/* ── Design tokens ─────────────────────────────────────────────────────────── */
:root {
  --clr-bg:          #F3F4F6;
  --clr-surface:     #FFFFFF;
  --clr-border:      #E5E7EB;
  --clr-text:        #111827;
  --clr-muted:       #6B7280;
  --clr-primary:     #4F46E5;
  --clr-primary-h:   #4338CA;
  --clr-success:     #059669;
  --clr-success-h:   #047857;
  --clr-danger:      #DC2626;
  --clr-danger-h:    #B91C1C;
  --clr-warning:     #D97706;
  --radius:          12px;
  --radius-sm:       8px;
  --shadow:          0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --transition:      .15s ease;
  --font:            -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── Reset / base ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--clr-bg);
  color: var(--clr-text);
  min-height: 100dvh;
  line-height: 1.6;
}

/* ── App layout ─────────────────────────────────────────────────────────────── */
#app { display: flex; flex-direction: column; min-height: 100dvh; }

/* ── Header ─────────────────────────────────────────────────────────────────── */
.app-header {
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--clr-primary);
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.logo svg { flex-shrink: 0; }

/* ── Step indicator ──────────────────────────────────────────────────────────── */
.step-indicator {
  display: flex;
  align-items: center;
  gap: 0;
}

.step-dot {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--clr-border);
  color: var(--clr-muted);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.step-dot.active {
  background: var(--clr-primary);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(79,70,229,.2);
}

.step-dot.done {
  background: var(--clr-success);
  color: #fff;
}

.step-line {
  width: 32px;
  height: 2px;
  background: var(--clr-border);
  transition: background var(--transition);
}

.step-label {
  font-size: 13px;
  color: var(--clr-muted);
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Error banner ────────────────────────────────────────────────────────────── */
.error-banner {
  background: #FEF2F2;
  border-bottom: 2px solid #FECACA;
  color: var(--clr-danger);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
}

/* ── Main content ────────────────────────────────────────────────────────────── */
.main-content {
  flex: 1;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 60px;
}

/* ── Step sections ───────────────────────────────────────────────────────────── */
.step-section { display: none; }
.step-section.active { display: block; }

/* ── Card ────────────────────────────────────────────────────────────────────── */
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--clr-border);
}

.card-header--success {
  background: linear-gradient(135deg, #ECFDF5, #D1FAE5);
  text-align: center;
  padding: 36px 28px 24px;
}

.step-badge {
  display: inline-block;
  background: #EEF2FF;
  color: var(--clr-primary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.card-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.3;
}

.card-subtitle {
  margin-top: 6px;
  font-size: 14px;
  color: var(--clr-muted);
  max-width: 560px;
}

.success-icon {
  width: 72px;
  height: 72px;
  background: var(--clr-success);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.card-footer {
  padding: 20px 28px;
  border-top: 1px solid var(--clr-border);
  background: #FAFAFA;
  display: flex;
  justify-content: flex-end;
}

.card-footer--split {
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.footer-left { display: flex; gap: 10px; align-items: center; }

/* ── Script panel ────────────────────────────────────────────────────────────── */
.script-panel {
  margin: 20px 28px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.script-panel-label {
  display: flex;
  align-items: center;
  gap: 7px;
  background: #F9FAFB;
  border-bottom: 1px solid var(--clr-border);
  padding: 9px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--clr-muted);
  letter-spacing: .03em;
  text-transform: uppercase;
}

.script-text {
  padding: 18px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--clr-text);
  max-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── Recording area ──────────────────────────────────────────────────────────── */
.record-area {
  padding: 20px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Status row */
.rec-status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 24px;
}

.rec-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #D1D5DB;
  flex-shrink: 0;
  transition: background var(--transition);
}

.rec-dot.active {
  background: var(--clr-danger);
  animation: pulse-rec 1s ease-in-out infinite;
}

@keyframes pulse-rec {
  0%, 100% { opacity: 1; transform: scale(1);   box-shadow: 0 0 0 0 rgba(220,38,38,.5); }
  50%       { opacity: .9; transform: scale(1.2); box-shadow: 0 0 0 5px rgba(220,38,38,0); }
}

.rec-status-text {
  font-size: 14px;
  color: var(--clr-muted);
  flex: 1;
}

.rec-timer {
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--clr-text);
  letter-spacing: .04em;
}

/* Level meter */
.level-meter {
  height: 8px;
  background: var(--clr-border);
  border-radius: 4px;
  overflow: hidden;
}

.level-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6EE7B7, #34D399, #059669);
  border-radius: 4px;
  transition: width .08s linear;
}

/* Controls */
.rec-controls { display: flex; gap: 12px; flex-wrap: wrap; }

/* Preview */
.rec-preview { display: flex; flex-direction: column; gap: 8px; }

.preview-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.audio-el {
  width: 100%;
  height: 40px;
  accent-color: var(--clr-primary);
}

/* ── Step 2 — Generation status ───────────────────────────────────────────────── */
.gen-status {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 28px 0;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}

.gen-status--generating { background: #EEF2FF; color: var(--clr-primary); }
.gen-status--loading    { background: #EEF2FF; color: var(--clr-primary); }
.gen-status--ready      { background: #ECFDF5; color: var(--clr-success); }
.gen-status--error      { background: #FEF2F2; color: var(--clr-danger); }

/* Spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2.5px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex-shrink: 0;
}

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

/* Step-level error */
.step-error {
  margin: 12px 28px 0;
  padding: 12px 16px;
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--clr-danger);
}

