/* ============================================================
   TTS Studio — 3-Panel Layout
   ============================================================ */

:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b7280;
  --color-primary: #1e3a8a;
  --color-primary-hover: #172e73;
  --color-accent: #059669;
  --color-accent-hover: #047857;
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-badge-pending: #9ca3af;
  --color-badge-active: #1e3a8a;
  --color-badge-complete: #059669;
  --color-badge-failed: #dc2626;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --space: 16px;
  --bar-height: 48px;
  --file-panel-width: 240px;
  --sidebar-width: 280px;
  --inspector-width: 360px;
}

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

html { font-size: 14px; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  padding-top: var(--bar-height);
  overflow: hidden;
  height: 100vh;
}

/* ---- Top Bar ---- */
.top-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--bar-height);
  background: #121265;
  border-bottom: 1px solid #0d0d50;
  display: flex;
  align-items: center;
  padding: 0 12px;
  z-index: 100;
  gap: 8px;
}

.top-bar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  color: #ffffff;
  white-space: nowrap;
}
.brand-logo {
  width: 24px;
  height: 24px;
  border-radius: 4px;
}

/* ---- Split Bar (below raw text) ---- */
.split-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.split-bar[hidden] { display: none; }

.split-bar-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.split-bar-select {
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  background: var(--color-surface);
  color: var(--color-text);
}
.split-bar-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}

.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 6px;
  color: rgba(255,255,255,0.7);
}
.sidebar-toggle:hover { background: rgba(255,255,255,0.1); color: #ffffff; }

/* ---- 4-Panel Layout ---- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) var(--file-panel-width) 1fr 4px var(--inspector-width);
  height: calc(100vh - var(--bar-height));
  transition: grid-template-columns 0.25s ease;
}

.layout.sidebar-collapsed {
  grid-template-columns: 0px var(--file-panel-width) 1fr 4px var(--inspector-width);
}

.layout.resizing {
  transition: none;
}

/* ---- File Panel (always visible) ---- */
.file-panel {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow: hidden;
}

.file-panel-inner {
  width: var(--file-panel-width);
  height: 100%;
  overflow-y: auto;
  padding: var(--space) 12px;
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

.file-list-section {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.file-list-section .file-list {
  flex: 1;
  overflow-y: auto;
}

/* ---- Sidebar (config, collapsible) ---- */
.sidebar {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow: hidden;
  transition: width 0.25s ease;
}

.layout.sidebar-collapsed .sidebar {
  border-right: none;
}

.sidebar-inner {
  width: var(--sidebar-width);
  height: 100%;
  overflow-y: auto;
  padding: var(--space) 12px;
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

.sidebar-section {}
.sidebar-bottom { margin-top: auto; }

.session-info {
  padding: 10px;
  background: #f8f9fb;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.session-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.session-info-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.session-info-value {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text);
  text-align: right;
}
.session-token-value {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 140px;
}
.session-token-value:hover {
  color: var(--color-primary);
}

.sidebar-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  padding: 0 0 4px;
}

.sidebar-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

/* ---- Drop Zone (main panel) ---- */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
  margin-bottom: 12px;
}
.drop-zone.dragover {
  border-color: var(--color-primary);
  background: #eef0f9;
}
.drop-zone-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.drop-zone-content p { margin: 0; color: var(--color-text-secondary); font-size: 0.85rem; }
.drop-icon {
  width: 22px; height: 22px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

/* ---- File List ---- */
.file-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.sidebar-heading-row .sidebar-heading { margin-bottom: 0; }

.heading-actions {
  display: flex;
  gap: 4px;
}
.btn-heading-action {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.btn-heading-action:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-heading-danger:hover {
  color: var(--color-danger);
  border-color: var(--color-danger);
}
.btn-icon-only {
  padding: 2px 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  user-select: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 500;
  transition: background 0.1s;
  border: 1px solid transparent;
}
.file-item:hover { background: #f1f5f9; }
.file-item.dragging { opacity: 0.4; }
.file-item.drag-over { border-top: 2px solid var(--color-primary); }
.file-item.selected {
  background: #eef0f9;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.file-item .file-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-text-secondary);
  flex-shrink: 0;
}
.file-item.selected .file-dot { background: var(--color-primary); }
.file-item .file-dot.file-dot-done { background: var(--color-badge-complete); }
.file-item .file-dot.file-dot-failed { background: var(--color-badge-failed); }

