:root {
  color-scheme: light;
  --canvas: #f4f6f8;
  --surface: #ffffff;
  --surface-subtle: #f8fafb;
  --ink: #172033;
  --muted: #687386;
  --line: #dce2e8;
  --line-strong: #c8d0da;
  --primary: #2556d8;
  --primary-dark: #1c45b5;
  --primary-soft: #edf2ff;
  --teal: #087f70;
  --teal-soft: #e8f7f3;
  --orange: #d6621c;
  --danger: #c63d46;
  --shadow: 0 12px 36px rgba(28, 42, 68, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 320px;
  background: var(--canvas);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(37, 86, 216, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 86, 216, 0.035) 1px, transparent 1px),
    var(--canvas);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button,
input,
audio {
  font: inherit;
}

button,
a,
label {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
label:has(input:focus-visible) {
  outline: 3px solid rgba(37, 86, 216, 0.25);
  outline-offset: 2px;
}

.app-shell {
  width: min(1180px, calc(100% - 40px));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.app-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #ffffff;
}

.brand-mark svg {
  width: 23px;
  height: 23px;
}

.brand > span:last-child {
  display: grid;
}

.brand strong {
  font-size: 0.95rem;
  line-height: 1.2;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.7rem;
}

.runtime-status {
  min-width: 114px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(28, 42, 68, 0.04);
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #8793a4;
}

.runtime-status[data-state="ready"] .status-dot,
.runtime-status[data-state="complete"] .status-dot {
  background: #0b9b75;
}

.runtime-status[data-state="working"] .status-dot {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(214, 98, 28, 0.12);
  animation: status-pulse 1.4s ease-in-out infinite;
}

.runtime-status[data-state="error"] {
  color: var(--danger);
  border-color: rgba(198, 61, 70, 0.28);
  background: #fff6f6;
}

.runtime-status[data-state="error"] .status-dot {
  background: var(--danger);
}

.workspace {
  flex: 1;
  padding: 48px 0 28px;
}

.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 30px;
}

.eyebrow,
.section-label {
  margin: 0;
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1,
h2 {
  letter-spacing: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.08;
}

h2 {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.3;
}

.lead {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1rem;
}

.output-specs {
  display: flex;
  gap: 10px;
  flex: 0 0 auto;
}

.output-specs > div {
  min-width: 130px;
  min-height: 58px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.72);
}

.output-specs svg {
  width: 20px;
  color: var(--teal);
}

.output-specs span {
  display: grid;
}

.output-specs strong {
  font-size: 0.82rem;
}

.output-specs small {
  color: var(--muted);
  font-size: 0.68rem;
}

.mode-switch {
  width: min(520px, 100%);
  margin: 0 0 18px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  background: #e9edf2;
}

.mode-switch label {
  min-width: 0;
  cursor: pointer;
}

.mode-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.mode-switch span {
  min-height: 52px;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: 8px;
  background: transparent;
  color: var(--muted);
}

.mode-switch svg {
  width: 18px;
  height: 18px;
  grid-row: 1 / 3;
}

.mode-switch strong {
  color: inherit;
  font-size: 0.78rem;
  line-height: 1.2;
}

.mode-switch small {
  overflow: hidden;
  font-size: 0.66rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mode-switch label:has(input:checked) span {
  border-color: var(--line);
  background: var(--surface);
  color: var(--primary);
  box-shadow: 0 2px 7px rgba(28, 42, 68, 0.08);
}

.control-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.75fr);
  gap: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.upload-panel,
.settings-panel {
  padding: 22px;
}

.panel-heading {
  min-height: 48px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.panel-heading p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.step-number {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border: 1px solid #cfd9f7;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 900;
}

.dropzone {
  min-height: 270px;
  border: 1.5px dashed #aeb8c8;
  border-radius: 8px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 8px;
  padding: 28px;
  background: var(--surface-subtle);
  color: var(--muted);
  text-align: center;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.dropzone:hover,
.dropzone.dragging {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.dropzone.dragging {
  transform: translateY(-2px);
}

.dropzone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-icon {
  width: 58px;
  height: 58px;
  margin-bottom: 5px;
  border: 1px solid #cfd9f7;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 8px 18px rgba(37, 86, 216, 0.1);
}

.upload-icon svg {
  width: 27px;
  height: 27px;
}

.drop-title {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 800;
}

.drop-copy {
  font-size: 0.84rem;
}

.drop-copy strong {
  color: var(--primary);
}

.format-list {
  margin-top: 8px;
  color: #8792a3;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.file-card,
.audio-row {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.file-card {
  min-height: 66px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
}

