:root {
  --audio-surface: #ffffff;
  --audio-border: #dbe2f1;
  --audio-border-strong: #b7c4dd;
  --audio-muted: #6c7a96;
  --audio-accent: #0d6efd;
  --audio-accent-soft: rgba(13, 110, 253, 0.08);
  --audio-radius-lg: 18px;
  --audio-radius: 14px;
  --audio-radius-sm: 10px;
  --audio-shadow: 0 24px 60px rgba(15, 23, 42, 0.12), 0 4px 18px rgba(15, 23, 42, 0.08);
  --audio-gradient: linear-gradient(135deg, #0d6efd, #6f42c1);
}

.audio-tool {
  margin-bottom: 48px;
}

.audio-tool__intro {
  background: var(--audio-surface);
  border: 1px solid var(--audio-border);
  border-radius: var(--audio-radius-lg);
  padding: 28px 32px;
  margin-bottom: 28px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

.audio-tool__title {
  font-size: 28px;
  font-weight: 700;
  color: #10172a;
  margin-bottom: 8px;
}

.audio-tool__subtitle {
  margin: 0;
  color: var(--audio-muted);
  font-size: 16px;
}

.audio-tool__body {
  display: grid;
  gap: 28px;
}

@media (min-width: 1024px) {
  .audio-tool__body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    align-items: start;
  }
}

.audio-tool__form {
  background: var(--audio-surface);
  border: 1px solid var(--audio-border);
  border-radius: var(--audio-radius-lg);
  box-shadow: var(--audio-shadow);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.audio-tool__form h2,
.audio-tool__form h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.audio-tool__upload {
  display: grid;
  gap: 20px;
}

.audio-dropzone {
  border: 2px dashed var(--audio-border-strong);
  border-radius: var(--audio-radius-lg);
  padding: 28px;
  text-align: center;
  background: rgba(255, 255, 255, 0.9);
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  cursor: pointer;
}

.audio-dropzone:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.2);
}

.audio-dropzone[data-dragover="true"],
.audio-dropzone:hover {
  border-color: var(--audio-accent);
  background: var(--audio-accent-soft);
}

.audio-dropzone__icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 16px auto;
  border-radius: 50%;
  background: var(--audio-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--audio-accent);
}

.audio-dropzone__title {
  font-weight: 600;
  margin-bottom: 4px;
}

.audio-dropzone__hint {
  font-size: 14px;
  color: var(--audio-muted);
  margin: 0;
}

.audio-dropzone__support {
  font-size: 13px;
  margin-top: 12px;
  color: #475569;
}

.audio-dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0.001;
  cursor: pointer;
}

.audio-tool__preview {
  border: 1px solid var(--audio-border);
  border-radius: var(--audio-radius-lg);
  background: #f8fafc;
  padding: 20px;
  display: grid;
  gap: 16px;
}

.audio-preview__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 14px;
  color: #1f2937;
}

.audio-preview__player {
  display: grid;
  gap: 12px;
}

.audio-preview__timeline {
  display: flex;
  align-items: center;
  gap: 12px;
}

.audio-preview__time {
  font-variant-numeric: tabular-nums;
  color: var(--audio-muted);
  min-width: 90px;
  text-align: right;
}

.audio-preview__canvas {
  width: 100%;
  height: 120px;
  border-radius: var(--audio-radius);
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.08), rgba(79, 70, 229, 0.12));
  display: block;
}

.audio-preview__wave-empty {
  border-radius: var(--audio-radius);
  padding: 20px;
  background: rgba(13, 110, 253, 0.05);
  text-align: center;
  font-size: 14px;
  color: var(--audio-muted);
}

.audio-tool__options {
  display: grid;
  gap: 20px;
}

.audio-field {
  display: grid;
  gap: 8px;
}

.audio-field label {
  font-weight: 600;
  color: #10172a;
}

.audio-field select,
.audio-field input,
.audio-field textarea {
  border-radius: var(--audio-radius);
  border: 1px solid var(--audio-border);
  padding: 12px 14px;
  font-size: 15px;
}

.audio-field textarea {
  min-height: 140px;
  resize: vertical;
}

.audio-slider {
  display: grid;
  gap: 8px;
}

.audio-slider__track {
  display: flex;
  align-items: center;
  gap: 12px;
}

.audio-slider__value {
  min-width: 72px;
  font-variant-numeric: tabular-nums;
  color: var(--audio-muted);
  font-size: 14px;
}

.audio-slider input[type="range"] {
  flex: 1;
  appearance: none;
  height: 6px;
  border-radius: 999px;
  background: #e2e8f0;
  outline: none;
}