.file-item .file-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.file-item .file-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .file-ids {
  font-size: 0.68rem;
  color: var(--color-text-secondary);
  font-weight: 400;
  font-family: var(--font-mono);
  opacity: 0.8;
}

.file-item .file-delete {
  opacity: 0;
  background: none; border: none; cursor: pointer;
  color: var(--color-text-secondary); font-size: 1.1rem; line-height: 1; padding: 0 2px;
}
.file-item:hover .file-delete { opacity: 1; }
.file-item .file-delete:hover { color: var(--color-danger); }

/* ---- Sidebar Config ---- */
.sidebar-config {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ---- Shared sc-field ---- */
.sc-field { display: flex; flex-direction: column; gap: 3px; }
.sc-field label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.sc-field select,
.sc-field input[type="text"],
.sc-field input[type="password"] {
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  background: var(--color-surface);
  width: 100%;
}
.sc-field select:focus,
.sc-field input[type="text"]:focus,
.sc-field input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}
.sc-field input[type="range"] {
  width: 100%;
  accent-color: var(--color-primary);
}

/* ---- API Key Modal ---- */
.apikey-overlay[hidden] { display: none; }
.apikey-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.45);
}
.apikey-card {
  background: var(--color-surface);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
  padding: 24px 28px;
  width: 420px;
  max-width: 90vw;
}
.apikey-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.apikey-header h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}
.apikey-hint {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  margin: 0 0 14px;
  line-height: 1.45;
}
.apikey-hint code {
  background: var(--color-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.8rem;
}
.apikey-field {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 16px;
}
.apikey-field input {
  flex: 1;
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid var(--color-border);
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--color-bg);
}
.apikey-field input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}
.apikey-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

/* ---- Splitting Indicator (file list) ---- */
.file-item .file-spinner {
  width: 14px; height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  flex-shrink: 0;
}

/* ---- Splitting Banner (center panel) ---- */
.splitting-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: #eef0f9;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  margin-bottom: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  animation: fade-in 0.2s ease-out;
}
.splitting-header {
  display: flex;
  align-items: center;
  gap: 10px;
}
.splitting-banner[hidden] { display: none; }
.btn-stop { margin-left: auto; }
.splitting-banner .spinner {
  width: 16px; height: 16px;
  border-width: 2px;
  border-top-color: var(--color-primary);
}
.log-panel {
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}
.log-panel[hidden] { display: none; }
.log-panel .accordion-toggle-sm {
  padding: 8px 14px;
  font-size: 0.8rem;
}
.log-output {
  margin: 0;
  padding: 10px 14px 14px;
  border-top: 1px solid var(--color-border);
  font-family: ui-monospace, 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.72rem;
  font-weight: 400;
  line-height: 1.6;
  color: #334155;
  min-height: 36px;
  max-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.log-output:empty::before {
  content: 'Waiting for API response...';
  color: #94a3b8;
  font-style: italic;
}
.log-output[hidden] { display: none; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

/* ---- Toggle Switch ---- */
.toggle-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  gap: 8px;
  text-transform: none;
  letter-spacing: 0;
}
.toggle-label input[type="checkbox"] { display: none; }
.toggle-switch {
  position: relative;
  width: 36px; height: 20px;
  background: var(--color-border);
  border-radius: 10px;
  flex-shrink: 0;
  transition: background 0.2s;
}
.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}
.toggle-label input:checked + .toggle-switch {
  background: var(--color-primary);
}
.toggle-label input:checked + .toggle-switch::after {
  transform: translateX(16px);
}

.sc-field.disabled select,
.sc-field.disabled input[type="text"] {
  opacity: 0.45;
  pointer-events: none;
  background: #f1f5f9;
}
.sc-field.disabled label {
  opacity: 0.45;
}

.radio-group { display: flex; gap: var(--space); }
.radio-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
  cursor: pointer;
  font-size: 0.85rem;
}

/* ---- Main Panel (center) ---- */
.main-panel {
  overflow-y: auto;
  padding: var(--space);
  background: var(--color-bg);
}

/* ---- File Raw Text ---- */
.file-text-area {
  margin-bottom: 12px;
}
.file-text-area[hidden] { display: none; }

