:root {
  color-scheme: dark;
  --bg: #121312;
  --surface: #1a1c1a;
  --surface-raised: #20231f;
  --surface-soft: #242821;
  --line: #45473e;
  --line-soft: #30332d;
  --ink: #f1ecdc;
  --muted: #b6b19f;
  --subtle: #858476;
  --amber: #e6a447;
  --amber-bright: #ffc86c;
  --amber-deep: #754619;
  --danger: #ff8b71;
  --warning: #ffd173;
  --radius: 14px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 80% -5%, rgba(230, 164, 71, 0.08), transparent 33rem),
    var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled, input:disabled { cursor: not-allowed; opacity: 0.46; }

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

.site-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  border-bottom: 1px solid var(--line-soft);
}

.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); text-decoration: none; }
.brand-mark {
  display: grid;
  width: 37px;
  height: 37px;
  place-items: center;
  border: 1px solid var(--amber);
  border-radius: 11px;
  color: var(--amber-bright);
  font-family: Georgia, serif;
  font-size: 26px;
  line-height: 1;
  transform: rotate(-8deg);
}
.brand-name { display: block; font-weight: 750; letter-spacing: 0.03em; }
.brand-subtitle, .eyebrow, .section-kicker, .art-caption, .site-footer {
  font-size: 0.67rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}
.brand-subtitle { display: block; color: var(--subtle); margin-top: 1px; }
.local-badge { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 0.82rem; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 4px rgba(230, 164, 71, 0.13); }

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 1.12fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: center;
  padding: 74px 0 68px;
}
.intro-copy { max-width: 530px; }
.eyebrow, .section-kicker { color: var(--amber); margin: 0 0 14px; }
h1, h2, p { margin-top: 0; }
h1 {
  margin-bottom: 19px;
  font-size: clamp(2.8rem, 6vw, 5.7rem);
  line-height: 0.99;
  letter-spacing: -0.065em;
  font-weight: 650;
}
h1 em { color: var(--amber-bright); font-style: normal; }
.intro-lead { max-width: 470px; margin-bottom: 0; color: var(--muted); font-size: 1.07rem; }
.intro-art { position: relative; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 17px; box-shadow: var(--shadow); background: #10120f; }
.intro-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(18, 19, 18, 0.55), transparent 45%, rgba(18, 19, 18, 0.1)); pointer-events: none; }
.intro-art img { display: block; width: 100%; height: auto; opacity: 0.84; }
.art-caption { position: absolute; z-index: 1; right: 15px; bottom: 12px; color: rgba(255,255,255,.72); }

.workbench, .result-panel {
  margin-bottom: 18px;
  padding: clamp(21px, 3vw, 34px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(37, 41, 34, .86), rgba(25, 27, 24, .98));
  box-shadow: 0 15px 44px rgba(0,0,0,.14);
}
.section-heading { display: flex; align-items: start; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-kicker { margin-bottom: 7px; }
h2 { margin-bottom: 0; font-size: clamp(1.2rem, 2.2vw, 1.65rem); line-height: 1.1; letter-spacing: -0.03em; }
.section-note { flex: 0 1 auto; max-width: 45%; margin: 3px 0 0; color: var(--subtle); font-size: .82rem; text-align: right; }
.microcopy { margin: 11px 0 0; color: var(--subtle); font-size: .79rem; }

.file-drop { display: grid; min-height: 158px; place-content: center; justify-items: center; gap: 5px; padding: 26px; border: 1px dashed #74705f; border-radius: 11px; background: rgba(12, 14, 12, .24); color: var(--ink); text-align: center; cursor: pointer; transition: border-color .15s ease, background .15s ease; }
.file-drop:hover, .file-drop:focus-within { border-color: var(--amber); background: rgba(117, 70, 25, .12); }
.file-drop input { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.drop-icon { display: grid; width: 38px; height: 38px; place-items: center; margin-bottom: 2px; border-radius: 50%; background: var(--amber-deep); color: var(--amber-bright); font-size: 1.5rem; line-height: 1; }
.drop-title { font-weight: 700; }
.drop-note { color: var(--muted); font-size: .82rem; }
.file-list { display: grid; gap: 7px; margin-top: 14px; }
.file-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 9px 12px; border: 1px solid var(--line-soft); border-radius: 8px; background: rgba(15, 17, 15, .32); color: var(--muted); font-size: .84rem; }
.file-row strong { min-width: 0; overflow: hidden; color: var(--ink); font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }

.waveform-frame { position: relative; overflow: hidden; min-height: 205px; border: 1px solid #56523e; border-radius: 10px; background: #151814; }
#waveform { display: block; width: 100%; height: 260px; touch-action: none; }
.waveform-empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--subtle); font-size: .86rem; pointer-events: none; }
.range-fields { display: grid; grid-template-columns: minmax(110px, 1fr) auto minmax(110px, 1fr) minmax(120px, auto); align-items: end; gap: 10px; margin-top: 18px; }
.range-fields label, .control-card { display: grid; gap: 7px; }
.range-fields label > span, .control-label { color: var(--muted); font-size: .82rem; }
small { color: var(--subtle); font-size: .83em; }
input[type="number"] { width: 100%; min-height: 46px; padding: 8px 11px; border: 1px solid #666354; border-radius: 7px; background: #141613; color: var(--ink); font-size: 1rem; }
input[type="number"]:hover, input[type="number"]:focus { border-color: var(--amber); }
.range-arrow { padding-bottom: 12px; color: var(--amber); }
.selection-duration { align-self: end; margin: 0 0 11px; color: var(--amber-bright); font-size: .83rem; text-align: right; white-space: nowrap; }

