:root {
  --paper: #f6f8fb;
  --surface: #ffffff;
  --ink: #15203b;
  --muted: #56607a;
  --line: #d9dfea;
  --action: #15203b;
  --action-ink: #ffffff;
  --frame: #0d1426;
  --frame-ink: #c9d2e6;
  --caption: #ffd23f;
  --caption-ink: #111111;
  --focus: #2a62e8;
  --danger: #b42318;
  --ok: #1f7a4d;
  --radius-lg: 18px;
  --radius-sm: 8px;
  --font: 'Atkinson Hyperlegible', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1524;
    --surface: #161e33;
    --ink: #e8ecf5;
    --muted: #a3acc2;
    --line: #2a3450;
    --action: #e8ecf5;
    --action-ink: #0f1524;
    --frame: #070b16;
    --focus: #7aa2ff;
    --danger: #ff8a80;
    --ok: #6fd3a0;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
}

html[lang='hi'] body { --font: 'Atkinson Hyperlegible', 'Noto Sans Devanagari', system-ui, sans-serif; }
html[lang='ar'] body { --font: 'Noto Sans Arabic', 'Atkinson Hyperlegible', system-ui, sans-serif; line-height: 1.7; }

a { color: inherit; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

.skip {
  position: absolute; inset-inline-start: 8px; top: 8px; z-index: 10;
  background: var(--surface); padding: 8px 12px; border-radius: var(--radius-sm);
  clip-path: inset(50%); width: 1px; height: 1px; overflow: hidden; white-space: nowrap;
}
.skip:focus { clip-path: none; width: auto; height: auto; }

/* ---------- header ---------- */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex; align-items: center; gap: 24px; min-height: 64px; flex-wrap: wrap; padding-block: 8px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.15rem; text-decoration: none; letter-spacing: -0.01em;
}
.brand svg { flex: none; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; margin-inline-end: auto; }
.nav a {
  text-decoration: none; padding: 6px 12px; border-radius: 999px; color: var(--muted); font-size: 0.97rem;
}
.nav a:hover { color: var(--ink); background: var(--surface); }
.nav a[aria-current='page'] { color: var(--ink); background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); }
.lang-switch { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 0.95rem; }

select, input[type='number'], input[type='text'], input[type='url'], textarea {
  font: inherit; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 10px;
}
select { padding-inline-end: 28px; max-width: 100%; }

/* ---------- hero ---------- */
.hero { padding-block: 40px 56px; }
.hero .wrap { display: grid; gap: 40px; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: start; }
.hero-copy { padding-top: 12px; }
.hero h1 {
  font-size: clamp(2rem, 1.3rem + 2.6vw, 3.1rem);
  line-height: 1.08; letter-spacing: -0.025em; margin: 0 0 16px; max-width: 16ch;
}
.lede { color: var(--muted); font-size: 1.15rem; margin: 0 0 24px; max-width: 42ch; }
.promise { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.promise li { display: flex; gap: 10px; align-items: flex-start; }
.promise svg { flex: none; margin-top: 4px; color: var(--ok); }

/* ---------- tool ---------- */
.tool {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 16px;
}

.frame {
  position: relative; display: block; aspect-ratio: 16 / 9; width: 100%;
  background: var(--frame); color: var(--frame-ink); border-radius: 12px; overflow: hidden;
  cursor: pointer; transition: box-shadow 0.15s ease;
}
.frame.drag { box-shadow: 0 0 0 3px var(--caption); }
.frame input[type='file'] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.frame-inner {
  position: absolute; inset: 0; display: grid; place-content: center; justify-items: center;
  gap: 8px; padding: 16px 16px 64px; text-align: center; pointer-events: none;
}
.frame-title { font-size: 1.25rem; font-weight: 700; color: #fff; margin: 0; }
.frame-hint { font-size: 0.92rem; margin: 0; max-width: 40ch; }
.frame-button {
  display: inline-block; margin-top: 6px; background: #fff; color: var(--frame);
  border-radius: 999px; padding: 8px 18px; font-weight: 700; font-size: 0.97rem;
}
.frame:focus-within { box-shadow: 0 0 0 3px var(--focus); }
.frame.has-file .frame-hint { display: none; }
.file-name { font-size: 0.92rem; color: #fff; word-break: break-all; margin: 0; }

.caption {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%);
  max-width: calc(100% - 32px); width: max-content;
  background: var(--caption); color: var(--caption-ink);
  font-weight: 700; font-size: clamp(0.9rem, 0.8rem + 0.5vw, 1.1rem); line-height: 1.3;
  padding: 6px 12px; border-radius: 4px; text-align: center;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  pointer-events: none;
}

.link-row { display: flex; gap: 8px; align-items: end; margin-top: 16px; }
.link-field { flex: 1; min-width: 0; }
.link-field input { width: 100%; }
.link-row .btn { padding-block: 9px; }

.options { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); margin-top: 16px; }
.field { display: grid; gap: 6px; font-size: 0.93rem; color: var(--muted); }
.field select, .field input { width: 100%; }

.actions { display: flex; gap: 12px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.btn {
  font: inherit; font-weight: 700; border-radius: 999px; padding: 12px 22px; cursor: pointer;
  border: 1px solid transparent; background: var(--action); color: var(--action-ink);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-quiet { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-small { padding: 8px 14px; font-size: 0.93rem; }