.file-text-content {
  width: 100%;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text);
  white-space: pre-wrap;
  word-wrap: break-word;
  padding: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-height: 50vh;
  resize: vertical;
  margin: 0;
  font-family: var(--font-sans);
  tab-size: 2;
}
.file-text-content:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}
.file-text-content[hidden] { display: none; }

/* ---- Metadata Bar ---- */
.metadata-bar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}

.meta-tag {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 0.82rem;
  min-width: 0;
}
.meta-tag-label {
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}
.meta-tag-value {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta-bar-row {
  display: flex;
  align-items: end;
  gap: 12px;
}
.meta-bar-row .meta-tag { flex: 1; min-width: 0; }

.meta-tag-input {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 4px 8px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg);
  width: 100%;
}
textarea.meta-tag-input {
  resize: vertical;
  line-height: 1.5;
}
input[type="range"].meta-tag-input {
  border: none;
  padding: 0;
  background: transparent;
  box-shadow: none;
}
/* Auto-sizing textarea via grid overlay trick */
.meta-tag-grow {
  display: grid;
}
.meta-tag-grow::after,
.meta-tag-grow > textarea {
  grid-area: 1 / 1 / 2 / 2;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 4px 8px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
  width: 100%;
}
.meta-tag-grow::after {
  content: attr(data-value) " ";
  visibility: hidden;
  pointer-events: none;
}
.meta-tag-grow > textarea {
  resize: none;
  overflow: hidden;
  color: var(--color-text);
  background: var(--color-bg);
}
.meta-tag-grow > textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}
.meta-tag-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}
.meta-bar-buttons {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  margin-left: auto;
}

/* ---- Sections Toolbar ---- */
.sections-toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  align-items: center;
}

/* ---- Section Rows (compact) ---- */
.section-rows { display: flex; flex-direction: column; gap: 4px; }

.section-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.1s;
  user-select: none;
}
.section-row:hover { background: #f9fafb; }
.section-row.selected {
  border-color: var(--color-primary);
  background: #eef0f9;
}

.section-index {
  width: 26px; height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #f1f5f9;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.section-row.selected .section-index {
  background: var(--color-primary);
  color: #fff;
}

.section-title { flex: 1; font-weight: 600; font-size: 0.9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.section-badge {
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #fff;
  flex-shrink: 0;
  transition: background 0.3s;
}
.badge-pending { background: var(--color-badge-pending); }
.badge-splitting { background: var(--color-badge-active); animation: pulse 1.2s infinite; }
.badge-synthesizing { background: var(--color-badge-active); animation: pulse 1.2s infinite; }
.badge-complete { background: var(--color-badge-complete); }
.badge-failed { background: var(--color-badge-failed); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.row-spinner {
  width: 16px; height: 16px;
  border-width: 2px;
  border-top-color: var(--color-primary);
  flex-shrink: 0;
}

/* ---- Inspector (right) ---- */
.resize-handle {
  width: 4px;
  cursor: col-resize;
  background: var(--color-border);
  transition: background 0.15s;
}
.resize-handle:hover, .resize-handle.active {
  background: var(--color-primary);
}

.inspector {
  background: var(--color-surface);
  border-left: none;
  overflow-y: auto;
  padding: var(--space);
}

.inspector-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.inspector-index {
  width: 30px; height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.inspector-title {
  flex: 1;
  font-weight: 700;
  font-size: 1rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.inspector-group {
  margin-bottom: var(--space);
}

.inspector-heading {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.inspector-config {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ---- Section Text (inspector) ---- */
.section-text {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-text);
  white-space: pre-wrap;
  word-wrap: break-word;
  padding: 10px;
  background: #f8f9fb;
  border-radius: 6px;
  min-height: 150px;
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  width: 100%;
  resize: vertical;
}
.section-text:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}

/* ---- Prompt Display ---- */
.prompt-display {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre-wrap;
  padding: 10px;
  background: #f8f9fb;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  max-height: 300px;
  overflow-y: auto;
  color: var(--color-text);
}

.prompt-display.placeholder {
  color: var(--color-text-secondary);
  font-family: var(--font-sans);
  font-style: italic;
}

.insp-style-input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.85rem;
}
.insp-style-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}

.prompt-textarea-insp {
  width: 100%;
  min-height: 150px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  resize: vertical;
  tab-size: 2;
  color: var(--color-text);
  background: var(--color-surface);
}
.prompt-textarea-insp:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}

