/* MyFreeAudioTool v2 — "signal lab" design system
   White / sky-blue, blueprint grid, mono labels, soft 3D. */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f9fd;
  --grid-line: rgba(14, 165, 233, 0.055);
  --text: #0b1526;
  --muted: #56708a;
  --accent: #0ea5e9;
  --accent-2: #22d3ee;
  --accent-dark: #0284c7;
  --accent-soft: rgba(14, 165, 233, 0.08);
  --grad: linear-gradient(135deg, #0ea5e9, #22d3ee);
  --card: #ffffff;
  --border: #dbeaf5;
  --shadow: 0 8px 40px rgba(13, 72, 115, 0.08);
  --shadow-lift: 0 22px 60px rgba(13, 72, 115, 0.16);
  --radius: 16px;
  --wave-base: #d9e8f4;
  --header-bg: rgba(255, 255, 255, 0.78);
  --ok: #0e9f6e;
  --err: #e02d2d;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, "Liberation Mono", monospace;
}

/* Studio Mode — near-black neutral, glowing instrumentation */
[data-theme="dark"] {
  --bg: #0a0a0c;
  --bg-soft: #0f0f12;
  --grid-line: rgba(56, 189, 248, 0.04);
  --text: #ececf1;
  --muted: #8d94a1;
  --accent: #38bdf8;
  --accent-2: #22d3ee;
  --accent-dark: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.1);
  --card: #141417;
  --border: #242429;
  --shadow: 0 8px 40px rgba(0, 0, 0, 0.55);
  --shadow-lift: 0 22px 60px rgba(0, 0, 0, 0.72);
  --wave-base: #232329;
  --header-bg: rgba(10, 10, 12, 0.8);
  --ok: #34d399;
  --err: #ff6b6b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* barely-perceptible paper grain over everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 2000;
  pointer-events: none;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3, .logo { font-family: var(--font-display); }

/* tabular figures for every numeric readout */
.status, .file-info, .mock-meta, .kicker, .tech-card, .hero__stats .stat, .knob__value, code {
  font-variant-numeric: tabular-nums;
}

a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img, canvas, video { max-width: 100%; }
code { font-family: var(--font-mono); font-size: 0.9em; background: var(--accent-soft); padding: 1px 6px; border-radius: 6px; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 840px; }

/* mono kicker labels — the nerdy thread through the whole site */
.kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.04rem; letter-spacing: -0.02em;
  color: var(--text) !important;
}
.logo:hover { text-decoration: none; }
.logo svg { width: 30px; height: 30px; flex: none; }
.logo__tag { font-style: normal; color: var(--accent); font-family: var(--font-mono); font-size: 0.8em; font-weight: 500; }

.nav { display: flex; align-items: center; gap: 22px; }
.nav a {
  color: var(--muted); font-size: 0.85rem; font-weight: 600;
  font-family: var(--font-mono); letter-spacing: 0.04em;
}
.nav a::before { content: "/"; color: var(--accent); margin-right: 2px; opacity: 0.7; }
.nav a:hover { color: var(--text); text-decoration: none; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  cursor: pointer; transition: transform 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover { transform: translateY(-2px); border-color: var(--accent); }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (max-width: 640px) { .nav a:not(.theme-toggle) { display: none; } }

/* ---------- Hero (homepage) ---------- */
.hero { padding: 80px 0 56px; overflow: hidden; }
.hero__split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero__split { grid-template-columns: 1fr; } }

.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4rem);
  line-height: 1.04; letter-spacing: -0.035em; font-weight: 700;
  margin: 0 0 20px;
}
.hero h1 .grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero p.lede { font-size: clamp(1.02rem, 1.8vw, 1.18rem); color: var(--muted); max-width: 540px; margin: 0 0 28px; }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-soft); color: var(--accent-dark);
  border: 1px solid var(--border);
  font-family: var(--font-mono); font-weight: 600; font-size: 0.78rem; letter-spacing: 0.05em;
  padding: 7px 14px; border-radius: 999px; margin-bottom: 22px;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 8px var(--ok); }

.hero__stats { display: flex; gap: 28px; margin-top: 30px; flex-wrap: wrap; }
.hero__stats .stat { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.hero__stats .stat b { display: block; font-size: 1.3rem; color: var(--text); font-family: var(--font-display); letter-spacing: -0.02em; }