.control-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.control-card { min-height: 132px; padding: 17px; border: 1px solid var(--line-soft); border-radius: 10px; background: rgba(12, 14, 12, .25); }
.input-with-suffix { display: flex; align-items: center; gap: 8px; }
.input-with-suffix input { min-width: 0; }
.input-with-suffix > span { color: var(--subtle); font-size: .82rem; }
.control-hint { margin-top: auto; color: var(--subtle); font-size: .72rem; }
.control-label { display: flex; justify-content: space-between; gap: 8px; }
.control-label output { color: var(--amber-bright); font-weight: 700; }
input[type="range"] { width: 100%; height: 44px; accent-color: var(--amber); }
.gain-scale { display: flex; justify-content: space-between; margin-top: -4px; color: var(--subtle); font-size: .68rem; }
.action-row, .result-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 23px; }
.primary-button, .secondary-button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; padding: 9px 17px; border: 1px solid transparent; border-radius: 7px; font-weight: 700; line-height: 1.2; text-decoration: none; }
.primary-button { border-color: var(--amber); background: var(--amber); color: #21160a; }
.primary-button:hover:not(.disabled), .primary-button:focus-visible:not(.disabled) { background: var(--amber-bright); border-color: var(--amber-bright); }
.secondary-button { border-color: #686653; background: transparent; color: var(--ink); }
.secondary-button:hover:not(:disabled), .secondary-button:focus-visible:not(:disabled) { border-color: var(--amber); color: var(--amber-bright); }
.disabled { pointer-events: none; opacity: .4; }
.processing-status { min-height: 1.5em; color: var(--muted); font-size: .82rem; }
.message { margin-top: 16px; padding: 11px 14px; border-left: 3px solid; border-radius: 5px; font-size: .86rem; }
.error-message { border-color: var(--danger); background: rgba(157, 52, 33, .14); color: #ffc0b0; }
.warning-message { border-color: var(--warning); background: rgba(163, 105, 19, .14); color: #ffe0a0; }

.result-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px 28px; border-color: #6b512c; background: linear-gradient(135deg, rgba(82, 55, 24, .38), rgba(25, 28, 23, .96)); }
.result-panel audio { width: min(100%, 365px); }
.result-meta { margin: 8px 0 0; color: var(--muted); font-size: .83rem; }
.result-actions { grid-column: 1 / -1; margin-top: 0; }
.result-note { grid-column: 1 / -1; margin: 0; color: var(--subtle); font-size: .75rem; }

.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin: 60px 0 55px; border: 1px solid var(--line-soft); border-radius: var(--radius); overflow: hidden; background: var(--line-soft); }
.info-grid details { min-height: 100%; padding: 22px 24px; background: var(--surface); }
.info-grid summary { cursor: pointer; color: var(--ink); font-weight: 700; }
.info-grid summary::marker { color: var(--amber); }
.info-grid p, .info-grid ol { margin: 15px 0 0; color: var(--muted); font-size: .82rem; }
.info-grid ol { padding-left: 20px; }
.info-grid li + li { margin-top: 5px; }
.site-footer { display: flex; justify-content: space-between; padding: 18px 0 28px; color: var(--subtle); }

@media (max-width: 800px) {
  .intro { grid-template-columns: 1fr; gap: 27px; padding: 52px 0 45px; }
  .intro-copy { max-width: 650px; }
  h1 { max-width: 600px; }
  .intro-art { max-width: 640px; }
  .result-panel { grid-template-columns: 1fr; }
  .result-panel audio { width: 100%; }
}

@media (max-width: 620px) {
  .site-shell { width: min(100% - 24px, 560px); }
  .site-header { min-height: 70px; }
  .local-badge { font-size: .72rem; }
  .intro { padding: 40px 0 34px; }
  h1 { font-size: clamp(2.65rem, 14vw, 4rem); }
  .intro-lead { font-size: .96rem; }
  .section-heading { display: block; }
  .section-note { max-width: none; margin-top: 9px; text-align: left; }
  .range-fields { grid-template-columns: 1fr 16px 1fr; }
  .selection-duration { grid-column: 1 / -1; justify-self: start; margin: 4px 0 0; }
  .control-grid { grid-template-columns: 1fr; }
  .control-card { min-height: 116px; }
  .result-actions .primary-button { flex: 1 1 100%; }
  .info-grid { grid-template-columns: 1fr; margin-top: 42px; }
}

@media (max-width: 370px) {
  .site-shell { width: calc(100% - 18px); }
  .brand-subtitle { display: none; }
  .local-badge { font-size: .66rem; }
  .workbench, .result-panel { padding: 18px 14px; }
  .file-drop { padding: 20px 10px; }
  .drop-note { font-size: .74rem; }
  .range-fields { gap: 6px; }
  .site-footer { display: block; line-height: 2; }
  .site-footer span { display: block; }
}

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