.file-type-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--teal-soft);
  color: var(--teal);
}

.file-type-icon svg,
.audio-label svg {
  width: 18px;
}

.file-details {
  min-width: 0;
  flex: 1;
  display: grid;
}

.file-details strong {
  overflow: hidden;
  font-size: 0.87rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-details span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.75rem;
}

.icon-button {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border: 1px solid transparent;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--line);
  background: #ffffff;
  color: var(--danger);
}

.icon-button svg {
  width: 18px;
}

.audio-row {
  padding: 12px;
}

.audio-label {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

audio {
  width: 100%;
  height: 42px;
  margin-top: 9px;
}

.settings-panel {
  display: grid;
  gap: 18px;
  align-content: start;
}

.settings-panel .panel-heading {
  margin-bottom: 0;
}

.field {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  gap: 9px;
}

.hidden-field {
  display: none;
}

.field > label,
.field legend {
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
}

.segmented label {
  min-width: 0;
  cursor: pointer;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented span {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 4px;
  background: var(--surface-subtle);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.segmented svg {
  width: 17px;
  height: 17px;
}

.segmented label:hover span {
  border-color: var(--line-strong);
  background: #ffffff;
}

.segmented label:has(input:checked) span {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
  box-shadow: inset 0 0 0 1px var(--primary);
}

.hint {
  min-height: 46px;
  margin: 0;
  padding: 9px 10px;
  border-left: 3px solid var(--teal);
  border-radius: 0 6px 6px 0;
  display: flex;
  align-items: flex-start;
  gap: 7px;
  background: var(--teal-soft);
  color: #386a63;
  font-size: 0.72rem;
  line-height: 1.45;
}

.hint svg {
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
  margin-top: 1px;
}

.primary-button,
.download-button {
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: background 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.primary-button:hover:not(:disabled),
.download-button:hover {
  background: var(--primary-dark);
  box-shadow: 0 8px 20px rgba(37, 86, 216, 0.2);
  transform: translateY(-1px);
}

.primary-button:disabled {
  background: #aeb7c5;
  cursor: not-allowed;
  opacity: 0.72;
}

.primary-button svg,
.download-button svg {
  width: 18px;
}

.progress-panel,
.result-panel {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.progress-panel {
  padding: 18px 20px;
}

.progress-main {
  display: flex;
  align-items: center;
  gap: 12px;
}

.progress-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
}

.progress-icon svg {
  width: 19px;
}

.progress-copy {
  min-width: 0;
  flex: 1;
  display: grid;
}

.progress-copy strong {
  margin-top: 2px;
  overflow: hidden;
  font-size: 0.85rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.progress-value {
  min-width: 42px;
  color: var(--primary);
  font-size: 0.88rem;
  text-align: right;
}

.meter {
  height: 7px;
  margin-top: 14px;
  overflow: hidden;
  border-radius: 4px;
  background: #e9edf2;
}

.meter div {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
  transition: width 180ms ease;
}

.meter.processing {
  position: relative;
}

.meter.processing div {
  position: absolute;
  width: 34% !important;
  animation: processing-slide 1.35s ease-in-out infinite;
}

.chunk-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
  gap: 7px;
  padding: 0;
  margin: 13px 0 0;
  list-style: none;
}

.chunk-list:empty {
  display: none;
}

.chunk-list li {
  min-height: 34px;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: var(--surface-subtle);
  color: var(--muted);
  font-size: 0.7rem;
}

.chunk-list li strong {
  font-size: 0.68rem;
}

.chunk-list .uploading strong {
  color: var(--orange);
}

.chunk-list .done strong {
  color: var(--teal);
}

.chunk-list .error strong {
  color: var(--danger);
}

.result-panel {
  padding: 20px;
  border-left: 4px solid var(--teal);
}

.result-heading,
.result-actions {
  display: flex;
  align-items: center;
}

.result-heading {
  gap: 12px;
}

.success-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--teal-soft);
  color: var(--teal);
}

.success-icon svg {
  width: 22px;
}

.result-heading .eyebrow {
  margin-bottom: 3px;
  color: var(--teal);
}

.result-actions {
  gap: 14px;
  margin-top: 16px;
}

.result-actions audio {
  flex: 1;
  margin: 0;
}

.download-button {
  min-width: 164px;
  padding: 0 17px;
  background: var(--teal);
}

