/* ============================================================================
   components.css — navbar, buttons, cards, metrics, table, audio player, footer.
   ============================================================================ */

/* ---- Navbar (sticky glass) ---- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem clamp(1.2rem, 4vw, 2rem);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  background: rgba(10, 10, 18, 0.55);
  border-bottom: 1px solid var(--border);
  /* load intro: drops in from above, de-blurs and fades (set .in on boot) */
  opacity: 0; transform: translateY(-14px); filter: blur(8px);
  transition: opacity 1.5s var(--ease), transform 1.5s var(--ease), filter 1.5s var(--ease),
              background var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.nav.in { opacity: 1; transform: translateY(0); filter: blur(0); }
.nav__brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-weight: 600; font-size: var(--fs-lg); }
.nav__brand .star { color: var(--orange); }
.nav__links { display: flex; align-items: center; gap: 1.6rem; }
.nav__links a { font-size: var(--fs-sm); color: var(--text-muted); transition: color var(--dur-fast) ease; }
.nav__links a:hover, .nav__links a.active { color: var(--text); }
.nav__right { display: flex; align-items: center; gap: 0.8rem; }
.lang-toggle { font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.08em; color: var(--text-muted); border: 1px solid var(--border); border-radius: var(--r-sm); padding: 0.35rem 0.55rem; }
.lang-toggle:hover { border-color: var(--border-hover); color: var(--text); }
.nav__burger { display: none; }

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.2rem; border-radius: var(--r-sm); font-size: var(--fs-sm); font-weight: 500; transition: all var(--dur-fast) ease; border: 1.5px solid transparent; }
.btn--primary { background: var(--text); color: #09090b; }
.btn--primary:hover { transform: translateY(-1px); box-shadow: var(--glow-orange); }
.btn--ghost { border-color: var(--border-hover); color: var(--text); background: rgba(255,255,255,0.02); }
.btn--ghost:hover { border-color: var(--violet); box-shadow: var(--glow-violet); }
.btn--accent { background: var(--violet); color: #fff; }
.btn--accent:hover { background: var(--magenta); transform: translateY(-1px); }

/* Square icon button (e.g. GitHub) — ratel-style bordered glyph */
.btn-icon { display: inline-grid; place-content: center; width: 42px; height: 42px; border: 1.5px solid var(--border-hover); border-radius: var(--r-sm); color: var(--text-muted); transition: all var(--dur-fast) ease; }
.btn-icon:hover { color: var(--text); border-color: var(--violet); box-shadow: var(--glow-violet); }

/* ---- Glass card ---- */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

/* ---- Hero ---- */
/* Flex column: the inner block grows to fill and centres its content, the cue is
   a normal-flow item below it. In flex flow items STACK and never overlap — when
   the viewport is short the hero simply grows past 100svh and the page scrolls,
   instead of elements piling on top of each other. */
.hero { min-height: 100svh; display: flex; flex-direction: column; text-align: center; padding-top: 6rem; }
.hero__inner { flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; width: 100%; }
.hero h1 { margin: 1.1rem 0 1.4rem; font-size: clamp(2.4rem, 6vw, 4.5rem); line-height: 1.05; font-weight: 400; }
.hero h1 .grad { font-weight: 700; background: linear-gradient(100deg, var(--violet), var(--magenta) 60%, var(--orange)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(1.2rem, 2.3vw, 1.7rem); color: var(--text-muted); max-width: 46ch; margin: 0 auto 2.2rem; }
.hero .cta { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }
.scrollcue { position: static; flex: 0 0 auto; padding-bottom: 1.5rem; font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.22em; color: var(--text-faint); text-align: center; opacity: 0; transition: opacity 0.8s var(--ease) 0.2s; }
.scrollcue.in { opacity: 1; }
.scrollcue span { display: block; margin-top: 0.4rem; animation: cuefloat 3.2s var(--ease) infinite; }

/* ---- Metrics stat cards ---- */
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1rem; }
.stat { padding: 1.6rem; }
.stat__num { font-family: var(--font-mono); font-size: var(--fs-2xl); font-weight: 600; letter-spacing: -0.02em; }
.stat__num .arrow { font-size: 0.5em; color: var(--orange); margin-left: 0.2em; }
.stat__label { color: var(--text-muted); font-size: var(--fs-sm); margin-top: 0.3rem; }

/* ---- Results table ---- */
.table-wrap { overflow-x: auto; border-radius: var(--r-lg); }
table.results { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
table.results th, table.results td { padding: 0.85rem 1rem; text-align: right; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.results th:first-child, table.results td:first-child { text-align: left; }
table.results thead th { font-family: var(--font-mono); font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); }
table.results td { font-family: var(--font-mono); }
table.results tr.sage td { color: var(--text); background: rgba(109,74,255,0.06); }
table.results tr.sage td:first-child { color: var(--orange); font-family: var(--font-body); font-weight: 600; }
table.results td.best { color: var(--magenta); }

/* ---- Audio comparison player ---- */
.player { padding: 1.6rem; }
.player__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.player__title { font-family: var(--font-display); font-weight: 600; }
.player__transport { display: flex; align-items: center; gap: 1rem; }
.player__play { width: 46px; height: 46px; border-radius: 50%; background: var(--violet); color: #fff; display: grid; place-content: center; transition: all var(--dur-fast) ease; }
.player__play:hover { background: var(--magenta); }
.player__time { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-muted); }
.player__wave { width: 100%; height: 84px; margin: 0.6rem 0 1rem; cursor: pointer; }
.player__seek { width: 100%; accent-color: var(--violet); }
.model-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 0.7rem; margin-top: 1.1rem; }
.model-tab { padding: 0.8rem; border: 1px solid var(--border); border-radius: var(--r-md); text-align: center; transition: all var(--dur-fast) ease; background: rgba(255,255,255,0.015); }
.model-tab:hover { border-color: var(--border-hover); }
.model-tab.active { border-color: var(--orange); box-shadow: var(--glow-orange); background: rgba(255,122,26,0.06); }
.model-tab .name { font-size: var(--fs-sm); font-weight: 500; }
.model-tab .star { color: var(--orange); }
.sample-nav { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1.4rem; }
.sample-chip { font-family: var(--font-mono); font-size: var(--fs-xs); padding: 0.4rem 0.7rem; border: 1px solid var(--border); border-radius: 999px; color: var(--text-muted); transition: all var(--dur-fast) ease; }
.sample-chip:hover { border-color: var(--border-hover); color: var(--text); }
.sample-chip.active { border-color: var(--violet); color: var(--text); background: rgba(109,74,255,0.08); }

/* ---- Section headers ---- */
.sec-head { margin-bottom: 2.4rem; }
.sec-head h2 { margin-top: 0.7rem; }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--border); padding-block: 3rem; }
.footer__grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem; }
.footer h4 { font-size: var(--fs-sm); color: var(--text-muted); margin-bottom: 0.9rem; }
.footer a { display: block; color: var(--text-faint); font-size: var(--fs-sm); padding: 0.2rem 0; transition: color var(--dur-fast) ease; }
.footer a:hover { color: var(--text); }

/* ---- Responsive ---- */
@media (max-width: 760px) {
  .nav__links { display: none; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}