/* ---------- 3D mock windows ---------- */
.scene { perspective: 1400px; }
.mock-window {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  transform-style: preserve-3d;
}
.scene--hero .mock-window {
  transform: rotateY(-14deg) rotateX(7deg) rotateZ(1deg);
  transition: transform 0.5s ease;
}
.scene--hero:hover .mock-window { transform: rotateY(-6deg) rotateX(3deg); }
@media (max-width: 900px) { .scene--hero .mock-window { transform: rotateY(-6deg) rotateX(3deg); } }

.mock-window__bar {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px; border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.mock-window__bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--wave-base); }
.mock-window__bar i:first-child { background: #ff6b6b; }
.mock-window__bar i:nth-child(2) { background: #fbbf24; }
.mock-window__bar i:nth-child(3) { background: #34d399; }
.mock-window__bar span {
  margin-left: 8px; font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.05em;
}
.mock-window__body { padding: 18px; }

.mock-wave { display: flex; align-items: center; gap: 3px; height: 90px; }
.mock-wave i {
  flex: 1; border-radius: 3px; background: var(--wave-base);
  height: calc(var(--h) * 1%);
  min-height: 6%;
}
.mock-wave i.on { background: var(--grad); }

.mock-row { display: flex; gap: 8px; margin-top: 14px; align-items: center; }
.mock-btn {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600; letter-spacing: 0.05em;
  padding: 7px 12px; border-radius: 8px;
}
.mock-btn--p { background: var(--grad); color: #fff; }
.mock-btn--g { border: 1px solid var(--border); color: var(--muted); }
.mock-meta { margin-left: auto; font-family: var(--font-mono); font-size: 0.68rem; color: var(--muted); }

/* floating chips around the hero scene */
.scene--hero { position: relative; }
.chip {
  position: absolute; z-index: 2;
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.04em;
  background: var(--card); border: 1px solid var(--border); color: var(--accent-dark);
  border-radius: 10px; padding: 8px 12px;
  box-shadow: var(--shadow);
  animation: floaty 5s ease-in-out infinite;
}
.chip--1 { top: -16px; right: 4%; animation-delay: 0s; }
.chip--2 { bottom: 8%; left: -14px; animation-delay: 1.4s; }
.chip--3 { top: 38%; right: -10px; animation-delay: 2.6s; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* hero canvas waveform strip */
.hero-wave-strip { display: block; width: 100%; height: 64px; margin-top: 40px; opacity: 0.85; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 12px;
  font-size: 0.98rem; font-weight: 700; font-family: var(--font-body);
  border: none; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
  text-decoration: none !important;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; }
.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35); }
.btn--primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(14, 165, 233, 0.45); }
.btn--ghost { background: var(--card); color: var(--text); border: 1px solid var(--border); }
.btn--ghost:hover:not(:disabled) { border-color: var(--accent); color: var(--accent-dark); transform: translateY(-2px); }
.btn--sm { padding: 9px 16px; font-size: 0.86rem; border-radius: 10px; }
.btn.active { border-color: var(--accent); color: var(--accent-dark); background: var(--accent-soft); }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section--soft { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-title { font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 700; letter-spacing: -0.03em; text-align: center; margin: 0 0 10px; }
.section-sub { text-align: center; color: var(--muted); max-width: 580px; margin: 0 auto 40px; }

/* ---------- Tool grid (grouped) ---------- */
.cat-label {
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent);
  margin: 36px 0 14px; display: flex; align-items: center; gap: 12px;
}
.cat-label::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.cat-label:first-of-type { margin-top: 0; }

.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(238px, 1fr)); gap: 16px; }

.tool-card {
  position: relative; display: block;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 22px; box-shadow: var(--shadow);
  color: var(--text) !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.tool-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); border-color: var(--accent); text-decoration: none; }
.tool-card__num {
  position: absolute; top: 18px; right: 18px;
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); opacity: 0.7;
}
.tool-card__icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--accent-soft); color: var(--accent-dark);
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.tool-card__icon svg { width: 22px; height: 22px; }
.tool-card h3 { margin: 0 0 5px; font-size: 1.04rem; font-weight: 700; letter-spacing: -0.01em; }
.tool-card p { margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.5; }

