:root {
  --bg-page: #f5f3ef;
  --bg-card: #ffffff;
  --border-subtle: #e5e0d8;
  --text-main: #1f2421;
  --text-muted: #646a66;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --magic: #7c3aed;
  --magic-hover: #6d28d9;
  --accent-warm: #f59e0b;
  --danger: #dc2626;
  --radius-lg: 14px;
  --radius-md: 10px;
  --shadow-sm: 0 2px 10px rgba(31, 36, 33, 0.05);
}

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

body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

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

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  border: 1px solid #f59e0b44;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.brand h1 {
  font-size: 19px;
  font-weight: 700;
  color: #111827;
}

.brand p {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.template-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.template-label {
  font-size: 13px;
  font-weight: 600;
  color: #4b5563;
}

.chip-btn {
  border: 1px solid #d1d5db;
  background: #f9fafb;
  color: #374151;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #eff6ff;
}

.chip-btn.active {
  background: #1e40af;
  color: #ffffff;
  border-color: #1e40af;
  font-weight: 500;
}

/* Main Workspace */
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
  padding: 18px 24px;
  max-width: 1640px;
  width: 100%;
  margin: 0 auto;
}

@media (max-width: 1120px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}

.flex-grow-card {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.card-header.compact {
  margin-bottom: 12px;
}

.step-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.step-badge {
  background: #dbeafe;
  color: #1e40af;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 6px;
}

.step-title h2 {
  font-size: 15.5px;
  font-weight: 700;
  color: #111827;
}

.helper-text {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.5;
}

/* Forms & Inputs */
textarea,
input[type="text"],
select {
  width: 100%;
  border: 1px solid #d6d3cd;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 13.5px;
  font-family: inherit;
  color: #111827;
  background: #fdfcfb;
  transition: border-color 0.15s, box-shadow 0.15s;
}

textarea:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

textarea {
  resize: vertical;
  line-height: 1.55;
}

.slide-editor-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-row.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: #374151;
}

.label-with-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px;
}

.markup-toolbar {
  display: flex;
  gap: 6px;
}

.mark-btn {
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.1s;
}

.mark-btn:hover {
  transform: translateY(-1px);
}

.mark-highlight {
  background: #fef08a;
  color: #854d0e;
  border-color: #facc15;
}

.mark-wave {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
}

.mark-circle {
  background: #ffedd5;
  color: #9a3412;
  border-color: #fdba74;
}

/* Slide Tabs */
.slide-tabs-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.slide-tabs {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.slide-tab {
  border: 1px solid #d1d5db;
  background: #f9fafb;
  color: #374151;
  padding: 4px 11px;
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.slide-tab.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Settings Grid */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 680px) {
  .settings-grid,
  .form-row.two-col {
    grid-template-columns: 1fr;
  }
}

.setting-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.setting-item label {
  font-size: 12.5px;
  font-weight: 600;
  color: #374151;
}

.theme-pills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.theme-pill {
  border: 1px solid #d6d3cd;
  background: #faf9f6;
  padding: 6px 8px;
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.theme-pill.active {
  background: #fef3c7;
  border-color: #f59e0b;
  color: #92400e;
  font-weight: 700;
}

.inline-selects {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

/* Stage & Canvas */
.stage-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stage-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

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

.page-pill {
  background: #f3f4f6;
  color: #1f2937;
  font-size: 12.5px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12.5px;
  color: #4b5563;
  cursor: pointer;
}

.canvas-viewport {
  position: relative;
  background: #18181b;
  border-radius: 12px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 440px;
  max-height: 540px;
  overflow: hidden;
}

#boardCanvas {
  max-width: 100%;
  max-height: 516px;
  width: auto;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

/* Overlay */
.status-overlay {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.82);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #ffffff;
  padding: 24px;
  text-align: center;
  z-index: 10;
}

.status-overlay.hidden {
  display: none;
}

.spinner {
  width: 38px;
  height: 38px;
  border: 3.5px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fbbf24;
  border-radius: 50%;
  animation: spin 0.85s linear infinite;
}

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

.status-title {
  font-size: 15px;
  font-weight: 700;
}

.status-sub {
  font-size: 12.5px;
  color: #d1d5db;
}

.progress-bar-track {
  width: 240px;
  height: 8px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 4px;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #f59e0b, #10b981);
  transition: width 0.25s ease;
}

/* Buttons & Action Bar */
.action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 9px 15px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12.5px;
}

.btn-xs {
  padding: 4px 9px;
  font-size: 12px;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  flex: 1;
  min-width: 190px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-1px);
}

.btn-magic {
  background: linear-gradient(135deg, #7c3aed, #db2777);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(124, 58, 237, 0.25);
}

.btn-magic:hover:not(:disabled) {
  opacity: 0.94;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

.btn-secondary:hover:not(:disabled) {
  background: #dbeafe;
}

.btn-outline {
  background: #ffffff;
  color: #374151;
  border: 1px solid #d1d5db;
}

.btn-outline:hover:not(:disabled) {
  background: #f3f4f6;
}

.btn-danger-outline {
  background: #fff5f5;
  color: var(--danger);
  border: 1px solid #fecaca;
}

.btn-danger-outline:hover:not(:disabled) {
  background: #fee2e2;
}

.hidden {
  display: none !important;
}