:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-soft: #f5f7fa;
  --panel-soft-2: #eceff3;
  --text: #000000;
  --muted: #545c67;
  --faint: #545c67;
  --line: rgba(0, 0, 0, 0.16);
  --line-soft: rgba(0, 0, 0, 0.12);
  --line-strong: #000000;
  --accent: #c74b79;
  --accent-soft: #f5dde6;
  --blue: #5d7ec7;
  --green: #6b9d3f;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
}

.page {
  max-width: 1520px;
  margin: 0 auto;
  padding: 28px 24px 72px;
}

.hero {
  padding: 12px 0 28px;
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.title-wordmark {
  display: inline-block;
  padding: 0.12em 0.34em 0.16em;
  margin-right: 0.08em;
  border-radius: 0.23em;
  background: #000;
  color: #fff;
  font-weight: 700;
  font-style: italic;
  line-height: 0.96;
  vertical-align: 0.02em;
  white-space: nowrap;
}

.hero-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  max-width: 1320px;
  margin-top: 34px;
}

.hero-video-wrap {
  width: 90%;
  max-width: 1188px;
  justify-self: center;
  overflow: hidden;
  background: #fff;
}

.hero-video {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  background: #fff;
  border: 0;
  outline: none;
}

.task-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid #000;
}

.task-tab {
  appearance: none;
  border: 0;
  border-bottom: 4px solid transparent;
  background: transparent;
  position: relative;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 400;
  padding: 2px 0 10px;
  cursor: pointer;
  margin-bottom: -11.5px;
  transition: color 140ms ease, border-color 140ms ease;
}

.task-tab::after {
  content: attr(data-label);
  display: block;
  height: 0;
  overflow: hidden;
  visibility: hidden;
  font-weight: 700;
}

.task-tab:hover {
  border-bottom-color: #000;
}

.task-tab.active {
  color: var(--text);
  font-weight: 700;
  border-bottom-color: #000;
}

.task-panel {
  display: none;
}

.task-panel.active {
  display: block;
}

.section { margin-top: 34px; }

.section-head h2 {
  margin: 0 0 6px;
  font-size: 25px;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0 0 16px;
  color: var(--text);
  max-width: 1440px;
}

.section-head strong {
  color: var(--text);
  font-weight: 700;
}

.section-head p + p {
  margin-top: -2px;
}

.stack {
  display: grid;
  gap: 18px;
}

.dataset-widget {
  padding-top: 12px;
}

.dataset-widget::before {
  content: "";
  display: block;
  width: 52px;
  height: 4px;
  background: #000;
  margin: 0 0 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.card-header h3 {
  margin: 0;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.meta {
  color: #5E5E5E;
  font-size: 13px;
}

.panel {
  background: #ffffff;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 12px;
}

.panel.comparison-shell {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
}

.panel.comparison-pane {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
}

.panel h4 {
  margin: 0 0 10px;
  font-size: 14px;
}

.input-mixture-title {
  font-size: 18px !important;
  letter-spacing: -0.02em;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.spectro {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  background: #111;
}

audio {
  width: 100%;
  margin-top: 8px;
}

.audio-player {
  width: 100%;
  margin-top: 8px;
  display: grid;
  grid-template-columns: 22px auto minmax(0, 1fr) 24px;
  align-items: center;
  gap: 12px;
  min-height: 42px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #FFFFFF;
  border: 1.5px solid var(--line-strong);
}

.audio-player-compact {
  grid-template-columns: 20px auto minmax(0, 1fr) 22px;
  gap: 10px;
  min-height: 38px;
  padding: 8px 10px;
}

.audio-player-element {
  display: none;
}

.audio-player-btn {
  appearance: none;
  width: 22px;
  height: 22px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #000000;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
}

.audio-player-compact .audio-player-btn {
  width: 20px;
  height: 20px;
}

.audio-player-btn:hover {
  background: #000000;
  color: #ffffff;
  opacity: 1;
}

.audio-player-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.audio-player-compact .audio-player-btn svg {
  width: 15px;
  height: 15px;
}

.audio-player-range {
  display: none;
}

.audio-player-time {
  color: #000000;
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
  min-width: 72px;
  text-align: left;
}

.audio-player-compact .audio-player-time {
  font-size: 11px;
  min-width: 64px;
}

.audio-player-progress-wrap {
  position: relative;
  width: 100%;
  height: 22px;
  cursor: pointer;
  --progress-pct: 0%;
}

.audio-player-compact .audio-player-progress-wrap {
  height: 20px;
}

.audio-player-progress-base,
.audio-player-progress-played {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 999px;
}

.audio-player-progress-base {
  width: 100%;
  height: 2px;
  background: #000000;
  opacity: 0.42;
}

.audio-player-progress-played {
  width: var(--progress-pct);
  height: 4px;
  background: #000000;
}

.audio-player-progress-thumb {
  position: absolute;
  left: var(--progress-pct);
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: #000000;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 120ms ease;
}

.audio-player-compact .audio-player-progress-thumb {
  width: 12px;
  height: 12px;
}

.audio-player-progress-wrap.is-hovering .audio-player-progress-thumb,
.audio-player.is-dragging .audio-player-progress-thumb,
.audio-player.is-persist-handle .audio-player-progress-thumb {
  opacity: 1;
}