/* ---------- Comparison strip ---------- */
.compare { max-width: 880px; margin: 0 auto; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare table { width: 100%; border-collapse: collapse; background: var(--card); font-size: 0.92rem; }
.compare th, .compare td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--border); }
.compare tr:last-child td { border-bottom: none; }
.compare thead th { background: var(--bg-soft); font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.compare thead th:nth-child(2) { color: var(--accent-dark); }
.compare td:first-child { color: var(--muted); }
.compare .yes { color: var(--ok); font-weight: 700; }
.compare .no { color: var(--err); font-weight: 700; }
@media (max-width: 600px) { .compare th, .compare td { padding: 10px 10px; font-size: 0.82rem; } }

/* ---------- Steps / FAQ ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.step { text-align: center; padding: 0 12px; }
.step__num {
  width: 44px; height: 44px; margin: 0 auto 14px; border-radius: 12px;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 1rem;
  font-family: var(--font-mono);
  display: flex; align-items: center; justify-content: center;
}
.step h3 { margin: 0 0 6px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 20px; margin-bottom: 10px; box-shadow: var(--shadow);
}
.faq summary {
  font-weight: 700; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-family: var(--font-display); font-size: 0.98rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; font-weight: 500; flex: none; font-family: var(--font-mono); }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); margin: 10px 0 0; font-size: 0.93rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 48px 0 36px; margin-top: 56px; background: var(--bg-soft); }
.site-footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 820px) { .site-footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .site-footer__grid { grid-template-columns: 1fr; } }
.site-footer h4 {
  margin: 0 0 12px; font-family: var(--font-mono); font-size: 0.74rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent);
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer a { color: var(--muted); font-size: 0.88rem; }
.site-footer a:hover { color: var(--text); }
.site-footer .tagline { color: var(--muted); font-size: 0.88rem; max-width: 300px; }
.site-footer .copyright {
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--border);
  color: var(--muted); font-size: 0.8rem; text-align: center; font-family: var(--font-mono);
}

/* ---------- Tool page ---------- */
.tool-hero { padding: 52px 0 24px; text-align: center; }
.tool-hero .kicker { margin-bottom: 12px; }
.tool-hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); font-weight: 700; letter-spacing: -0.03em; margin: 0 0 12px; }
.tool-hero p { color: var(--muted); max-width: 620px; margin: 0 auto; font-size: 1.04rem; }

.tool-panel {
  position: relative;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 28px 32px 32px;
  margin: 24px auto 40px; max-width: 880px;
}
.tool-panel::before {
  content: ""; position: absolute; top: -1px; left: 24px; right: 24px; height: 2px;
  background: var(--grad); border-radius: 2px;
}
@media (max-width: 600px) { .tool-panel { padding: 20px 16px 24px; } }

.privacy-note {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0 0 18px;
  font-family: var(--font-mono); font-size: 0.76rem; font-weight: 600; letter-spacing: 0.04em;
  color: var(--accent-dark); background: var(--accent-soft);
  border: 1px solid var(--border);
  padding: 7px 14px; border-radius: 999px;
}
.privacy-note svg { width: 13px; height: 13px; flex: none; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border); border-radius: 14px;
  padding: 52px 24px; text-align: center; cursor: pointer;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 22px 22px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background-color: var(--accent-soft); }
.dropzone__icon { color: var(--accent); margin-bottom: 12px; }
.dropzone__icon svg { width: 42px; height: 42px; }
.dropzone h2 { margin: 0 0 6px; font-size: 1.15rem; font-weight: 700; }
.dropzone p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.dropzone .hint-drop { font-family: var(--font-mono); font-size: 0.72rem; margin-top: 10px; color: var(--accent); opacity: 0.8; }
.dropzone input[type="file"] { display: none; }

/* File info chip */
.file-info {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 16px; margin-bottom: 18px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 0.82rem;
}
.file-info strong { word-break: break-all; font-weight: 600; }
.file-info .meta { color: var(--muted); white-space: nowrap; }

/* Waveform */
.wave-wrap { position: relative; margin: 8px 0 14px; user-select: none; -webkit-user-select: none; }
.wave-wrap canvas { display: block; width: 100%; height: 140px; border-radius: 10px; touch-action: none; cursor: crosshair; background: var(--bg-soft); }

