:root{
  --bg:#06100d;
  --bg-2:#0a1512;
  --surface:#0d1915;
  --surface-2:#101e19;
  --surface-3:#13241e;
  --text:#f4faf7;
  --muted:#a9b9b2;
  --muted-2:#778a82;
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.15);
  --accent:#19c978;
  --accent-2:#42e79a;
  --accent-soft:rgba(25,201,120,.12);
  --danger:#ff6b6b;
  --shadow:0 18px 55px rgba(0,0,0,.20);
  --radius:22px;
  --radius-sm:14px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

html.light-theme,html[data-theme="light"]{
  --bg:#f2f6f3;
  --bg-2:#edf3ef;
  --surface:#ffffff;
  --surface-2:#f8faf9;
  --surface-3:#f1f6f3;
  --text:#101915;
  --muted:#596861;
  --muted-2:#7b8882;
  --border:rgba(15,31,24,.10);
  --border-strong:rgba(15,31,24,.16);
  --accent:#10b96c;
  --accent-2:#17ce7a;
  --accent-soft:rgba(16,185,108,.10);
  --shadow:0 18px 50px rgba(37,64,51,.10);
}

*{box-sizing:border-box}
html{scrollbar-gutter:stable;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  background:var(--bg);
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.sheet-open,
body.info-modal-open{overflow:hidden}
button,input{font:inherit}
button{color:inherit}
a{color:inherit;text-decoration:none}
button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid rgba(25,201,120,.35);outline-offset:2px}

/* Lightweight decorative background. No animated blur layers. */
.mock-bg{
  position:fixed;
  inset:0;
  z-index:-2;
  overflow:hidden;
  pointer-events:none;
  background:
    radial-gradient(700px 520px at 8% 14%,rgba(25,201,120,.15),transparent 68%),
    radial-gradient(640px 480px at 92% 18%,rgba(86,213,181,.11),transparent 70%),
    radial-gradient(760px 520px at 50% 100%,rgba(43,137,106,.08),transparent 72%),
    var(--bg);
}
.mock-bg-glow,.mock-shape,.ambient,.grain,.side-art{display:none!important}
.mock-bg-lines{position:absolute;inset:0;width:100%;height:100%;opacity:.22}
.mock-line-glow{display:none}
.mock-line-sharp{fill:none;stroke:rgba(53,211,146,.22);stroke-width:1.2}
.mock-line{fill:none;stroke:rgba(80,225,169,.20);stroke-width:1.4}
.mock-line.line-2,.mock-line.line-4{stroke:rgba(122,216,255,.12)}

.shell{width:min(1180px,calc(100% - 36px));margin:0 auto;padding:18px 0 56px}

/* Header */
.topbar{
  min-height:66px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:10px 16px 10px 18px;
  border:1px solid var(--border);
  border-radius:18px;
  background:color-mix(in srgb,var(--surface) 94%,transparent);
  box-shadow:0 10px 30px rgba(0,0,0,.06);
}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
.brand>span:last-of-type{font-size:17px}
.brand>span:last-of-type span{color:var(--accent)}
.brand b{font-size:10px;color:var(--muted-2);font-weight:700;margin-left:2px}
.brand-mark{display:grid;place-items:center;width:28px;height:28px;color:var(--accent)}
.brand-mark svg{width:26px;height:22px;fill:none;stroke:currentColor;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.main-nav{display:flex;align-items:center;gap:30px;margin-left:auto;margin-right:auto}
.main-nav a{font-size:13px;font-weight:600;color:var(--muted);transition:color .16s ease}
.main-nav a:hover{color:var(--text)}
.top-actions{display:flex;align-items:center;gap:10px}
.heart-btn,.theme-toggle{border:1px solid var(--border);background:var(--surface-2);cursor:pointer}
.heart-btn{height:36px;padding:0 12px;border-radius:11px;color:var(--text);display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px;font-weight:700;transition:background .16s ease,border-color .16s ease,transform .16s ease}
.heart-btn-icon{color:#ff7180;font-size:17px;line-height:1}
.heart-btn-label{line-height:1}
.heart-btn:hover{background:var(--surface-3);border-color:var(--border-strong);transform:translateY(-1px)}
.theme-toggle{height:36px;padding:0 8px;border-radius:999px;display:flex;align-items:center;gap:5px}
.theme-toggle-side{font-size:13px;color:var(--muted-2);line-height:1}
.theme-toggle-track{position:relative;width:38px;height:22px;border-radius:999px;background:var(--accent-soft);border:1px solid var(--border-strong)}
.theme-toggle-thumb{position:absolute;top:3px;left:3px;width:14px;height:14px;border-radius:50%;background:var(--accent);box-shadow:0 2px 5px rgba(0,0,0,.16);transition:transform .18s var(--ease)}
html.light-theme .theme-toggle-thumb,html[data-theme="light"] .theme-toggle-thumb{transform:translateX(16px)}