/* ---- Inspector Audio ---- */
.inspector-audio {
  width: 100%;
  height: 36px;
  margin-bottom: 8px;
}

.inspector-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

/* ---- Synth Progress (inspector) ---- */
.synth-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: #eef0f9;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}
.synth-progress .spinner {
  width: 16px; height: 16px;
  border-width: 2px;
  border-top-color: var(--color-primary);
}

/* ---- Text Muted ---- */
.text-muted { color: var(--color-text-secondary); font-size: 0.85rem; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
  color: #fff;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-accent { background: var(--color-accent); }
.btn-accent:hover:not(:disabled) { background: var(--color-accent-hover); }

.btn-danger { background: var(--color-danger); }
.btn-danger:hover:not(:disabled) { background: var(--color-danger-hover); }

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-secondary:hover:not(:disabled) { background: #eef0f9; }

.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--color-text-secondary);
  padding: 4px;
}
.btn-icon:hover { color: var(--color-text); }

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* ---- Accordion ---- */
.accordion-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 0;
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}
.accordion-toggle:hover { color: var(--color-primary); }

.accordion-toggle-sm {
  font-size: 0.82rem;
  padding: 8px 0;
}

.accordion-arrow {
  color: var(--color-text-secondary);
  transition: transform 0.2s;
  font-size: 0.75rem;
}
.accordion-toggle.open .accordion-arrow { transform: rotate(90deg); }

.accordion-body {
  padding-top: 4px;
}

/* ---- Instruction Prompt Overlay ---- */
.prompt-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}
.prompt-overlay[hidden] {
  display: none;
}
.prompt-overlay-inner {
  background: var(--color-bg);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  width: 90vw;
  height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.prompt-overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
}
.prompt-overlay-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}
.prompt-overlay-header .btn-icon {
  font-size: 1.4rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px 8px;
  border-radius: 6px;
}
.prompt-overlay-header .btn-icon:hover { background: #f1f5f9; color: var(--color-text); }

.prompt-overlay-tabs {
  display: flex;
  gap: 6px;
  padding: 12px 24px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--color-border);
}

.prompt-tab {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  font-family: var(--font-sans);
  transition: background 0.15s, border-color 0.15s;
}
.prompt-tab:hover { border-color: var(--color-primary); }
.prompt-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.prompt-overlay-editor {
  flex: 1;
  padding: 16px 24px;
  overflow: hidden;
  display: flex;
}
.prompt-overlay-textarea {
  width: 100%;
  height: 100%;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  resize: none;
  tab-size: 2;
}
.prompt-overlay-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}

.prompt-overlay-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 24px;
  border-top: 1px solid var(--color-border);
}
.prompt-overlay-actions {
  display: flex;
  gap: 8px;
}

/* ---- Empty State ---- */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--space);
}

.empty-state[hidden] { display: none; }

.empty-state-sm {
  text-align: center;
  padding: var(--space) 0;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

/* ---- Toast ---- */
#toast-container {
  position: fixed;
  top: calc(var(--bar-height) + 8px);
  right: 16px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
}

.toast {
  padding: 10px 16px;
  border-radius: var(--radius);
  color: #fff;
  font-weight: 500;
  font-size: 0.85rem;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-in 0.25s ease-out;
  max-width: 340px;
}
.toast-success { background: var(--color-accent); }
.toast-error { background: var(--color-danger); }
.toast-info { background: var(--color-primary); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ---- Spinner ---- */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
.spinner-white {
  border-color: rgba(255,255,255,0.3);
  border-top-color: #fff;
}

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

/* ---- Responsive: below 1100px ---- */
@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 0px var(--file-panel-width) 1fr 0px;
  }
  .layout .sidebar { border-right: none; }
  .layout .inspector { border-left: none; }

  /* Show sidebar as overlay */
  .layout.show-sidebar .sidebar {
    position: fixed;
    top: var(--bar-height); left: 0; bottom: 0;
    width: var(--sidebar-width);
    z-index: 50;
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

  /* Show inspector as bottom sheet */
  .layout.show-inspector .inspector {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    height: 50vh;
    z-index: 50;
    border-top: 1px solid var(--color-border);
    border-left: none;
    box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
  }
}