/* Controls */
.controls-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 16px 0; }
.controls-row .spacer { flex: 1; }

.field { margin: 16px 0; }
.field label { display: block; font-weight: 700; font-size: 0.92rem; margin-bottom: 8px; }
.field .hint { color: var(--muted); font-size: 0.82rem; font-weight: 400; }

select.input, input[type="text"].input, input[type="number"].input {
  width: 100%; max-width: 340px;
  padding: 11px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-size: 0.92rem; font-family: var(--font-mono);
}

input[type="range"].slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 3px;
  background: var(--wave-base); outline: none;
}
input[type="range"].slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 3px solid var(--card); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
input[type="range"].slider::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 3px solid var(--card); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* checkbox row */
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 0.9rem; cursor: pointer; color: var(--muted); }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }

/* Progress + status */
.progress { height: 8px; border-radius: 4px; background: var(--wave-base); overflow: hidden; margin: 14px 0 8px; display: none; }
.progress.active { display: block; }
.progress__bar { height: 100%; width: 0%; background: var(--grad); border-radius: 4px; transition: width 0.2s ease; }
.progress.indeterminate .progress__bar { width: 35% !important; animation: indet 1.2s ease-in-out infinite; }
@keyframes indet { 0% { transform: translateX(-110%); } 100% { transform: translateX(320%); } }

.status { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); min-height: 1.5em; margin: 8px 0; }
.status.error { color: var(--err); font-weight: 600; }
.status.success { color: var(--ok); font-weight: 600; }

/* Result box */
.result-box {
  background: var(--accent-soft); border: 1px solid var(--accent);
  border-radius: 14px; padding: 20px; margin-top: 20px; text-align: center;
}
.result-box p { margin: 0 0 14px; font-weight: 600; }

/* Selection limit meter (ringtone) */
.limit-meter { margin: 4px 0 14px; }
.limit-meter .limit-bar { height: 7px; border-radius: 4px; background: var(--wave-base); overflow: hidden; }
.limit-meter .limit-bar i { display: block; height: 100%; background: var(--grad); border-radius: 4px; transition: width 0.15s ease; }
.limit-meter.over .limit-bar i { background: var(--err); }
.limit-meter .limit-text { font-family: var(--font-mono); font-size: 0.76rem; color: var(--muted); margin-top: 5px; }
.limit-meter.over .limit-text { color: var(--err); font-weight: 600; }

/* Merge list */
.merge-list { list-style: none; padding: 0; margin: 0 0 16px; }
.merge-list li {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 14px; margin-bottom: 10px; cursor: grab;
  transition: box-shadow 0.15s ease, opacity 0.15s ease;
}
.merge-list li.dragging { opacity: 0.45; }
.merge-list li.dragover-item { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.merge-list .grip { color: var(--muted); flex: none; font-size: 1.05rem; }
.merge-list .name { flex: 1; font-size: 0.85rem; font-weight: 600; word-break: break-all; font-family: var(--font-mono); }
.merge-list .meta { color: var(--muted); font-size: 0.76rem; white-space: nowrap; font-family: var(--font-mono); }
.merge-list .item-btn {
  background: none; border: 1px solid var(--border); border-radius: 8px;
  color: var(--muted); cursor: pointer; padding: 4px 9px; font-size: 0.85rem; line-height: 1;
}
.merge-list .item-btn:hover { color: var(--accent-dark); border-color: var(--accent); }

/* Recorder */
.rec-time {
  font-size: clamp(2.6rem, 9vw, 4rem); font-weight: 700; letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums; text-align: center; margin: 8px 0;
  font-family: var(--font-mono);
}
.rec-dot { display: inline-block; width: 13px; height: 13px; border-radius: 50%; background: var(--err); margin-right: 12px; vertical-align: middle; animation: pulse 1.1s ease-in-out infinite; }
.rec-dot.paused { animation: none; background: var(--muted); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

.level-meter { max-width: 380px; margin: 0 auto 4px; }
.level-meter .level-bar { height: 10px; border-radius: 5px; background: var(--wave-base); overflow: hidden; }
.level-meter .level-bar i { display: block; height: 100%; width: 0%; background: var(--grad); border-radius: 5px; transition: width 0.08s linear; }
.level-meter .level-text { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); margin-top: 4px; }

