:root {
  --bg: #0F2E2B;
  --surface: #15403A;
  --surface-raised: #1B4D45;
  --accent: #E0922E;
  --accent-strong: #F0A744;
  --text: #F3ECDD;
  --text-muted: #9FBDB6;
  --error: #C7402B;
  --border: rgba(243, 236, 221, 0.12);

  --font-display: 'Fraunces', serif;
  --font-body: 'Work Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 24px 20px calc(48px + env(safe-area-inset-bottom));
  min-height: 100vh;
}

.app-header { margin-bottom: 28px; }

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

.brand-mark {
  color: var(--accent);
  flex-shrink: 0;
}

h1 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Tabs */
.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  background: var(--surface);
  padding: 4px;
  border-radius: 12px;
  margin-bottom: 22px;
}

.tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 10px 4px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tab.is-active {
  background: var(--accent);
  color: #1A1206;
}

.tab:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

/* Panels */
.panel { display: none; }
.panel.is-active { display: block; }

.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.field-label--secondary { margin-top: 18px; }

.field-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: -4px 0 10px;
}

textarea,
input[type="file"],
input[type="number"] {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
}

textarea {
  resize: vertical;
  min-height: 110px;
}

textarea:focus,
input:focus {
  outline: none;
  border-color: var(--accent);
}

.char-count {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 6px 0 0;
}

/* Voice selector */
.voice-select { margin: 22px 0 18px; }

.voice-options {
  display: flex;
  gap: 8px;
}

.voice-pill {
  position: relative;
  flex: 1;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.voice-pill input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}

.voice-pill:has(input:checked) {
  border-color: var(--accent);
  background: rgba(224, 146, 46, 0.14);
}

/* Submit */
.primary-btn {
  width: 100%;
  background: var(--accent);
  color: #1A1206;
  border: none;
  border-radius: 12px;
  padding: 15px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.primary-btn:hover { background: var(--accent-strong); }
.primary-btn:active { transform: scale(0.99); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Status / waveform (signature element) */
.status {
  margin-top: 26px;
  text-align: center;
}

.waveform {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 5px;
  height: 36px;
  margin-bottom: 10px;
}

.waveform span {
  width: 4px;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  animation: wave 1.1s ease-in-out infinite;
}

.waveform span:nth-child(2) { animation-delay: 0.1s; }
.waveform span:nth-child(3) { animation-delay: 0.2s; }
.waveform span:nth-child(4) { animation-delay: 0.3s; }
.waveform span:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
  0%, 100% { transform: scaleY(0.3); }
  50% { transform: scaleY(1); }
}

@media (prefers-reduced-motion: reduce) {
  .waveform span { animation: none; transform: scaleY(0.7); }
}

#status-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* Result */
.result {
  margin-top: 26px;
  background: var(--surface);
  border-radius: 14px;
  padding: 18px;
}

.result-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.5;
  margin: 0 0 16px;
}

audio { width: 100%; }

.download-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* Error */
.error {
  margin-top: 20px;
  background: rgba(199, 64, 43, 0.14);
  border: 1px solid var(--error);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--text);
}

[hidden] { display: none !important; }