:root {
  --corp-bg: #f5f8fc;
  --corp-surface: #ffffff;
  --corp-surface-soft: #f1f5fb;
  --corp-border: #d6e0ef;
  --corp-border-strong: #b8c8e0;
  --corp-text: #12223f;
  --corp-text-soft: #5f7398;
  --corp-primary: #1e3a8a;
  --corp-primary-strong: #172f70;
  --corp-accent: #0f766e;
  --corp-accent-2: #2563eb;
  --corp-danger: #c81e4a;
  --corp-shadow: 0 8px 18px rgba(15, 34, 63, 0.08);
  --corp-radius: 12px;
}

html.dark {
  --corp-bg: #0b1427;
  --corp-surface: #111d36;
  --corp-surface-soft: #172744;
  --corp-border: #2a3f66;
  --corp-border-strong: #3a558a;
  --corp-text: #e8efff;
  --corp-text-soft: #a7b9dc;
  --corp-primary: #8ab0ff;
  --corp-primary-strong: #adc8ff;
  --corp-accent: #34bfae;
  --corp-accent-2: #7cb4ff;
  --corp-danger: #fb7185;
  --corp-shadow: 0 10px 22px rgba(4, 12, 32, 0.32);
}

body {
  background: var(--corp-bg);
  color: var(--corp-text);
  line-height: 1.65;
}

.container {
  max-width: 1200px;
  padding: 72px 36px 104px;
}

.page-header {
  margin-bottom: 36px;
}

.page-header h1,
.hero-title,
h1,
h2,
h3 {
  color: var(--corp-text);
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.subtitle,
.page-header .subtitle,
.card-label,
.muted-meta,
.setting-description,
.gallery-meta,
.form-group label,
label {
  color: var(--corp-text-soft);
}

.hero,
.quick-start-card,
.feature-card,
.insight-card,
.cta-section,
.toolbar,
.controls,
.controls-panel,
.css-output,
.empty-state,
.profile-card,
.settings-card,
.result-card,
.color-card,
.card,
.preview-section,
.info-section,
.info-table,
.jump-panel,
.extract-help,
.css-code,
.palette,
.harmony-result,
.history-list,
.history-empty {
  background: var(--corp-surface);
  border: 1px solid var(--corp-border);
  border-radius: var(--corp-radius);
  box-shadow: var(--corp-shadow);
}

.hero,
.cta-section {
  background: linear-gradient(180deg, var(--corp-surface) 0%, var(--corp-surface-soft) 100%);
  border-color: var(--corp-border-strong);
}

html.dark .hero,
html.dark .cta-section {
  background: linear-gradient(180deg, var(--corp-surface) 0%, var(--corp-surface-soft) 100%);
}

.hero,
.quick-start-card,
.feature-card,
.insight-card,
.cta-section,
.controls-panel,
.css-output,
.empty-state,
.profile-card,
.settings-card,
.result-card,
.color-card,
.card,
.preview-section,
.info-section,
.info-table,
.jump-panel,
.extract-help,
.palette,
.harmony-result {
  padding: 24px;
}

.feature-card,
.insight-card,
.quick-start-card,
.result-card,
.color-card,
.settings-card,
.profile-card,
.card {
  position: relative;
  overflow: hidden;
}

.feature-card::before,
.insight-card::before,
.quick-start-card::before,
.result-card::before,
.color-card::before,
.settings-card::before,
.profile-card::before,
.card::before {
  content: none;
}

.card,
.settings-card,
.profile-card,
.result-card,
.color-card,
.feature-card,
.insight-card {
  overflow: hidden;
}

.card-header,
.settings-card-header,
.gallery-item-header,
.profile-header,
.css-output-header {
  border-bottom: 1px solid var(--corp-border);
  background: var(--corp-surface-soft);
  padding: 14px 18px;
}

button,
.btn,
.toolbar-btn,
.type-tab,
.harmony-tab,
.filter-tab,
.category-btn,
.copy-css-btn,
.add-stop-btn,
.action-btn,
.quick-start-link,
.upload-btn,
.gallery-name-button {
  border-radius: 10px;
  border: 1px solid var(--corp-border-strong);
  background: var(--corp-surface);
  color: var(--corp-primary);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
  min-height: 40px;
  padding: 9px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
  text-transform: none;
}

button:hover,
.btn:hover,
.toolbar-btn:hover,
.type-tab:hover,
.harmony-tab:hover,
.filter-tab:hover,
.category-btn:hover,
.copy-css-btn:hover,
.add-stop-btn:hover,
.action-btn:hover,
.quick-start-link:hover,
.upload-btn:hover,
.gallery-name-button:hover {
  border-color: var(--corp-accent-2);
  color: var(--corp-primary-strong);
  background: color-mix(in srgb, var(--corp-surface) 90%, var(--corp-accent-2) 10%);
  box-shadow: 0 2px 8px rgba(15, 34, 63, 0.1);
  letter-spacing: 0;
}

button:focus-visible,
.btn:focus-visible,
.toolbar-btn:focus-visible,
.type-tab:focus-visible,
.harmony-tab:focus-visible,
.filter-tab:focus-visible,
.category-btn:focus-visible,
.copy-css-btn:focus-visible,
.add-stop-btn:focus-visible,
.action-btn:focus-visible,
.upload-btn:focus-visible,
.gallery-name-button:focus-visible,
.favorite-btn:focus-visible,
.toggle-switch-btn:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--corp-accent-2) 70%, #ffffff 30%);
  outline-offset: 2px;
}

button:disabled,
.btn:disabled,
.toolbar-btn:disabled,
.type-tab:disabled,
.harmony-tab:disabled,
.filter-tab:disabled,
.category-btn:disabled,
.copy-css-btn:disabled,
.add-stop-btn:disabled,
.action-btn:disabled,
.upload-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.toggle-switch,
.toggle-switch-btn {
  min-height: 24px;
  width: 44px;
  height: 24px;
  padding: 0;
  border: none;
  border-radius: 999px;
}