/* Hero */
.hero{padding:72px 0 0}
.hero-copy{max-width:840px;margin:0 auto 28px;text-align:center}
.eyebrow,.section-kicker{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--accent)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;border-radius:999px;background:var(--accent-soft)}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--accent)}
h1{margin:18px 0 14px;font-size:clamp(44px,7vw,78px);line-height:.98;letter-spacing:-.065em;font-weight:800}
h1 span{color:var(--accent)}
.subtitle{margin:0;color:var(--muted);font-size:16px;line-height:1.65}

.converter{
  width:min(880px,100%);
  margin:0 auto;
  padding:22px;
  border:1px solid var(--border-strong);
  border-radius:26px;
  background:var(--surface);
  box-shadow:var(--shadow);
}
.field-label-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:10px}
.field-label-row label{font-size:12px;font-weight:700;color:var(--muted)}
.paste-btn{height:36px;padding:0 13px;border:1px solid var(--border);border-radius:11px;background:var(--surface-2);font-size:12px;font-weight:700;cursor:pointer}
.paste-btn:hover{border-color:var(--border-strong);background:var(--surface-3)}
.input-wrap{position:relative;display:flex;align-items:center;border:1px solid var(--border-strong);border-radius:15px;background:var(--surface-2);transition:border-color .16s ease,box-shadow .16s ease}
.input-wrap.recognized{border-color:rgba(25,201,120,.45);box-shadow:0 0 0 3px var(--accent-soft)}
.link-icon{width:42px;text-align:center;color:var(--accent);font-weight:700}
#url{width:100%;height:54px;border:0;outline:0;background:transparent;color:var(--text);font-size:14px;padding:0 44px 0 0}
#url::placeholder{color:var(--muted-2)}
.clear{position:absolute;right:10px;width:30px;height:30px;border:0;border-radius:9px;background:transparent;color:var(--muted);font-size:22px;line-height:1;cursor:pointer;opacity:0;pointer-events:none}
.clear.visible{opacity:1;pointer-events:auto}
.clear:hover{background:var(--surface-3);color:var(--text)}

.video-preview{display:flex;align-items:center;gap:14px;margin-top:14px;padding:10px;border:1px solid var(--border);border-radius:15px;background:var(--surface-2)}
.video-preview[hidden],.result-card[hidden]{display:none}
.video-preview img{width:110px;height:62px;object-fit:cover;border-radius:10px;background:var(--surface-3)}
.preview-info{display:grid;gap:4px;min-width:0}
.preview-info strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.preview-info small{font-size:11px;color:var(--muted)}

.conversion-settings{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.setting-card{min-width:0;display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--border);border-radius:15px;background:var(--surface-2);text-align:left;cursor:pointer;transition:border-color .16s ease,background .16s ease,transform .16s ease}
.setting-card:hover{border-color:var(--border-strong);background:var(--surface-3);transform:translateY(-1px)}
.setting-card-icon{flex:0 0 34px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-weight:800}
.setting-card-copy{display:grid;gap:3px;min-width:0;flex:1}
.setting-card-copy small{font-size:10px;color:var(--muted-2)}
.setting-card-copy strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.setting-chevron{font-size:22px;color:var(--muted-2)}

.quality-option{position:relative;display:flex;align-items:center;justify-content:center;min-height:48px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2);cursor:pointer}
.quality-option input{position:absolute;opacity:0;pointer-events:none}
.quality-option>span{display:flex;align-items:baseline;gap:3px}
.quality-option b{font-size:13px}.quality-option small{font-size:10px;color:var(--muted)}
.quality-option em{position:absolute;right:6px;top:5px;font-size:7px;font-style:normal;font-weight:800;color:var(--accent)}
.quality-option.selected{border-color:rgba(25,201,120,.45);background:var(--accent-soft);color:var(--accent)}

