/*
 * 橙光队无障碍督导标准查询 - 样式表
 * Copyright © 2025 Wayhhow
 * Licensed under MIT
 * https://github.com/Wayhhow/accessibility-standards
 */

/* ============================================
   Accessibility Standards Query Tool
   CSS Styles - Orange & White Theme
   ============================================ */

/* --- CSS Variables --- */
:root {
  --primary: #E8740C;
  --primary-light: #FFF3E8;
  --primary-dark: #C45E00;
  --bg: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --text: #333333;
  --text-secondary: #666666;
  --border: #E0E0E0;
  --danger: #DC3545;
  --info: #2563EB;
  --warning: #F59E0B;
  --success: #16A34A;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --transition: 0.2s ease;
  --max-width: 1200px;
  --header-height: auto;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg-secondary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* --- Screen Reader Only --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 8px;
  outline: 3px solid var(--primary-dark);
  outline-offset: 2px;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Header --- */
.site-header {
  background: var(--bg);
  border-bottom: 3px solid var(--primary);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 20px;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 4px;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

/* --- Search Box --- */
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 560px;
  min-width: 240px;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232, 116, 12, 0.15);
}

.search-input::placeholder {
  color: #aaa;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
  line-height: 1.2;
}

.btn:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-outline {
  background: var(--bg);
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  min-height: 36px;
}

.btn-pdf {
  background: var(--primary-light);
  color: var(--primary);
  border-color: transparent;
  padding: 4px 10px;
  font-size: 0.78rem;
  min-height: 32px;
  border-radius: var(--radius-sm);
}

.btn-pdf:hover {
  background: var(--primary);
  color: #fff;
}

/* --- Search Results --- */
.search-results-section {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.search-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.search-results-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.search-results {
  max-height: 60vh;
  overflow-y: auto;
}

.search-result-item {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--bg);
  transition: box-shadow var(--transition);
}

.search-result-item:hover {
  box-shadow: var(--shadow-md);
}

.search-result-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.search-result-number {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--primary-dark);
}

.search-result-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 12px;
  white-space: nowrap;
  line-height: 1.5;
}

.badge-mandatory {
  background: #FEE2E2;
  color: var(--danger);
}

.badge-type-full {
  background: #FEE2E2;
  color: var(--danger);
}

.badge-type-partial {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.badge-type-local {
  background: #DBEAFE;
  color: var(--info);
}

.search-result-path {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.search-result-text {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.7;
}

.search-result-text mark {
  background: #FBBF24;
  color: var(--text);
  padding: 1px 3px;
  border-radius: 2px;
  font-weight: 600;
}

.search-result-actions {
  margin-top: 10px;
  display: flex;
  justify-content: flex-end;
}

.search-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.search-empty svg {
  margin-bottom: 12px;
  color: var(--border);
}

.search-empty p {
  margin-bottom: 8px;
}

.search-suggestions {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  text-align: left;
}

.search-suggestions h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.search-suggestions ul {
  list-style: none;
  padding: 0;
}

.search-suggestions li {
  padding: 4px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.search-suggestions li::before {
  content: "- ";
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  padding: 24px 0;
}

/* --- Section Titles --- */
.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}

.section-title svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* --- Common Issues --- */
.common-issues-section {
  margin-bottom: 32px;
}

.issue-categories {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.issue-categories::-webkit-scrollbar {
  display: none;
}

.category-tab {
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 2px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;
  flex-shrink: 0;
}

.category-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

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

.category-tab:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.common-issues-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.issue-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.issue-card:hover {
  box-shadow: var(--shadow-md);
}

.issue-card-header {
  padding: 16px;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: background var(--transition);
  min-height: 44px;
}

.issue-card-header:hover {
  background: var(--bg-secondary);
}

.issue-card-header:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: -3px;
}

.issue-card-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  color: var(--primary);
}

.issue-card-icon svg {
  width: 20px;
  height: 20px;
}

.issue-card-info {
  flex: 1;
  min-width: 0;
}

.issue-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.issue-card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.issue-card-toggle {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: transform var(--transition);
  margin-top: 2px;
}

.issue-card-toggle.open {
  transform: rotate(180deg);
}

.issue-card-body {
  display: none;
  padding: 0 16px 16px;
  border-top: 1px solid var(--border);
}

.issue-card-body.open {
  display: block;
}

.issue-check-points {
  margin-top: 12px;
}

.issue-check-points h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.issue-check-points ul {
  list-style: none;
  padding: 0;
}

.issue-check-points li {
  position: relative;
  padding: 4px 0 4px 24px;
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.6;
}

.issue-check-points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--primary);
  border-radius: 50%;
}

.issue-related-clauses {
  margin-top: 16px;
}

.issue-related-clauses h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.related-clause-item {
  padding: 10px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  border-left: 3px solid var(--primary);
}

.related-clause-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.related-clause-number {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--primary-dark);
}

.related-clause-standard {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.related-clause-text {
  font-size: 0.83rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 6px;
}