.rec-wave { display: block; width: 100%; height: 90px; border-radius: 10px; background: var(--bg-soft); margin: 12px 0; }

/* EQ */
.eq-grid { display: flex; gap: 4px; justify-content: space-between; margin: 16px 0 6px; }
.eq-band { display: flex; flex-direction: column; align-items: center; gap: 6px; flex: 1; min-width: 0; }
.eq-slider-wrap { width: 26px; height: 140px; position: relative; }
.eq-slider-wrap input[type="range"] {
  -webkit-appearance: none; appearance: none;
  position: absolute; top: 50%; left: 50%;
  width: 140px; height: 5px; margin: 0;
  transform: translate(-50%, -50%) rotate(-90deg);
  background: var(--wave-base); border-radius: 3px; outline: none;
}
.eq-slider-wrap input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 17px; height: 17px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 3px solid var(--card); box-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
}
.eq-slider-wrap input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 3px solid var(--card);
}
.eq-band .freq { font-family: var(--font-mono); font-size: 0.66rem; color: var(--muted); }
.eq-band .gain-val { font-family: var(--font-mono); font-size: 0.66rem; color: var(--accent-dark); min-height: 1em; }
.eq-curve { display: block; width: 100%; height: 110px; border-radius: 10px; background: var(--bg-soft); margin: 6px 0 14px; }
@media (max-width: 560px) { .eq-slider-wrap { height: 110px; } .eq-slider-wrap input[type="range"] { width: 110px; } }

/* BPM result cards */
.analysis-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 18px 0; }
@media (max-width: 520px) { .analysis-grid { grid-template-columns: 1fr; } }
.analysis-card {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; text-align: center;
}
.analysis-card .label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
.analysis-card .value { font-family: var(--font-display); font-size: 2.6rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; }
.analysis-card .conf { font-family: var(--font-mono); font-size: 0.74rem; color: var(--muted); margin-top: 6px; }

/* Video thumb (extract page) */
.video-thumb { display: flex; gap: 16px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.video-thumb img, .video-thumb canvas { width: 180px; border-radius: 10px; border: 1px solid var(--border); display: block; }

/* SEO copy + related */
.tool-copy { max-width: 780px; margin: 0 auto 40px; }
.tool-copy h2 { font-size: 1.4rem; letter-spacing: -0.02em; }
.tool-copy h3 { font-size: 1.12rem; }
.tool-copy p, .tool-copy li { color: var(--muted); font-size: 0.96rem; }
.tool-copy .faq { margin-top: 8px; }
.tool-copy .faq details { box-shadow: none; }

.related-strip { max-width: 880px; margin: 0 auto 40px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-top: 12px; }
.related-card {
  display: block; background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; color: var(--text) !important; box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.related-card:hover { transform: translateY(-3px); border-color: var(--accent); text-decoration: none; }
.related-card b { display: block; font-family: var(--font-display); font-size: 0.96rem; margin-bottom: 3px; }
.related-card span { color: var(--muted); font-size: 0.82rem; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .chip { animation: none; }
  * { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
}

/* ---------- Technical readout card ---------- */
.tech-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 0;
  margin: -8px 0 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--card);
}
.tech-card__cell {
  padding: 9px 12px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: -1px -1px 0 0;
}
.tech-card dt {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 2px;
}
.tech-card dd {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  white-space: nowrap;
}
.tech-card dd i { font-style: normal; color: var(--ok); font-size: 0.86em; }

/* ---------- Sticky category nav (homepage) ---------- */
.cat-nav {
  position: sticky;
  top: 64px;
  z-index: 40;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.cat-nav__inner {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding: 8px 0;
  scrollbar-width: none;
}
.cat-nav__inner::-webkit-scrollbar { display: none; }
.cat-nav a {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 999px;
  white-space: nowrap;
  flex: none;
}
.cat-nav a:hover { color: var(--accent-dark); text-decoration: none; background: var(--accent-soft); }
.cat-nav a::before { content: "/"; color: var(--accent); margin-right: 4px; opacity: 0.7; }