.download-btn{position:relative;display:flex;align-items:center;justify-content:center;width:100%;height:58px;margin-top:14px;border:0;border-radius:15px;background:var(--accent);color:#04140c;font-weight:800;cursor:pointer;overflow:hidden;transition:transform .16s ease,filter .16s ease,opacity .16s ease}
.download-btn:hover:not(:disabled){transform:translateY(-1px);filter:brightness(1.04)}
.download-btn:disabled{cursor:wait;opacity:.75}
.btn-content{position:relative;z-index:2;display:flex;align-items:center;gap:9px}.download-icon{font-size:22px}.btn-label{font-size:15px}
.btn-shine{position:absolute;inset:0;transform:translateX(-105%);background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.30) 50%,transparent 70%);transition:transform .45s ease}
.download-btn:hover .btn-shine{transform:translateX(105%)}
.progress-line{position:absolute;left:0;bottom:0;width:0;height:3px;background:rgba(255,255,255,.6)}
.download-btn.loading .progress-line{width:100%;transition:width 12s linear}
.download-btn.success{background:#2ad786}.download-btn.error{background:#ff7272}
.status{min-height:20px;margin-top:10px;text-align:center;font-size:11px;color:var(--muted-2)}
.status.recognized-status{color:var(--accent)}
.status.active{color:var(--accent)}
.status.error{color:var(--danger)}

.result-card{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;margin-top:12px;padding:12px;border:1px solid rgba(25,201,120,.30);border-radius:15px;background:var(--accent-soft)}
.result-pop{animation:resultPop .18s ease-out}
@keyframes resultPop{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.result-cover{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--surface);color:var(--accent);font-size:20px}
.result-info{display:grid;gap:3px;min-width:0}.result-kicker{font-size:8px;font-weight:800;color:var(--accent);letter-spacing:.12em}.result-info strong{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.result-info small{font-size:10px;color:var(--muted)}
.result-download{height:36px;padding:0 12px;border:1px solid var(--border);border-radius:10px;background:var(--surface);font-size:11px;font-weight:800;cursor:pointer}

.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:22px}
.feature-item{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--border);border-radius:15px;background:var(--surface)}
.feature-icon{flex:0 0 34px;width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:800}
.feature-text{display:grid;gap:3px}.feature-text strong{font-size:11px}.feature-text small{font-size:10px;color:var(--muted)}

/* Lower content */
.workflow-strip,.service-showcase{margin-top:70px}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:18px}
.section-heading h2{margin:7px 0 0;font-size:26px;letter-spacing:-.04em}
.section-heading p{max-width:390px;margin:0;color:var(--muted);font-size:12px;line-height:1.5;text-align:right}
.section-heading.compact h2{font-size:22px}
.workflow-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.workflow-step{position:relative;min-height:142px;padding:18px;border:1px solid var(--border);border-radius:18px;background:var(--surface);display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:start}
.workflow-number{font-size:20px;font-weight:800;color:var(--accent)}
.workflow-step strong,.workflow-step small{display:block}.workflow-step strong{font-size:13px;margin-bottom:7px}.workflow-step small{font-size:11px;line-height:1.5;color:var(--muted)}
.workflow-icon{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-weight:800}
.state-block,.format-section{margin-top:38px}
.state-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.state-card{min-height:185px;padding:16px;border:1px solid var(--border);border-radius:18px;background:var(--surface)}
.state-index{font-size:10px;color:var(--muted-2);font-weight:800}.state-card-head{display:flex;align-items:center;gap:8px;margin:16px 0}.state-card-head b{font-size:12px}.mini-status{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-weight:800}.mini-status.loading-dot{font-size:20px}.mini-file{display:flex;gap:9px;align-items:center}.mini-cover{width:42px;height:42px;border-radius:10px;background:var(--surface-3);display:grid;place-items:center;color:var(--accent)}.mini-file b,.mini-file small{display:block}.mini-file b{font-size:11px}.mini-file small{margin-top:3px;color:var(--muted);font-size:10px}.state-caption{display:block;margin-top:18px;color:var(--muted);font-size:10px}.fake-progress{height:6px;border-radius:999px;background:var(--surface-3);overflow:hidden;margin-top:24px}.fake-progress span{display:block;width:66%;height:100%;background:var(--accent)}
.mini-download{margin-top:22px;height:38px;border-radius:10px;background:var(--accent);color:#06140d;display:grid;place-items:center;font-size:11px;font-weight:800}.mini-download.secondary{background:var(--surface-3);color:var(--text);border:1px solid var(--border)}
.format-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.format-feature{padding:17px;border:1px solid var(--border);border-radius:16px;background:var(--surface);text-align:center}.format-feature>span{display:grid;place-items:center;width:36px;height:36px;margin:0 auto 10px;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:800}.format-feature b,.format-feature small{display:block}.format-feature b{font-size:12px}.format-feature small{margin-top:4px;color:var(--muted);font-size:9px}
.why-section{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:22px}.why-card{display:flex;align-items:center;gap:10px;min-height:78px;padding:13px;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.why-icon{width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:800}.why-icon.heart{color:#ff7180;background:rgba(255,113,128,.10)}.why-card b,.why-card small{display:block}.why-card b{font-size:11px}.why-card small{margin-top:3px;font-size:9px;color:var(--muted);line-height:1.4}.support-teaser{grid-column:span 1}.why-action{margin-left:auto;flex:0 0 auto}