.status { margin-top: 16px; display: grid; gap: 8px; }
.status p { margin: 0; }
progress { width: 100%; height: 8px; appearance: none; border: none; border-radius: 999px; background: var(--line); overflow: hidden; }
progress::-webkit-progress-bar { background: var(--line); }
progress::-webkit-progress-value { background: var(--ink); border-radius: 999px; }
progress::-moz-progress-bar { background: var(--ink); }
.device { font-size: 0.88rem; color: var(--muted); }
.error { margin: 16px 0 0; color: var(--danger); font-weight: 700; }
.warn { margin: 12px 0 0; padding: 10px 12px; border-radius: var(--radius-sm); background: color-mix(in srgb, var(--caption) 22%, transparent); font-size: 0.95rem; }

.results { margin-top: 20px; border-top: 1px solid var(--line); padding-top: 16px; }
.results-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.results-head h2 { font-size: 1.1rem; margin: 0; }
.downloads { display: flex; gap: 8px; flex-wrap: wrap; }
.cues { list-style: none; margin: 0; padding: 0; max-height: 420px; overflow: auto; display: grid; gap: 4px; }
.cues li { display: grid; grid-template-columns: 56px 1fr; gap: 8px; align-items: start; }
.cue-time { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.88rem; padding-top: 7px; }
.cues textarea {
  width: 100%; resize: vertical; border-color: transparent; background: transparent; padding: 6px 8px;
  field-sizing: content; min-height: 2.2em;
}
.cues textarea:hover { border-color: var(--line); }
.cues textarea:focus { border-color: var(--focus); background: var(--paper); }

/* ---------- converter ---------- */
.conv-grid { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; margin-top: 16px; }
.conv-grid textarea { width: 100%; min-height: 280px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.88rem; }
.conv-controls { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); align-items: end; }
.hint { font-size: 0.86rem; color: var(--muted); margin: 0; }
.stats { margin: 0; color: var(--ok); font-weight: 700; }
.stats.is-error { color: var(--danger); }
.file-btn { position: relative; overflow: hidden; display: inline-block; }
.file-btn input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ---------- sections ---------- */
.section { padding-block: 56px; border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); letter-spacing: -0.02em; margin: 0 0 24px; }
.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); }
.steps li { counter-increment: step; }
.steps li::before {
  content: counter(step); display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%;
  background: var(--caption); color: var(--caption-ink); font-weight: 700; margin-bottom: 12px;
}
.steps h3 { margin: 0 0 6px; font-size: 1.1rem; }
.steps p { margin: 0; color: var(--muted); max-width: 36ch; }

.prose { max-width: 68ch; }
.prose p { margin: 0 0 14px; }
.prose h2 { font-size: 1.3rem; margin: 28px 0 10px; letter-spacing: -0.01em; }
.prose a.btn { display: inline-block; text-decoration: none; }
.prose ul, .prose ol { padding-inline-start: 1.3em; margin: 0 0 14px; }
.prose li { margin-bottom: 6px; }
.prose .lede { margin-bottom: 24px; }
.crumbs { margin: 0 0 8px; color: var(--muted); font-size: 0.95rem; }
.prose .guide-steps { counter-reset: gs; list-style: none; padding: 0; }
.guide-steps li { counter-increment: gs; position: relative; padding-inline-start: 52px; margin-bottom: 18px; }
.guide-steps li::before { content: counter(gs); position: absolute; inset-inline-start: 0; top: 2px; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: var(--caption); color: var(--caption-ink); font-weight: 700; }
.guide-steps h2 { margin-top: 0; font-size: 1.15rem; }
.prose h1 { font-size: clamp(1.8rem, 1.3rem + 1.6vw, 2.5rem); line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 14px; }

.faq { max-width: 72ch; }
.faq details { border-bottom: 1px solid var(--line); padding-block: 4px; }
.faq summary { cursor: pointer; font-weight: 700; padding-block: 12px; list-style-position: outside; }
.faq details p { margin: 0 0 16px; color: var(--muted); }

.tool-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; max-width: 72ch; }
.tool-links a {
  display: grid; gap: 2px; padding: 16px 0; text-decoration: none; border-bottom: 1px solid var(--line);
}
.tool-links strong { font-size: 1.05rem; }
.tool-links span { color: var(--muted); }
.tool-links a:hover strong { text-decoration: underline; }

.lang-list { columns: 3 200px; padding: 0; list-style: none; margin: 0; }
.lang-list li { padding-block: 4px; }

.site-footer { border-top: 1px solid var(--line); padding-block: 32px 48px; color: var(--muted); font-size: 0.95rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; }
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 24px; }
  .hero { padding-block: 24px 40px; }
  .steps { grid-template-columns: 1fr; }
  .conv-grid { grid-template-columns: 1fr; }
  .nav { order: 3; width: 100%; margin-inline-end: 0; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .nav a { white-space: nowrap; }
}

@media (max-width: 480px) {
  .frame { aspect-ratio: 4 / 3; }
  .tool { padding: 12px; }
  .cues li { grid-template-columns: 48px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

.burn { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); }
.burn h2 { font-size: 1.1rem; margin: 0 0 4px; }
.burn-stage { display: none; margin-top: 16px; background: var(--frame); border-radius: 12px; overflow: hidden; }
.burn.has-preview .burn-stage { display: grid; place-items: center; }
.burn-stage canvas { display: block; max-width: 100%; max-height: 420px; width: auto; height: auto; }
.burn-status { margin: 12px 0 6px; font-weight: 700; }
.field .file-btn { justify-self: start; }
a.btn { text-decoration: none; display: inline-block; }

[hidden] { display: none !important; }