/* ==========================================================================
   Audio2Time — dark studio theme
   Fonts: Space Grotesk (display, variable) + Inter (UI, variable), self-hosted
   ========================================================================== */
@font-face {
  font-family: "Inter";
  src: url("fonts/inter-var-latin.woff2") format("woff2");
  font-weight: 100 900; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Space Grotesk";
  src: url("fonts/space-grotesk-var-latin.woff2") format("woff2");
  font-weight: 300 700; font-style: normal; font-display: swap;
}

:root {
  --bg: #0a0c10;
  --bg2: #0e1117;
  --card: #12151c;
  --card2: #171b24;
  --border: #242a36;
  --text: #e8ebf2;
  --muted: #98a2b3;
  --accent: #34d399;
  --accent2: #22d3ee;
  --accent-ink: #062b1f;
  --warn: #fbbf24;
  --hot: #fb923c;
  --bad: #f87171;
  --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { color-scheme: dark; }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(1100px 500px at 70% -10%, rgba(34, 211, 238, .07), transparent 60%),
    radial-gradient(900px 500px at 10% -10%, rgba(52, 211, 153, .08), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex; flex-direction: column;
  font-size: 15.5px; line-height: 1.55;
}
.wrap { width: 100%; max-width: 860px; margin: 0 auto; padding: 40px 20px 60px; flex: 1; }
.hidden { display: none !important; }

/* ---- header ---- */
.top { margin-bottom: 34px; }
.brand { display: flex; align-items: center; gap: 11px; margin-bottom: 34px; }
.mark { flex: none; }
.wordmark {
  font-family: "Space Grotesk", sans-serif; font-weight: 700; font-size: 22px;
  letter-spacing: -.02em;
}
.wordmark em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
h1 {
  font-family: "Space Grotesk", sans-serif; font-weight: 700;
  font-size: clamp(32px, 5.4vw, 46px); letter-spacing: -.03em; line-height: 1.08;
  margin-bottom: 16px;
}
.grad {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sub { color: var(--muted); max-width: 640px; }
.sub b { color: var(--text); font-weight: 600; }
.feat-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.feat {
  font-size: 13px; color: var(--muted); background: var(--card);
  border: 1px solid var(--border); border-radius: 99px; padding: 5px 13px;
}

/* ---- cards ---- */
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px; margin-bottom: 18px;
}
.section-title {
  font-family: "Space Grotesk", sans-serif; font-weight: 500; font-size: 13px;
  text-transform: uppercase; letter-spacing: .14em; color: var(--muted); margin-bottom: 16px;
}

/* ---- upload ---- */
.drop {
  border: 1.5px dashed var(--border); border-radius: 12px; padding: 38px 20px;
  text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: rgba(52, 211, 153, .05); }
.drop .big { font-weight: 600; margin-top: 10px; }
.drop .small { color: var(--muted); font-size: 13.5px; margin-top: 4px; }
.drop .fname {
  margin-top: 14px; font-size: 14px; color: var(--accent);
  font-variant-numeric: tabular-nums;
}
#file { display: none; }

/* ---- analysis KPIs ---- */
.stats-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.kpi {
  flex: 1 1 130px; background: var(--card2); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px;
}
.kpi .v { font-family: "Space Grotesk", sans-serif; font-weight: 700; font-size: 19px; font-variant-numeric: tabular-nums; }
.kpi .l { color: var(--muted); font-size: 12.5px; margin-top: 2px; }

/* ---- options ---- */
.opts { display: flex; flex-wrap: wrap; gap: 20px; }
.opt { flex: 1 1 260px; }
.opt label { display: block; font-weight: 600; font-size: 14.5px; margin-bottom: 8px; }
.opt-hint { color: var(--muted); font-weight: 400; font-size: 13px; }
select, .numbox {
  width: 100%; background: var(--bg2); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px; padding: 9px 12px;
  font: inherit; font-size: 14.5px;
}
select:focus, .numbox:focus, input[type=range]:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.numbox { max-width: 90px; font-variant-numeric: tabular-nums; }
.numbox.small { max-width: 80px; }
.hint { color: var(--muted); font-size: 13.5px; }