/* Desktop dialogs/sheets. Opening stays subtle; closing is instant. */
.mobile-sheet{visibility:hidden;pointer-events:none;position:fixed;inset:0;z-index:1000}
.mobile-sheet.open{visibility:visible;pointer-events:auto}
.sheet-backdrop{position:absolute;inset:0;opacity:0;background:rgba(4,10,8,.42);backdrop-filter:blur(7px);-webkit-backdrop-filter:blur(7px);transition:opacity .18s linear}
.mobile-sheet.open .sheet-backdrop{opacity:1}

.sheet-panel{position:absolute;left:50%;top:50%;width:min(560px,calc(100% - 28px));max-height:min(760px,calc(100vh - 32px));overflow:auto;transform:translate(-50%,-46%) scale(.985);padding:20px;border:1px solid var(--border-strong);border-radius:22px;background:var(--surface);box-shadow:0 28px 80px rgba(0,0,0,.28);transition:transform .18s var(--ease);will-change:transform}
.mobile-sheet.open .sheet-panel{transform:translate(-50%,-50%) scale(1)}
.sheet-handle{display:none}.sheet-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:16px}.sheet-head h2{margin:0;font-size:22px;letter-spacing:-.04em}.sheet-head p{margin:5px 0 0;color:var(--muted);font-size:11px}.sheet-close,.info-modal-close{width:34px;height:34px;border:1px solid var(--border);border-radius:10px;background:var(--surface-2);font-size:22px;line-height:1;cursor:pointer}.format-list,.quality-sheet-list,.advanced-list{display:grid;gap:8px}.format-option,.quality-sheet-option,.advanced-row{width:100%;display:flex;align-items:center;gap:12px;padding:13px;border:1px solid var(--border);border-radius:13px;background:var(--surface-2);text-align:left}.format-option,.quality-sheet-option{cursor:pointer}.format-option>span:nth-child(2),.quality-sheet-option>span{display:grid;gap:3px;min-width:0;flex:1}.format-option b,.quality-sheet-option b,.advanced-row b{font-size:12px}.format-option small,.quality-sheet-option small,.advanced-row small{font-size:10px;color:var(--muted);line-height:1.4}.format-icon,.advanced-icon{width:32px;height:32px;display:grid;place-items:center;flex:0 0 32px;border-radius:9px;background:var(--accent-soft);color:var(--accent);font-weight:800}.format-option i,.quality-sheet-option i{font-style:normal;color:var(--muted-2)}.format-option.active,.quality-sheet-option.active{border-color:rgba(25,201,120,.48);background:var(--accent-soft)}.format-option.active i,.quality-sheet-option.active i{color:var(--accent)}.quality-sheet-option{position:relative}.quality-sheet-option em{font-size:8px;color:var(--accent);font-style:normal;font-weight:800}.coming-soon{margin-left:auto;font-size:8px;color:var(--muted-2);font-weight:800}
.advanced-tools{gap:10px}.advanced-tool{border:1px solid var(--border);border-radius:14px;background:var(--surface-2);overflow:hidden}.advanced-tool-head{width:100%;display:flex;align-items:center;gap:12px;padding:13px;border:0;background:none;color:inherit;text-align:left;cursor:pointer}.advanced-tool-head>span:nth-child(2){display:grid;gap:3px;min-width:0;flex:1}.advanced-tool-head i{font-style:normal;color:var(--muted-2);font-size:18px;transition:transform .18s ease}.advanced-tool.active .advanced-tool-head i{transform:rotate(45deg);color:var(--accent)}.advanced-tool-body{display:none;padding:0 13px 13px}.advanced-tool.active .advanced-tool-body{display:block}.tool-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}.tool-fields label,.range-field{display:grid;gap:6px}.tool-fields label>span,.range-field>span{font-size:10px;color:var(--muted)}.tool-input{width:100%;height:42px;border:1px solid var(--border-strong);border-radius:10px;background:var(--surface);color:var(--text);padding:0 11px;font:inherit;font-size:12px;outline:none}.tool-input:focus{border-color:rgba(25,201,120,.55);box-shadow:0 0 0 3px var(--accent-soft)}.tool-hint{display:block;margin:8px 0 0;color:var(--muted);font-size:10px;line-height:1.45}.range-field input{width:100%;accent-color:var(--accent)}.range-field strong{float:right;color:var(--text)}
.sheet-primary{width:100%;height:48px;margin-top:14px;border:0;border-radius:13px;background:var(--accent);color:#06140d;font-weight:800;cursor:pointer}