/* ---------- "Built for listeners" section ---------- */
.listener-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 8px;
}
.listener-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.listener-card .num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
}
.listener-card h3 { margin: 0 0 6px; font-size: 1.02rem; }
.listener-card p { margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.55; }
.listener-card a { font-family: var(--font-mono); font-size: 0.78rem; display: inline-block; margin-top: 10px; }

/* ---------- Meter rack (shared VU + spectrum, injected by meters.js) ---------- */
.meter-rack {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 14px; margin: 0 0 16px;
}
.meter-rack__tag { font-family: var(--font-mono); font-size: 0.64rem; font-weight: 700; letter-spacing: 0.12em; color: var(--muted); flex: none; }
.meter-rack__vu { height: 30px; flex: 1.3; min-width: 0; display: block; }
.meter-rack__spec { height: 30px; flex: 1; min-width: 0; display: block; }
@media (max-width: 560px) { .meter-rack__spec { display: none; } }

/* ---------- Rotary knob ---------- */
.knob { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; margin: 4px 6px; }
.knob__dial { position: relative; cursor: ns-resize; touch-action: none; }
.knob__dial svg { display: block; width: 100%; height: 100%; overflow: visible; }
.knob__tick { stroke: var(--border); stroke-width: 1.5; }
.knob__track { fill: none; stroke: var(--wave-base); stroke-width: 4; stroke-linecap: round; }
.knob__fill { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linecap: round; }
.knob__cap { fill: var(--card); stroke: var(--border); stroke-width: 1.5; }
.knob__pointer { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
.knob__input {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0; margin: 0; cursor: ns-resize;
}
.knob__dial:has(.knob__input:focus-visible) .knob__cap { stroke: var(--accent); stroke-width: 2.5; }
.knob__value {
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600;
  font-variant-numeric: tabular-nums; color: var(--accent-dark); min-height: 1.1em;
}
.knob__label {
  font-family: var(--font-mono); font-size: 0.62rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
}
[data-theme="dark"] .knob__fill, [data-theme="dark"] .knob__pointer { filter: drop-shadow(0 0 3px rgba(56, 189, 248, 0.6)); }
.knob-row { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: center; gap: 8px 18px; margin: 14px 0; }

/* ---------- Toggle switch ---------- */
.switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: 0.88rem; color: var(--muted); font-weight: 600; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch__slide {
  flex: none; width: 38px; height: 21px; border-radius: 999px;
  background: var(--wave-base); border: 1px solid var(--border);
  position: relative; transition: background 120ms ease;
}
.switch__slide::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 15px; height: 15px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
  transition: transform 120ms cubic-bezier(0.34, 1.4, 0.64, 1);
}
.switch input:checked + .switch__slide { background: var(--accent); border-color: var(--accent); }
.switch input:checked + .switch__slide::after { transform: translateX(17px); }
.switch input:focus-visible + .switch__slide { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Preset chips ---------- */
.preset-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.preset-chip {
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.03em;
  padding: 8px 14px; border-radius: 999px; cursor: pointer;
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.preset-chip:hover { border-color: var(--accent); color: var(--accent-dark); }
.preset-chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-dark); }

/* ---------- Mode tabs ---------- */
.mode-tabs { display: inline-flex; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin: 0 0 16px; }
.mode-tabs button {
  font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.04em;
  padding: 10px 18px; border: none; cursor: pointer; background: var(--card); color: var(--muted);
}
.mode-tabs button + button { border-left: 1px solid var(--border); }
.mode-tabs button.active { background: var(--accent-soft); color: var(--accent-dark); }

/* ---------- Big numeric readout (tuner, metronome, tone gen) ---------- */
.big-readout {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 8vw, 3.6rem); font-weight: 700; letter-spacing: -0.01em;
  text-align: center; line-height: 1.1; margin: 10px 0;
}
.big-readout small { font-size: 0.4em; color: var(--muted); font-weight: 600; }

/* clipping warning */
.clip-warn {
  display: none; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: var(--err);
  margin: 8px 0;
}
.clip-warn.on { display: inline-flex; }

/* Info pages */
.prose { padding: 48px 0 56px; }
.prose h1 { font-size: clamp(2rem, 4vw, 2.7rem); letter-spacing: -0.03em; }
.prose h2 { margin-top: 2em; letter-spacing: -0.02em; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--text); }