/* ---- presets & slider ---- */
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.chip {
  border: 1px solid var(--border); background: var(--bg2); border-radius: 99px;
  padding: 6px 16px; font-size: 14px; cursor: pointer; user-select: none;
  font-variant-numeric: tabular-nums; transition: all .12s;
}
.chip:hover { border-color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.chip .x { margin-left: 8px; color: var(--muted); font-weight: 600; cursor: pointer; }
.chip .x:hover { color: var(--bad); }
.chip.on .x { color: var(--accent-ink); opacity: .65; }
.chip.on .x:hover { opacity: 1; }
.slider-row { display: flex; align-items: center; gap: 14px; }
input[type=range] { flex: 1; accent-color: var(--accent); height: 4px; }

/* ---- tempo feedback line ---- */
.tempo-line {
  margin-top: 14px; font-size: 14px; padding: 10px 14px; border-radius: 9px;
  background: var(--card2); border: 1px solid var(--border); color: var(--muted);
}
.tempo-line.ok   { border-color: rgba(52,211,153,.4); color: #86efac; }
.tempo-line.warn { border-color: rgba(251,191,36,.4); color: var(--warn); }
.tempo-line.hot  { border-color: rgba(251,146,60,.45); color: var(--hot); }
.tempo-line.bad  { border-color: rgba(248,113,113,.5); color: var(--bad); }

/* ---- word cutting ---- */
.words {
  margin-top: 12px; background: var(--bg2); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 16px; line-height: 2.05; max-height: 260px; overflow-y: auto;
}
.word {
  cursor: pointer; border-radius: 6px; padding: 2px 5px; transition: background .1s;
}
.word:hover { background: rgba(248, 113, 113, .18); }
.word.cut { background: rgba(248, 113, 113, .28); color: var(--bad); text-decoration: line-through; }

/* ---- advanced ---- */
.adv { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 14px; }
.adv summary { cursor: pointer; color: var(--muted); font-size: 14px; user-select: none; }
.adv .inner { margin-top: 12px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.adv .inner b { color: var(--text); font-variant-numeric: tabular-nums; }

/* ---- buttons ---- */
.btn {
  font: inherit; font-weight: 600; font-size: 15.5px; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #2dd4bf); color: var(--accent-ink);
  border-radius: 10px; padding: .75em 1.8em; transition: filter .12s, transform .05s;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: default; filter: none; }
.btn.ghost {
  background: transparent; color: var(--text); border: 1px solid var(--border);
}
.btn.ghost:hover { border-color: var(--accent); }
.btn.warnbtn { background: var(--hot); color: #331503; }
.btn-row { margin-top: 22px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

/* ---- confirm ---- */
.confirmbox {
  margin-top: 18px; border: 1px solid rgba(251,146,60,.5); background: rgba(251,146,60,.08);
  border-radius: 10px; padding: 16px 18px; font-size: 14.5px;
}
.confirmbox .btns { margin-top: 12px; display: flex; gap: 10px; flex-wrap: wrap; }

/* ---- progress ---- */
.pstate { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 14.5px; margin-bottom: 14px; }
.spin {
  width: 18px; height: 18px; border-radius: 50%; flex: none;
  border: 2.5px solid var(--border); border-top-color: var(--accent);
  animation: rot .8s linear infinite;
}
@keyframes rot { to { transform: rotate(360deg); } }
.bar { height: 8px; background: var(--bg2); border-radius: 99px; overflow: hidden; }
.bar i {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px; transition: width .5s ease;
}

/* ---- result ---- */
audio { width: 100%; margin-bottom: 14px; }
.dl-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.dl {
  display: inline-block; text-decoration: none; font-weight: 600; font-size: 14.5px;
  color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent), #2dd4bf);
  border-radius: 10px; padding: .7em 1.4em;
  transition: filter .12s, transform .05s;
}
.dl:hover { filter: brightness(1.08); }
.dl:active { transform: translateY(1px); }
.res-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.relink { display: inline-block; color: var(--muted); font-size: 14px; text-decoration: none; }
.relink:hover { color: var(--accent); text-decoration: underline; }

/* ---- error ---- */
.err { color: var(--bad); font-size: 14.5px; white-space: pre-wrap; }

/* ---- how it works ---- */
.how { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.how-item {
  flex: 1 1 220px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; color: var(--muted); font-size: 13.8px;
}
.how-item b {
  display: block; font-family: "Space Grotesk", sans-serif; color: var(--text);
  font-size: 14.5px; margin-bottom: 6px; letter-spacing: .01em;
}

/* ---- footer ---- */
footer.bar {
  border-top: 1px solid var(--border); padding: 18px 20px; text-align: center;
}
footer.bar .c { color: var(--muted); font-size: 13px; }

@media (max-width: 560px) {
  .wrap { padding: 26px 14px 40px; }
  .card { padding: 18px 16px; }
}