/* Information/support dialogs */
.info-modal{visibility:hidden;pointer-events:none;position:fixed;inset:0;z-index:1100}
.info-modal.open{visibility:visible;pointer-events:auto}
.info-modal-backdrop{position:absolute;inset:0;opacity:0;background:rgba(4,10,8,.42);backdrop-filter:blur(7px);-webkit-backdrop-filter:blur(7px);transition:opacity .18s linear}
.info-modal.open .info-modal-backdrop{opacity:1}

.info-modal-panel{position:absolute;left:50%;top:50%;width:min(620px,calc(100% - 28px));max-height:min(760px,calc(100vh - 32px));overflow:auto;transform:translate(-50%,-46%) scale(.985);padding:28px;border:1px solid var(--border-strong);border-radius:24px;background:var(--surface);box-shadow:0 28px 80px rgba(0,0,0,.28);transition:transform .18s var(--ease);will-change:transform}
.info-modal.open .info-modal-panel{transform:translate(-50%,-50%) scale(1)}
.info-modal-close{position:absolute;top:16px;right:16px}.info-modal-kicker{display:block;margin-bottom:8px;font-size:10px;font-weight:800;letter-spacing:.12em;color:var(--accent)}.info-modal-panel h2{margin:0 44px 12px 0;font-size:30px;letter-spacing:-.05em}.info-modal-panel p{color:var(--muted);font-size:13px;line-height:1.65}.info-modal-list{display:grid;gap:8px;margin-top:18px}.info-modal-list>div{display:grid;gap:4px;padding:13px;border:1px solid var(--border);border-radius:13px;background:var(--surface-2)}.info-modal-list b{font-size:12px}.info-modal-list span,.info-modal-steps span{font-size:11px;color:var(--muted);line-height:1.5}.info-modal-steps{display:grid;gap:12px;padding-left:20px}.info-modal-steps li{padding-left:5px}.info-modal-steps b{display:block;font-size:12px;margin-bottom:3px}.info-modal-note{padding:12px;border-radius:12px;background:var(--accent-soft);color:var(--muted)!important}.support-modal-content>p{max-width:540px}.support-cards{display:grid;gap:9px;margin-top:16px}.support-card{display:flex;gap:12px;padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--surface-2)}.support-card-icon{width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:800}.support-card b,.support-card small{display:block}.support-card b{font-size:12px}.support-card small{margin-top:4px;color:var(--muted);font-size:10px;line-height:1.5}.support-note{display:grid;gap:5px;margin-top:14px;padding:14px;border:1px dashed var(--border-strong);border-radius:14px}.support-note b{font-size:11px}.support-note span{font-size:10px;line-height:1.5;color:var(--muted)}


footer{display:flex;justify-content:space-between;gap:20px;margin-top:70px;padding-top:18px;border-top:1px solid var(--border);color:var(--muted-2);font-size:10px}

@media (max-width:900px){
  .shell{width:min(100% - 24px,720px)}
  .topbar{padding:9px 12px}.main-nav{gap:16px}
  .hero{padding-top:52px}.hero-copy{text-align:left}.hero-copy .eyebrow{margin-left:0}.hero-copy h1{font-size:clamp(42px,11vw,66px)}
  .feature-row{grid-template-columns:repeat(2,1fr)}
  .state-grid{grid-template-columns:repeat(2,1fr)}.why-section{grid-template-columns:repeat(2,1fr)}
  .format-grid{grid-template-columns:repeat(3,1fr)}
}

