*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --wood-dark: #2c1810;
  --wood-mid: #5c3a1e;
  --wood-light: #8b5a2b;
  --wood-panel: #a67c4e;
  --wood-pale: #c4a87a;
  --parchment: #f2e6ce;
  --parchment-light: #faf3e6;
  --leaf-green: #4a7c3f;
  --leaf-dark: #2d5a27;
  --water-blue: #3b82a4;
  --water-light: #6bb4d4;
  --amber: #d4a017;
  --amber-glow: #f0c040;
  --rust: #8b3a2a;
  --text-dark: #2c1810;
  --text-mid: #5c3a1e;
  --text-light: #8b7355;
  --border-wood: #7a4e2d;
  --shadow-wood: rgba(44, 24, 16, 0.3);
  --radius: 10px;
  --radius-sm: 6px;
}

body {
  font-family: "Georgia", "Noto Serif SC", "Songti SC", serif;
  background: var(--parchment);
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(139, 90, 43, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(74, 124, 63, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(59, 130, 164, 0.04) 0%, transparent 50%);
  color: var(--text-dark);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ───── Header ───── */
.app-header {
  background: linear-gradient(180deg, var(--wood-dark) 0%, var(--wood-mid) 100%);
  border-bottom: 4px solid var(--wood-light);
  padding: 0;
  position: relative;
  overflow: hidden;
}

.app-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0px,
      transparent 28px,
      rgba(255, 255, 255, 0.03) 28px,
      rgba(255, 255, 255, 0.03) 30px
    );
  pointer-events: none;
}

.app-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--wood-light) 0px,
    var(--wood-light) 20px,
    var(--wood-mid) 20px,
    var(--wood-mid) 24px,
    var(--wood-light) 24px,
    var(--wood-light) 44px,
    var(--wood-mid) 44px,
    var(--wood-mid) 48px
  );
}

.app-header .container {
  padding: 28px 20px 22px;
  position: relative;
}

.app-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--parchment-light);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-header h1::before {
  content: "";
  display: inline-block;
  width: 36px;
  height: 36px;
  background: var(--amber);
  clip-path: polygon(50% 0%, 83% 12%, 100% 43%, 94% 78%, 68% 100%, 32% 100%, 6% 78%, 0% 43%, 17% 12%);
  flex-shrink: 0;
}

.app-header .subtitle {
  font-size: 0.85rem;
  color: var(--wood-pale);
  margin-top: 4px;
  padding-left: 48px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* ───── Cards ───── */
.card {
  background:
    linear-gradient(135deg, var(--parchment-light) 0%, var(--parchment) 100%);
  border: 2px solid var(--wood-panel);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
  box-shadow:
    0 2px 8px var(--shadow-wood),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  height: 4px;
  background: linear-gradient(90deg, var(--wood-panel), var(--amber), var(--wood-panel));
  border-radius: var(--radius) var(--radius) 0 0;
  pointer-events: none;
}

.card h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--wood-dark);
  margin-bottom: 4px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--wood-pale);
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 16px;
  font-style: italic;
}

/* ───── Form Elements ───── */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--wood-mid);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--wood-pale);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--parchment-light);
  color: var(--text-dark);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--wood-light);
  box-shadow: 0 0 0 3px rgba(139, 90, 43, 0.15);
}

.form-group input[type="file"] {
  padding: 8px;
  font-size: 0.85rem;
  background: var(--parchment-light);
}

.form-group input[type="file"]::file-selector-button {
  padding: 6px 14px;
  border: 2px solid var(--wood-light);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, var(--wood-panel) 0%, var(--wood-light) 100%);
  color: var(--parchment-light);
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  margin-right: 10px;
  transition: background 0.2s;
}

.form-group input[type="file"]::file-selector-button:hover {
  background: linear-gradient(180deg, var(--wood-light) 0%, var(--wood-mid) 100%);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.hint {
  display: block;
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 4px;
  font-style: italic;
}

/* ───── Buttons ───── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: 2px solid var(--wood-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  letter-spacing: 0.03em;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(180deg, var(--wood-panel) 0%, var(--wood-light) 100%);
  color: var(--parchment-light);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  border-color: var(--wood-light);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(180deg, var(--wood-light) 0%, var(--wood-mid) 100%);
  border-color: var(--wood-mid);
  box-shadow: 0 2px 8px var(--shadow-wood);
}

.btn-secondary {
  background: linear-gradient(180deg, var(--wood-pale) 0%, var(--wood-panel) 100%);
  color: var(--text-dark);
  border-color: var(--wood-panel);
}

.btn-secondary:hover {
  background: linear-gradient(180deg, var(--wood-panel) 0%, var(--wood-light) 100%);
  color: var(--parchment-light);
}

.btn-danger {
  background: transparent;
  color: var(--rust);
  border: 2px solid var(--rust);
  padding: 4px 12px;
  font-size: 0.8rem;
}

.btn-danger:hover {
  background: var(--rust);
  color: var(--parchment-light);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hidden {
  display: none !important;
}

/* ───── Result Boxes ───── */
.result-box {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  border: 2px solid;
}

.result-box.success {
  background: #f0f7ec;
  border-color: var(--leaf-green);
  color: var(--leaf-dark);
}

.result-box.error {
  background: #fdf0ed;
  border-color: var(--rust);
  color: var(--rust);
}

/* ───── Voice List ───── */
.empty-state {
  color: var(--text-light);
  font-size: 0.85rem;
  text-align: center;
  padding: 24px 0;
  font-style: italic;
}

.voice-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--wood-pale);
}

.voice-item:last-child {
  border-bottom: none;
}

.voice-item + .voice-item {
  border-top: 1px solid var(--wood-pale);
}

.voice-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--wood-dark);
}

.voice-info p {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 2px;
}

/* ───── TTS Result ───── */
#tts-result {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

#tts-audio {
  flex: 1;
  min-width: 200px;
  filter: sepia(0.3) hue-rotate(330deg);
}

#tts-audio::-webkit-media-controls-panel {
  background: var(--parchment);
}

#tts-download {
  flex-shrink: 0;
}

/* ───── Footer ───── */
.app-footer {
  text-align: center;
  padding: 24px 0;
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--text-light);
  border-top: 2px solid var(--wood-pale);
  background: linear-gradient(0deg, rgba(139, 90, 43, 0.06) 0%, transparent 100%);
}

.app-footer a {
  color: var(--wood-light);
  text-decoration: none;
  font-weight: 500;
}

.app-footer a:hover {
  color: var(--wood-mid);
  text-decoration: underline;
}

/* ───── Scrollbar ───── */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--parchment);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb {
  background: var(--wood-pale);
  border-radius: 5px;
  border: 2px solid var(--parchment);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--wood-panel);
}

/* ───── Dividers ───── */
hr {
  border: none;
  border-top: 2px solid var(--wood-pale);
  margin: 16px 0;
  position: relative;
}

/* ───── Section Heading ───── */
#cloned-voices + h3 {
  font-size: 0.95rem;
  color: var(--wood-mid);
  font-weight: 600;
}