.audio-slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--audio-accent);
  box-shadow: 0 6px 14px rgba(13, 110, 253, 0.3);
  cursor: pointer;
}

.audio-slider input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--audio-accent);
  box-shadow: 0 6px 14px rgba(13, 110, 253, 0.3);
  cursor: pointer;
  border: none;
}

.audio-advanced {
  border-radius: var(--audio-radius-lg);
  border: 1px solid var(--audio-border);
  background: #f8fafc;
  padding: 16px 20px;
}

.audio-advanced summary {
  font-weight: 600;
  color: #10172a;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.audio-advanced summary::-webkit-details-marker {
  display: none;
}

.audio-advanced summary::after {
  content: '▾';
  position: absolute;
  right: 0;
  top: 0;
  color: var(--audio-muted);
  transition: transform 0.2s ease;
}

.audio-advanced[open] summary::after {
  transform: rotate(180deg);
}

.audio-advanced__content {
  margin-top: 16px;
  display: grid;
  gap: 16px;
}

.audio-tool__submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  border: none;
  background: var(--audio-gradient);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.audio-tool__submit:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.25);
}

.audio-tool__submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 35px rgba(13, 110, 253, 0.28);
}

.audio-tool__submit[disabled] {
  opacity: 0.6;
  cursor: wait;
  box-shadow: none;
}

.audio-progress {
  border-radius: var(--audio-radius-lg);
  border: 1px solid rgba(13, 110, 253, 0.2);
  background: rgba(13, 110, 253, 0.05);
  padding: 18px 20px;
  display: grid;
  gap: 12px;
}

.audio-progress__bar {
  height: 6px;
  border-radius: 999px;
  background: rgba(13, 110, 253, 0.2);
  position: relative;
  overflow: hidden;
}

.audio-progress__bar span {
  position: absolute;
  inset: 0;
  width: 0%;
  background: var(--audio-gradient);
  border-radius: inherit;
  transition: width 0.3s ease;
}

.audio-progress__text {
  font-size: 14px;
  color: var(--audio-muted);
}

.audio-tool__aside {
  background: var(--audio-surface);
  border: 1px solid var(--audio-border);
  border-radius: var(--audio-radius-lg);
  padding: 28px;
  box-shadow: var(--audio-shadow);
  display: grid;
  gap: 16px;
}

.audio-tool__aside h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
}

.audio-tool__aside p,
.audio-tool__aside li {
  color: var(--audio-muted);
  font-size: 15px;
}

.audio-tool__aside ul {
  padding-left: 20px;
  margin: 0;
  display: grid;
  gap: 6px;
}

.audio-error {
  margin-top: 24px;
  border-radius: var(--audio-radius);
  border: 1px solid rgba(220, 53, 69, 0.3);
  background: rgba(220, 53, 69, 0.1);
  padding: 16px 20px;
  color: #8a1023;
  font-weight: 600;
}

.audio-playlist {
  display: grid;
  gap: 12px;
}

.audio-playlist__item {
  border-radius: var(--audio-radius);
  border: 1px solid var(--audio-border);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
  font-size: 14px;
  color: #1f2937;
}

.audio-playlist__item span {
  color: var(--audio-muted);
  font-variant-numeric: tabular-nums;
}

.audio-tool__note {
  font-size: 14px;
  color: var(--audio-muted);
}

[data-audio-progress="running"] .audio-tool__submit {
  pointer-events: none;
}

[data-audio-progress="running"] .audio-tool__submit::after {
  content: '';
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-top-color: #fff;
  animation: audio-spinner 0.8s linear infinite;
}

@keyframes audio-spinner {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.audio-tool__help {
  border-radius: var(--audio-radius);
  background: rgba(13, 110, 253, 0.05);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--audio-muted);
}

.audio-tool__inline {
  display: grid;
  gap: 16px;
}

@media (min-width: 768px) {
  .audio-tool__inline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.audio-tool__inline .audio-field,
.audio-tool__inline .audio-slider {
  margin: 0;
}

.audio-tool__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.audio-language-grid {
  display: grid;
  gap: 12px;
}

@media (min-width: 600px) {
  .audio-language-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.audio-tool__empty {
  padding: 16px;
  background: rgba(148, 163, 184, 0.12);
  border-radius: var(--audio-radius);
  text-align: center;
  font-size: 14px;
  color: var(--audio-muted);
}

.audio-tool__pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(13, 110, 253, 0.12);
  color: #0d6efd;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.audio-tool__pill i {
  font-size: 14px;
}

.audio-field--inline {
  display: flex;
  gap: 12px;
  align-items: center;
}

.audio-field--inline input[type="number"] {
  width: 120px;
}