@media (max-width:640px){
  html{scroll-behavior:auto}
  .shell{width:calc(100% - 20px);padding-top:10px}
  .topbar{min-height:58px;border-radius:15px}.brand b,.main-nav{display:none}.top-actions{margin-left:auto}.heart-btn{display:grid;width:36px;height:34px;padding:0}.heart-btn-label{display:none}
  .theme-toggle{height:34px}.theme-toggle-track{width:36px;height:21px}.theme-toggle-thumb{width:13px;height:13px;top:3px;left:3px}html.light-theme .theme-toggle-thumb,html[data-theme="light"] .theme-toggle-thumb{transform:translateX(15px)}
  .hero{padding-top:38px}.hero-copy{margin-bottom:20px}.eyebrow{font-size:9px;padding:6px 9px}.hero-copy h1{font-size:44px;line-height:1.02;margin:14px 0 12px}.subtitle{font-size:13px;line-height:1.55}.desktop-only{display:none}
  .converter{padding:14px;border-radius:20px}.field-label-row label{font-size:10px}.paste-btn{height:34px;padding:0 10px;font-size:10px}.input-wrap{border-radius:13px}#url{height:50px;font-size:13px}.link-icon{width:36px}.video-preview{margin-top:10px}.video-preview img{width:88px;height:50px}.preview-info strong{font-size:11px}
  .conversion-settings{grid-template-columns:1fr 1fr;gap:8px}.setting-card{padding:10px;border-radius:12px}.setting-card:last-child{grid-column:1/-1}.setting-card-icon{width:30px;height:30px;flex-basis:30px}.setting-card-copy small{font-size:9px}.setting-card-copy strong{font-size:12px}  .download-btn{height:54px;border-radius:13px}.btn-label{font-size:14px}.status{font-size:10px}
  .result-card{grid-template-columns:auto 1fr}.result-download{grid-column:1/-1;width:100%}
  .feature-row{grid-template-columns:1fr 1fr;margin-top:14px}.feature-item{padding:10px}.feature-text strong{font-size:10px}.feature-text small{font-size:9px}
  .workflow-strip,.service-showcase{margin-top:48px}.section-heading{display:block;margin-bottom:14px}.section-heading h2,.section-heading.compact h2{font-size:21px}.section-heading p{text-align:left;margin-top:7px;font-size:11px}
  .workflow-steps{grid-template-columns:1fr}.workflow-step{min-height:110px}
  .state-grid{grid-template-columns:1fr 1fr}.state-card{min-height:165px;padding:13px}.state-card-head{margin:12px 0}.state-card-head b{font-size:10px}.state-caption{font-size:9px}.fake-progress{margin-top:18px}
  .format-grid{grid-template-columns:repeat(2,1fr)}.format-feature:last-child{grid-column:1/-1}
  .why-section{grid-template-columns:1fr}.why-card{min-height:70px}.support-teaser{grid-column:auto}
  footer{display:grid;margin-top:48px}
  .mock-bg-lines{display:none}

  /* Mobile sheets stay opaque and animation-free for Safari performance. */
  .mobile-sheet{visibility:hidden;opacity:1;transition:none}.mobile-sheet.open{visibility:visible;opacity:1}
  .sheet-backdrop{opacity:1;background:rgba(4,10,8,.44);backdrop-filter:none;-webkit-backdrop-filter:none;transition:none}
  .sheet-panel{left:0;right:0;bottom:0;top:auto;width:100%;max-height:88vh;transform:none;padding:12px 14px 18px;border-radius:22px 22px 0 0;box-shadow:0 -16px 50px rgba(0,0,0,.18);transition:none}.mobile-sheet.open .sheet-panel{transform:none}
  .sheet-handle{display:block;width:38px;height:4px;margin:0 auto 14px;border-radius:999px;background:var(--border-strong)}
  .sheet-head{margin-bottom:12px}.sheet-head h2{font-size:20px}.sheet-close{width:32px;height:32px}
  .format-option,.quality-sheet-option,.advanced-row{padding:11px;border-radius:12px}.format-icon,.advanced-icon{width:30px;height:30px;flex-basis:30px}.format-option b,.quality-sheet-option b,.advanced-row b{font-size:11px}.format-option small,.quality-sheet-option small,.advanced-row small{font-size:9px}.sheet-primary{height:46px}
  .info-modal{visibility:hidden;opacity:1;transition:none}.info-modal.open{visibility:visible;opacity:1}.info-modal-backdrop{opacity:1;backdrop-filter:none;-webkit-backdrop-filter:none;transition:none}.info-modal-panel{bottom:0;top:auto;left:0;width:100%;max-height:90vh;transform:none;border-radius:22px 22px 0 0;padding:22px 16px 24px;transition:none}.info-modal.open .info-modal-panel{transform:none}.info-modal-panel h2{font-size:26px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}