/* ---- Responsive: below 700px ---- */
@media (max-width: 700px) {
  .layout {
    grid-template-columns: 0px 0px 1fr 0px;
  }
  .file-panel { border-right: none; }

  /* Show file panel as overlay */
  .layout.show-file-panel .file-panel {
    position: fixed;
    top: var(--bar-height); left: 0; bottom: 0;
    width: var(--file-panel-width);
    z-index: 50;
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }
}

/* ---- Auth Screen (Landing Page) ---- */
.auth-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: #f0f1f8;
  display: flex;
  align-items: center;
  justify-content: center;
}
.auth-screen[hidden] { display: none; }

.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px 36px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.auth-logo {
  width: 80px;
  height: 80px;
  border-radius: 16px;
  margin-bottom: 16px;
}
.auth-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: #121265;
  margin-bottom: 6px;
}

.auth-subtitle {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.auth-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.auth-buttons[hidden] { display: none; }

.auth-btn {
  width: 100%;
  padding: 10px 16px;
  font-size: 0.95rem;
}

.auth-resume-row {
  display: flex;
  gap: 8px;
}

.auth-input {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-align: center;
  width: 100%;
}
.auth-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30,58,138,0.15);
}

.auth-token-modal {
  text-align: center;
}

.auth-token-msg {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.auth-token-display {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-bottom: 4px;
}
.auth-token-display code {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  word-break: break-all;
  text-align: left;
}

.auth-cognito-btn {
  background: #121265;
}
.auth-cognito-btn:hover:not(:disabled) {
  background: #0d0d50;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0;
  color: var(--color-text-secondary);
  font-size: 0.82rem;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.auth-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.auth-loading[hidden] { display: none; }

.auth-error {
  margin-top: 12px;
  color: var(--color-danger);
  font-size: 0.85rem;
  font-weight: 500;
}
.auth-error[hidden] { display: none; }

/* ---- Session Cost Button (top bar) ---- */
.session-cost-btn {
  color: rgba(255,255,255,0.7);
}
.session-cost-btn:hover {
  color: #fff;
}

/* ---- Token & Cost Badges (file list) ---- */
.token-badge {
  font-size: 0.65rem;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  white-space: nowrap;
  margin-right: 2px;
}
.cost-badge {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  cursor: pointer;
  white-space: nowrap;
  padding: 1px 4px;
  border-radius: 3px;
  transition: background 0.15s, color 0.15s;
}
.cost-badge:hover {
  background: #eef0f9;
  color: var(--color-primary);
}

/* ---- Cost Overlay/Popup ---- */
.cost-overlay[hidden] { display: none; }
.cost-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.45);
}
.cost-card {
  background: var(--color-surface);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
  padding: 0;
  width: 480px;
  max-width: 90vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.cost-card-wide {
  width: 600px;
}
.cost-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}
.cost-header h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}
.cost-body {
  padding: 16px 20px;
  overflow-y: auto;
}
.cost-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #f1f5f9;
  border-radius: 6px;
  margin-bottom: 14px;
  font-size: 0.88rem;
  font-weight: 500;
}
.cost-summary-amount {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
}

/* ---- Cost Table ---- */
.cost-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
.cost-table th {
  text-align: left;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  padding: 6px 10px;
  border-bottom: 2px solid var(--color-border);
}
.cost-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.cost-table tbody tr:hover {
  background: #f9fafb;
}
.cost-total-row td {
  font-weight: 700;
  border-top: 2px solid var(--color-border);
  border-bottom: none;
  padding-top: 10px;
}
.cost-disclaimer {
  margin: 12px 0 0;
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  font-style: italic;
  text-align: center;
}
.cost-pricing-section {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}
.cost-pricing-btn {
  width: 100%;
}
.pricing-input {
  width: 80px;
  padding: 2px 4px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  background: var(--color-bg);
  color: var(--color-text);
}
.pricing-input:focus {
  outline: none;
  border-color: var(--color-primary);
}
.btn-pricing-delete {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 1rem;
  padding: 0 4px;
  line-height: 1;
}
.btn-pricing-delete:hover {
  color: var(--color-danger);
}
.pricing-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 8px;
}
.pricing-add-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.pricing-model-input {
  width: 180px;
  padding: 4px 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  background: var(--color-bg);
  color: var(--color-text);
}
.pricing-model-input:focus {
  outline: none;
  border-color: var(--color-primary);
}