.favorite-btn {
  min-height: 0;
  width: 30px;
  height: 30px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: transparent;
  box-shadow: none;
}

.favorite-btn:hover {
  background: color-mix(in srgb, var(--corp-surface-soft) 70%, transparent);
}

.btn-primary,
.type-tab.active,
.harmony-tab.active,
.filter-tab.active,
.category-btn.active,
button.active {
  background: var(--corp-primary);
  color: #ffffff;
  border-color: var(--corp-primary);
}

.btn-secondary,
.btn-success,
.copy-css-btn,
.toolbar-btn,
.add-stop-btn {
  background: var(--corp-surface-soft);
}

.btn,
.toolbar-btn,
.copy-css-btn,
.add-stop-btn,
.type-tab,
.harmony-tab,
.filter-tab,
.category-btn,
.action-btn,
.quick-start-link,
.upload-btn {
  min-height: 40px;
  padding: 9px 14px;
}

.btn-danger,
.danger-zone .btn,
.danger-zone button {
  background: color-mix(in srgb, var(--corp-surface) 92%, var(--corp-danger) 8%);
  color: color-mix(in srgb, var(--corp-danger) 86%, var(--corp-primary-strong) 14%);
  border-color: color-mix(in srgb, var(--corp-danger) 45%, var(--corp-border-strong) 55%);
}

input,
select,
textarea,
.form-input,
.form-textarea,
.form-select,
.search-input,
.workspace-select,
.output-select {
  background: var(--corp-surface);
  border: 1px solid var(--corp-border-strong);
  color: var(--corp-text);
  border-radius: 10px;
  min-height: 40px;
  padding: 9px 12px;
}

input,
select,
textarea,
.form-input,
.form-textarea,
.form-select,
.search-input,
.workspace-select {
  min-height: 40px;
  padding: 9px 12px;
}

input:focus,
select:focus,
textarea:focus,
.form-input:focus,
.form-textarea:focus,
.form-select:focus,
.search-input:focus {
  outline: none;
  border-color: var(--corp-accent-2);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--corp-accent-2) 20%, transparent);
}

.angle-slider,
input[type="range"] {
  background: color-mix(in srgb, var(--corp-primary) 20%, #c8d4ef 80%);
}

.angle-slider::-webkit-slider-thumb,
input[type="range"]::-webkit-slider-thumb {
  background: var(--corp-primary);
  border: 2px solid #ffffff;
}

.history-nav,
.filter-tabs,
.category-buttons,
.type-tabs,
.harmony-tabs,
.toolbar-actions,
.controls,
.actions,
.actions-row {
  gap: 12px;
}

.gallery-item,
.emoji-grid > div,
.palette > div,
.preview-box,
.stat-box,
.setting-item {
  border: 1px solid var(--corp-border);
  border-radius: 10px;
  background: var(--corp-surface);
  padding: 14px;
}

.toolbar,
.controls,
.controls-panel,
.css-output,
.card,
.settings-card,
.profile-card,
.result-card,
.color-card,
.empty-state {
  box-shadow: 0 8px 18px rgba(15, 34, 63, 0.08);
}

.page-header h1,
.hero-title {
  font-weight: 800;
}

.subtitle,
.page-header .subtitle {
  max-width: 68ch;
}

.feature-badge,
.badge-status,
.wcag-badge,
.muted-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--corp-border-strong);
  background: var(--corp-surface-soft);
  color: var(--corp-primary-strong);
  font-weight: 600;
}

.info-table th,
.info-table td,
table th,
table td {
  border-bottom: 1px solid var(--corp-border);
}

.info-table th,
table th {
  color: var(--corp-primary-strong);
  background: var(--corp-surface-soft);
  font-weight: 700;
}

.history-nav,
.toolbar,
.controls,
.controls-panel {
  border-color: var(--corp-border-strong);
}

.toast {
  background: var(--corp-primary-strong);
  color: #ffffff;
  border: 1px solid color-mix(in srgb, var(--corp-primary-strong) 70%, #ffffff 30%);
  box-shadow: var(--corp-shadow);
}

a {
  color: var(--corp-accent-2);
}

a:hover {
  color: var(--corp-primary);
}

@media (max-width: 768px) {
  .container {
    padding: 32px 16px 64px;
  }

  .hero,
  .card,
  .settings-card,
  .profile-card,
  .controls,
  .controls-panel,
  .toolbar {
    border-radius: 10px;
  }

  .hero,
  .quick-start-card,
  .feature-card,
  .insight-card,
  .cta-section,
  .controls-panel,
  .css-output,
  .empty-state,
  .profile-card,
  .settings-card,
  .result-card,
  .color-card,
  .card,
  .preview-section,
  .info-section,
  .info-table,
  .jump-panel,
  .extract-help,
  .palette,
  .harmony-result {
    padding: 16px;
  }
}