.download-button:hover {
  background: #06685c;
  box-shadow: 0 8px 20px rgba(8, 127, 112, 0.18);
}

.benchmark-result {
  margin-top: 20px;
}

.benchmark-summary {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.benchmark-summary > div {
  min-width: 0;
  padding: 16px;
  display: grid;
  gap: 4px;
}

.benchmark-summary > div + div {
  border-left: 1px solid var(--line);
}

.benchmark-summary span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.benchmark-summary strong {
  color: var(--teal);
  font-size: 1.35rem;
  line-height: 1.2;
}

.comparison-audio {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.comparison-audio > div {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  column-gap: 9px;
  background: var(--surface-subtle);
}

.comparison-index {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 900;
}

.comparison-audio > div > div {
  min-width: 0;
  display: grid;
}

.comparison-audio strong {
  overflow: hidden;
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.comparison-audio small {
  color: var(--muted);
  font-size: 0.66rem;
}

.comparison-audio audio {
  grid-column: 1 / -1;
}

.metric-table {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.metric-table > div {
  min-height: 48px;
  padding: 9px 4px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(190px, 1.6fr) minmax(80px, 0.7fr) minmax(80px, 0.7fr);
  align-items: center;
  gap: 16px;
}

.metric-table .metric-head {
  min-height: 38px;
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 800;
  text-transform: uppercase;
}

.metric-table > div > span:first-child {
  font-size: 0.77rem;
  font-weight: 750;
}

.metric-table small {
  display: block;
  color: var(--muted);
  font-size: 0.64rem;
  font-weight: 500;
}

.metric-table strong {
  font-size: 0.8rem;
}

.validation-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.validation-badge {
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid #b9ded5;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--teal-soft);
  color: #17675d;
  font-size: 0.7rem;
  font-weight: 800;
}

.validation-badge.failed {
  border-color: #ecd1d3;
  background: #fff3f3;
  color: var(--danger);
}

.validation-badge svg {
  width: 14px;
  height: 14px;
}

.benchmark-footer {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.benchmark-footer > span {
  color: var(--muted);
  font-size: 0.7rem;
}

.benchmark-footer .download-button {
  min-width: 188px;
  padding: 0 16px;
}

.app-footer {
  min-height: 62px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #8792a3;
  font-size: 0.7rem;
}

@keyframes status-pulse {
  50% {
    opacity: 0.45;
  }
}

@keyframes processing-slide {
  0% {
    left: -34%;
  }

  100% {
    left: 100%;
  }
}

@media (max-width: 850px) {
  .page-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }

  .control-grid {
    grid-template-columns: 1fr;
  }

  .settings-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .settings-panel .panel-heading,
  .settings-panel .primary-button {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .app-shell {
    width: min(100% - 24px, 1180px);
  }

  .app-header {
    min-height: 68px;
  }

  .brand small {
    display: none;
  }

  .runtime-status {
    min-width: 0;
    padding: 0 10px;
  }

  .workspace {
    padding-top: 32px;
  }

  .page-heading {
    margin-bottom: 22px;
  }

  h1 {
    font-size: 2rem;
  }

  .lead {
    font-size: 0.9rem;
  }

  .output-specs {
    width: 100%;
  }

  .output-specs > div {
    min-width: 0;
    flex: 1;
  }

  .upload-panel,
  .settings-panel {
    padding: 16px;
  }

  .dropzone {
    min-height: 230px;
    padding: 22px 16px;
  }

  .settings-panel {
    grid-template-columns: 1fr;
  }

  .settings-panel .panel-heading,
  .settings-panel .primary-button {
    grid-column: auto;
  }

  .progress-panel,
  .result-panel {
    padding: 16px;
  }

  .progress-copy strong {
    white-space: normal;
  }

  .result-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .mode-switch small {
    display: none;
  }

  .comparison-audio {
    grid-template-columns: 1fr;
  }

  .benchmark-summary > div {
    padding: 12px 8px;
  }

  .benchmark-summary strong {
    font-size: 1.05rem;
  }

  .metric-table > div {
    grid-template-columns: minmax(145px, 1.4fr) minmax(62px, 0.6fr) minmax(62px, 0.6fr);
    gap: 8px;
  }

  .benchmark-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .download-button {
    width: 100%;
  }

  .app-footer {
    justify-content: center;
  }

  .app-footer span:last-child {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}