3FCFB);border:1px solid #CBEDEA;color:var(--mtl-ink);animation:mtl-rise .6s var(--mtl-ease)}
.mtl-flash__mark{position:relative;flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-teal);color:#fff}
.mtl-flash__mark::before{content:"";position:absolute;inset:0;border-radius:50%;border:1.5px solid rgba(33,183,177,.5);animation:mtl-ripple 1.8s var(--mtl-ease) 1}
.mtl-flash__mark .mtl-i{width:22px;height:22px;stroke-width:2.4;stroke-dasharray:24;animation:mtl-draw24 .6s var(--mtl-ease) .15s both}
@keyframes mtl-ripple{from{scale:1;opacity:1}to{scale:1.9;opacity:0}}
.mtl-flash__t{flex:1;min-width:0}
.mtl-flash__t b{display:block;color:var(--mtl-teal-deep);font-size:1.02rem}
.mtl-flash__t span{font-size:.9rem;color:var(--mtl-text)}

/* locked lesson view */
.mtl-locked{position:relative;aspect-ratio:16/9;border-radius:var(--mtl-r-lg);overflow:hidden;display:grid;place-items:center;text-align:center;color:#fff;isolation:isolate}
.mtl-locked img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:blur(18px) saturate(80%);scale:1.15;z-index:-2}
.mtl-locked::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(18,48,71,.35),rgba(18,48,71,.7));z-index:-1}
.mtl-locked__inner{display:grid;justify-items:center;gap:12px;max-width:440px;padding:24px}
.mtl-locked__icon{position:relative;width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.5);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.mtl-locked__icon::before{content:"";position:absolute;inset:-9px;border-radius:50%;border:1.5px solid rgba(255,255,255,.35);animation:mtl-halo var(--mtl-breath) var(--mtl-ease-breath) infinite}
.mtl-locked__icon .mtl-i{width:30px;height:30px}
.mtl .mtl-locked__title{font-size:1.4rem;font-weight:700;line-height:1.4}
.mtl .mtl-locked__text{font-size:1rem;line-height:1.75;opacity:.9}
.mtl-locked__text q{font-weight:700;quotes:"«" "»"}
.mtl .mtl-locked .mtl-btn--ghost{background:#fff;border-color:#fff;margin-top:8px}
@container mtl (max-width:639px){.mtl-locked{aspect-ratio:4/5;border-radius:20px}}

/* quiz-only lesson stage */
.mtl-qstage{position:relative;display:flex;align-items:flex-end;min-height:220px;padding:28px;border-radius:var(--mtl-r-lg);border-top-left-radius:140px;overflow:hidden;color:#fff;isolation:isolate}
.mtl-qstage img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;translate:0 calc(var(--sy,0) * .6px)}
.mtl-qstage::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(200deg,rgba(39,84,126,.15),rgba(39,84,126,.78))}
.mtl-qstage__facts{display:flex;flex-wrap:wrap;gap:8px}
@container mtl (max-width:639px){.mtl-qstage{min-height:170px;border-top-left-radius:80px;padding:20px}}

/* course complete */
.mtl-done{position:relative;display:grid;grid-template-columns:minmax(0,1fr);gap:40px;padding:48px;border-radius:28px;background:linear-gradient(160deg,#FFFFFF 0%,#F1FBFA 60%,#E5F6F5 100%);border:1px solid #D6EEEC;box-shadow:var(--mtl-shadow);overflow:hidden;animation:mtl-rise .8s var(--mtl-ease)}
.mtl-done::before{content:"";position:absolute;inset-block-start:-200px;inset-inline-start:-160px;width:520px;height:520px;border-radius:50%;background:radial-gradient(closest-side,rgba(201,246,248,.9),rgba(201,246,248,0));animation:mtl-breathe 10s var(--mtl-ease-breath) infinite alternate;pointer-events:none}
@container mtl (min-width:1000px){.mtl-done{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:center}}
.mtl-done__text{position:relative;display:grid;justify-items:start;gap:12px}
.mtl-done__mark{position:relative;width:84px;height:84px;border-radius:50%;display:grid;place-items:center;background:var(--mtl-teal);color:#fff;box-shadow:0 18px 36px -18px rgba(33,183,177,.9);margin-bottom:8px}
.mtl-done__mark::before,.mtl-done__mark::after{content:"";position:absolute;inset:0;border-radius:50%;border:1.5px solid rgba(33,183,177,.45);animation:mtl-ripple 2.6s var(--mtl-ease) infinite}
.mtl-done__mark::after{animation-delay:1.3s}
.mtl-done__mark .mtl-i{width:38px;height:38px;stroke-width:2.2;stroke-dasharray:24;animation:mtl-draw24 .8s var(--mtl-ease) .3s both}
.mtl .mtl-done__title{font-size:clamp(2rem,1.4rem + 1.6vw,2.8rem);font-weight:800;line-height:1.2;color:var(--mtl-primary)}
.mtl .mtl-done__lead{font-size:1.1rem;line-height:1.8;max-width:40ch}
.mtl-done__facts{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.mtl-done__actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
/* certificate preview (design only) */
.mtl-cert{position:relative;aspect-ratio:1.414/1;padding:7%;border-radius:18px;background:#fff;box-shadow:0 40px 70px -40px rgba(18,48,71,.5),0 0 0 1px #E3ECEC;display:grid;align-content:space-between;rotate:-2deg;translate:calc(var(--mx,0) * -8px) calc(var(--my,0) * -6px);transition:rotate .8s var(--mtl-ease);overflow:hidden}
.mtl-cert:hover{rotate:0deg}
.mtl-cert::before{content:"";position:absolute;inset:12px;border:1px solid #D9ECEB;border-radius:12px;border-top-left-radius:72px;pointer-events:none}
.mtl-cert::after{content:"";position:absolute;width:60%;aspect-ratio:1;inset-block-end:-30%;inset-inline-start:-14%;border-radius:50%;background:radial-gradient(closest-side,rgba(33,183,177,.14),rgba(33,183,177,0));pointer-events:none}
.mtl-cert__top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.mtl-cert__brand{font-weight:800;color:var(--mtl-primary);font-size:clamp(.9rem,.6rem + .8vw,1.2rem)}
.mtl-cert__brand span{color:var(--mtl-teal-deep)}
.mtl-cert__mid{display:grid;gap:4px}
.mtl-cert__mid small{font-size:clamp(.7rem,.5rem + .5vw,.85rem);color:var(--mtl-text)}
.mtl-cert__name{font-size:clamp(1.3rem,.8rem + 1.6vw,2.2rem);font-weight:800;color:var(--mtl-value);line-height:1.3}
.mtl-cert__course{font-size:clamp(.85rem,.6rem + .7vw,1.1rem);font-weight:700;color:var(--mtl-teal-deep)}
.mtl-cert__foot{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;font-size:clamp(.65rem,.5rem + .4vw,.8rem);color:var(--mtl-text)}
.mtl-cert__seal{width:clamp(40px,8cqi,64px);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;background:var(--mtl-mist-2);color:var(--mtl-teal-deep);box-shadow:0 0 0 6px rgba(33,183,177,.08)}
.mtl-cert__seal .mtl-i{width:55%;height:55%}
.mtl-cert__ribbon{position:absolute;inset-block-start:14px;inset-inline-end:14px;z-index:2}
@container mtl (max-width:639px){.mtl-done{padding:28px 20px;gap:28px;border-radius:24px}.mtl-cert{rotate:0deg}}