/* Audio player wrap */
.audio-player-wrap {
  margin: 20px 28px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.audio-player-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.audio-hint {
  font-size: 12px;
  color: var(--clr-muted);
  font-style: italic;
}

/* ── Step 3 — Summary ────────────────────────────────────────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--clr-border);
  margin: 24px 28px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.summary-item {
  background: var(--clr-surface);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.summary-item:last-child { grid-column: 1 / -1; }

.summary-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.summary-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--clr-text);
}

.summary-value--mono { font-family: 'Courier New', monospace; font-size: 13px; }

.download-link {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 28px 20px;
  color: var(--clr-primary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  padding: 10px 16px;
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  width: fit-content;
  transition: background var(--transition);
}

.download-link:hover { background: #EEF2FF; }

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
}

.btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--clr-primary-h); }

.btn-success {
  background: var(--clr-success);
  color: #fff;
}
.btn-success:hover:not(:disabled) { background: var(--clr-success-h); }

.btn-record {
  background: var(--clr-danger);
  color: #fff;
  padding: 12px 24px;
  font-size: 15px;
}
.btn-record:hover:not(:disabled) { background: var(--clr-danger-h); }

.btn-stop {
  background: #374151;
  color: #fff;
  padding: 12px 24px;
  font-size: 15px;
}
.btn-stop:hover:not(:disabled) { background: #1F2937; }

.btn-secondary {
  background: var(--clr-bg);
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
}
.btn-secondary:hover:not(:disabled) { background: #E5E7EB; }

.btn-ghost {
  background: transparent;
  color: var(--clr-muted);
  border: 1px solid var(--clr-border);
}
.btn-ghost:hover:not(:disabled) { background: var(--clr-bg); color: var(--clr-text); }

/* ── Custom Text Generator ───────────────────────────────────────────────────── */
.custom-gen-section {
  margin: 0 28px 24px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.custom-gen-header {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F9FAFB;
  border-bottom: 1px solid var(--clr-border);
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--clr-muted);
  letter-spacing: .03em;
  text-transform: uppercase;
}

.custom-textarea {
  width: 100%;
  padding: 14px 16px;
  border: none;
  border-bottom: 1px solid var(--clr-border);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--clr-text);
  background: var(--clr-surface);
  resize: vertical;
  min-height: 100px;
  outline: none;
  transition: background var(--transition);
}

.custom-textarea:focus {
  background: #FAFBFF;
  box-shadow: inset 0 0 0 2px var(--clr-primary);
}

.custom-textarea::placeholder { color: #9CA3AF; }

.custom-gen-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #F9FAFB;
  border-bottom: 1px solid var(--clr-border);
  gap: 12px;
}

.char-count {
  font-size: 12px;
  color: var(--clr-muted);
  flex-shrink: 0;
}

/* inner status + error + player inside the custom section */
.custom-gen-section .gen-status,
.custom-gen-section .step-error,
.custom-gen-section .audio-player-wrap {
  margin: 12px 14px;
  border-radius: var(--radius-sm);
}

/* ── STT — button row + result box ──────────────────────────────────────────── */
.stt-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.btn-stt {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  background: #EEF2FF;
  color: var(--clr-primary);
  border: 1px solid #C7D2FE;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
  white-space: nowrap;
  font-family: var(--font);
}

.btn-stt:hover:not(:disabled) { background: #E0E7FF; }

.btn-stt:disabled {
  opacity: .4;
  cursor: not-allowed;
}

.btn-stt.loading {
  opacity: .7;
  pointer-events: none;
}

.stt-status {
  font-size: 12px;
  color: var(--clr-muted);
  font-style: italic;
}

.stt-result {
  margin-top: 10px;
  background: #F0FDF4;
  border: 1px solid #86EFAC;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.stt-result-label {
  background: #DCFCE7;
  border-bottom: 1px solid #86EFAC;
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 700;
  color: var(--clr-success);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.stt-result-text {
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--clr-text);
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
}

.stt-copy-btn {
  display: block;
  width: 100%;
  padding: 7px 14px;
  text-align: right;
  font-size: 12px;
  font-weight: 600;
  color: var(--clr-success);
  background: transparent;
  border: none;
  border-top: 1px solid #86EFAC;
  cursor: pointer;
  font-family: var(--font);
  transition: background var(--transition);
}

.stt-copy-btn:hover { background: #DCFCE7; }
.stt-copy-btn.copied { color: var(--clr-muted); }

/* ── Utility ─────────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Scrollbar ───────────────────────────────────────────────────────────────── */
.script-text::-webkit-scrollbar { width: 6px; }
.script-text::-webkit-scrollbar-track { background: transparent; }
.script-text::-webkit-scrollbar-thumb { background: #D1D5DB; border-radius: 3px; }

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .header-inner { padding: 0 16px; }
  .step-label   { display: none; }
  .main-content { padding: 16px 12px 48px; }
  .card-header,
  .card-footer,
  .record-area,
  .script-panel,
  .gen-status,
  .step-error,
  .audio-player-wrap,
  .summary-grid,
  .download-link { margin-left: 0; margin-right: 0; padding-left: 16px; padding-right: 16px; }
  .card-footer--split { flex-direction: column-reverse; align-items: stretch; }
  .card-footer--split .footer-left { justify-content: center; }
  .btn-primary, .btn-success { width: 100%; justify-content: center; }
  .summary-grid { grid-template-columns: 1fr; }
  .summary-item:last-child { grid-column: auto; }
  .step-line { width: 20px; }
}