.audio-player-compact .audio-player-progress-thumb {
  width: 10px;
  height: 10px;
}

.audio-player-download {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: #000000;
  text-decoration: none;
}

.audio-player-download:hover {
  background: #000000;
  color: #ffffff;
  opacity: 1;
}

.audio-player-download svg {
  width: 16px;
  height: 16px;
}

.audio-player-download path {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.audio-player-compact .audio-player-download {
  width: 22px;
  height: 22px;
}

.audio-player-compact .audio-player-download svg {
  width: 15px;
  height: 15px;
}

.roll-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.roll-card {
  background: #F6F8F8;
  border: 2px solid #5E5E5E;
  border-radius: 10px;
  padding: 12px 12px 14px;
  min-width: 0;
}

.roll-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.roll-head h4 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.roll-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: flex-end;
}

.icon-btn {
  appearance: none;
  border: 1.5px solid var(--line-strong);
  background: #FFFFFF;
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  gap: 6px;
  padding: 0 12px;
  width: 94px;
  min-width: 94px;
}

.icon-btn:hover {
  background: #000000;
  border-color: #000000;
  color: #ffffff;
}

.icon-btn svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.icon-btn span {
  font-size: 13px;
  font-weight: 700;
  display: inline-block;
  min-width: 38px;
  text-align: left;
}

.piano-roll {
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: transparent;
}

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.carousel-status {
  color: var(--text);
  font-size: 16px;
  font-weight: 400;
  text-align: center;
  flex: 1 1 auto;
}

.carousel-stage {
  min-width: 0;
}

.carousel-btn {
  appearance: none;
  border: 0;
  background: #ffffff;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.carousel-btn:hover {
  background: #000000;
  color: #ffffff;
}

.carousel-btn svg {
  width: 18px;
  height: 18px;
  display: block;
}

.carousel-btn path {
  fill: none;
  stroke: currentColor;
  stroke-width: 3;
  stroke-linecap: butt;
  stroke-linejoin: miter;
}

.piano-roll svg {
  width: 100%;
  height: auto;
  display: block;
}

.roundtrip-pane-head {
  min-height: 40px;
  margin-bottom: 6px;
}

.metric-empty {
  visibility: hidden;
}

.codec-grid-compact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.oneshot-class-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.oneshot-class-pane {
  border-color: transparent;
}

.oneshot-method-list {
  display: grid;
  gap: 14px;
}

.oneshot-method-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-top: 10px;
  margin-top: 8px;
  border-top: 0;
}

.oneshot-method-name {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  align-self: start;
}

.oneshot-class-title {
  text-align: center;
  font-size: 18px !important;
  letter-spacing: -0.02em;
  margin-bottom: 12px !important;
  position: relative;
  padding-bottom: 10px;
}

.oneshot-class-title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 34px;
  height: 2px;
  transform: translateX(-50%);
  background: currentColor;
}

.oneshot-method-row.has-spectro .oneshot-method-name {
  padding-top: 34px;
}

.oneshot-method-row.is-missing {
  align-items: center;
}

.oneshot-method-row.is-missing .oneshot-method-audio {
  display: flex;
  align-items: center;
  justify-content: center;
}

.oneshot-method-audio audio {
  width: 100%;
  min-width: 260px;
  height: 42px;
}

.oneshot-method-audio .audio-player {
  min-width: 260px;
}

.oneshot-spectro {
  margin-bottom: 8px;
  max-height: 78px;
  object-fit: cover;
}

.notes-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.notes-table th,
.notes-table td {
  border-top: 1px solid var(--line);
  padding: 8px 8px;
  text-align: left;
  vertical-align: middle;
}

.notes-table th {
  color: var(--text);
  font-weight: 700;
  background: #F6F8F8;
}

.notes-total-row td {
  border-top: 2px solid var(--line);
}

.correction-block + .correction-block {
  margin-top: 30px;
}

.correction-block h3 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.correction-block p {
  margin: 0 0 12px;
  color: var(--text);
}

.audio-link {
  display: inline-block;
  font-size: 12px;
  color: var(--text);
  background: #fff;
  padding: 5px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: pointer;
}

.audio-link.missing {
  color: #5E5E5E;
  border-color: #5E5E5E;
  border-style: dashed;
  cursor: default;
}

.oneshot-method-audio .audio-link.missing {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  margin: 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.summary-card {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 12px;
}

.summary-card h4 {
  margin: 0 0 8px;
  font-size: 14px;
}

.summary-stat {
  color: var(--muted);
  font-size: 13px;
}

.fine-print {
  color: #5E5E5E;
  font-size: 13px;
}

.roll-fine-print {
  color: #5E5E5E;
}

@media (max-width: 1160px) {
  .three-col,
  .summary-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 920px) {
  .hero-summary {
    grid-template-columns: 1fr;
    gap: 18px;
    margin-top: 24px;
  }

  .three-col,
  .two-col,
  .summary-grid,
  .codec-grid-compact,
  .oneshot-class-grid,
  .roll-grid {
    grid-template-columns: 1fr !important;
  }

  .oneshot-method-row {
    grid-template-columns: 1fr;
  }

  .oneshot-method-audio audio {
    min-width: 0;
  }
}