/* mobile learn dock */
.mtl-dock{position:fixed;z-index:9970;inset-inline:10px;inset-block-end:calc(10px + env(safe-area-inset-bottom));display:none;align-items:center;gap:8px;padding:8px;border-radius:22px;background:rgba(255,255,255,.9);border:1px solid var(--mtl-glass-line);box-shadow:0 20px 40px -18px rgba(18,40,58,.45),inset 0 1px 0 #fff;backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%)}
@media (max-width:879px){.mtl-dock{display:flex}}
@media (min-width:640px) and (max-width:879px){.mtl-dock{inset-inline:auto;left:50%;translate:-50% 0;width:560px}}
.mtl .mtl-dock__btn{flex:none;width:48px;height:48px;border-radius:16px;border:0;display:grid;place-items:center;background:var(--mtl-mist);color:var(--mtl-ink);cursor:pointer;transition:background var(--mtl-t-fast),color var(--mtl-t-fast)}
.mtl .mtl-dock__btn:disabled{opacity:.4;cursor:default}
.mtl .mtl-dock__menu{flex:1;min-width:0;display:flex;align-items:center;gap:10px;height:48px;padding:0 14px;border:0;border-radius:16px;background:transparent;color:var(--mtl-value);font:inherit;font-weight:700;font-size:.95rem;cursor:pointer;text-align:start}
.mtl-dock__menu .mtl-i{color:var(--mtl-teal-deep)}
.mtl-dock__menu span{flex:1;min-width:0;display:grid}
.mtl-dock__menu small{font-weight:500;font-size:.76rem;color:var(--mtl-text)}
.mtl .mtl-dock__next{flex:none;height:48px;padding:0 18px;border-radius:16px;font-size:.95rem}
.mtl .mtl-dock__next.is-locked{border-radius:16px}
.mtl-dock__hint{position:absolute;inset-inline:6px;inset-block-end:calc(100% + 10px);display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:16px;background:var(--mtl-primary);color:#fff;font-size:.9rem;line-height:1.6;box-shadow:0 14px 30px -14px rgba(39,84,126,.7);animation:mtl-rise .35s var(--mtl-ease)}
.mtl-dock__hint .mtl-i{color:var(--mtl-aqua);margin-top:2px}

/* ---------- motion safety + coarse pointers ---------- */
@media (prefers-reduced-motion:reduce){
  .mtl *,.mtl *::before,.mtl *::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;animation-delay:0s !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .mtl-atmos i,.mtl-frame__media,.mtl-frame__orbit,.mtl-dot,.mtl-breath,.mtl-hero__inset,.mtl-hero__round,.mtl-cert{translate:none !important}
  .mtl-js [data-reveal]{opacity:1;translate:none;clip-path:none}
}
@media (pointer:coarse){
  .mtl-atmos i{animation:none}
  .mtl-frame__light{animation:none;opacity:.6}
}

/* reading lesson content written in the dashboard */
.mtl-read__content{display:grid;gap:14px;font-size:1.08rem;line-height:2;color:var(--mtl-value)}
.mtl-read__content :where(h2,h3,h4){margin:8px 0 0;color:var(--mtl-primary);font-weight:700;line-height:1.4}
.mtl-read__content :where(ul,ol){list-style:revert;padding-inline-start:1.4em;display:grid;gap:6px}
.mtl-read__content a{font-weight:700}
.mtl-read__content img{border-radius:var(--mtl-r-md)}