.related-clause-actions {
  display: flex;
  justify-content: flex-end;
}

/* --- Standard Tabs --- */
.standard-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.standard-tabs::-webkit-scrollbar {
  display: none;
}

.standard-tab {
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;
  flex-shrink: 0;
}

.standard-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

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

.standard-tab:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* --- Outline Tree --- */
.outline-tree {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.outline-chapter {
  border-bottom: 1px solid var(--border);
}

.outline-chapter:last-child {
  border-bottom: none;
}

.outline-chapter-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  background: var(--bg-secondary);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  transition: background var(--transition);
  min-height: 44px;
  width: 100%;
  border: none;
  text-align: left;
  font-family: inherit;
  line-height: 1.4;
}

.outline-chapter-header:hover {
  background: #F0F1F3;
}

.outline-chapter-header:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: -3px;
}

.outline-chapter-header.open {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-bottom: 2px solid var(--primary);
}

.outline-toggle {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
  color: var(--text-secondary);
}

.outline-toggle.open {
  transform: rotate(90deg);
  color: var(--primary);
}

.outline-chapter-number {
  flex-shrink: 0;
  font-weight: 700;
  color: var(--primary);
  min-width: 24px;
}

.outline-chapter-header.open .outline-chapter-number {
  color: var(--primary-dark);
}

.outline-chapter-title {
  flex: 1;
}

.outline-chapter-body {
  display: none;
}

.outline-chapter-body.open {
  display: block;
}

/* Section level */
.outline-section {
  border-bottom: 1px solid var(--border);
}

.outline-section:last-child {
  border-bottom: none;
}

.outline-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px 12px 40px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  transition: background var(--transition);
  min-height: 44px;
  width: 100%;
  border: none;
  text-align: left;
  font-family: inherit;
  background: var(--bg);
  line-height: 1.4;
}

.outline-section-header:hover {
  background: var(--bg-secondary);
}

.outline-section-header:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: -3px;
}

.outline-section-header.open {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.outline-section-number {
  flex-shrink: 0;
  font-weight: 700;
  color: var(--primary);
  min-width: 32px;
}

.outline-section-body {
  display: none;
}

.outline-section-body.open {
  display: block;
}

/* Clause level */
.outline-clause {
  padding: 12px 16px 12px 72px;
  border-bottom: 1px solid #F0F0F0;
  transition: background var(--transition);
}

.outline-clause:last-child {
  border-bottom: none;
}

.outline-clause:hover {
  background: var(--bg-secondary);
}

.outline-clause-header {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 6px;
}

.outline-clause-number {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--primary-dark);
  flex-shrink: 0;
  min-width: 40px;
}

.outline-clause-badges {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.outline-clause-text {
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 8px;
}

.outline-clause-actions {
  display: flex;
  justify-content: flex-end;
}

/* Direct clause (no section parent) */
.outline-direct-clause {
  padding: 12px 16px 12px 40px;
  border-bottom: 1px solid #F0F0F0;
  transition: background var(--transition);
}

.outline-direct-clause:last-child {
  border-bottom: none;
}

.outline-direct-clause:hover {
  background: var(--bg-secondary);
}

/* --- Footer --- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: auto;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-desc {
  margin: 0;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary);
}

/* --- Loading --- */
.loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.loading-spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .logo {
    justify-content: center;
  }

  .site-title {
    font-size: 1.1rem;
  }

  .search-box {
    max-width: 100%;
    width: 100%;
  }

  .issue-categories {
    flex-wrap: wrap;
    gap: 6px;
  }

  .category-tab {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .common-issues-list {
    grid-template-columns: 1fr;
  }

  .standard-tabs {
    flex-wrap: wrap;
    gap: 6px;
  }

  .standard-tab {
    padding: 6px 14px;
    font-size: 0.8rem;
  }

  .outline-chapter-header {
    padding: 12px 14px;
    font-size: 0.9rem;
  }

  .outline-section-header {
    padding: 10px 14px 10px 32px;
    font-size: 0.85rem;
  }

  .outline-clause {
    padding: 10px 14px 10px 56px;
  }

  .outline-direct-clause {
    padding: 10px 14px 10px 32px;
  }

  .search-result-item {
    padding: 12px;
  }

  .search-results {
    max-height: 50vh;
  }

  .section-title {
    font-size: 1.05rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }

  .site-title {
    font-size: 1rem;
  }

  .search-input {
    font-size: 0.88rem;
    padding: 8px 12px 8px 36px;
  }

  .btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }

  .outline-clause {
    padding: 8px 12px 8px 48px;
  }

  .outline-direct-clause {
    padding: 8px 12px 8px 24px;
  }
}

/* --- Focus visible global --- */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* --- Print --- */
@media print {
  .site-header,
  .search-box,
  .issue-categories,
  .standard-tabs,
  .site-footer,
  .btn-pdf,
  .skip-link {
    display: none !important;
  }

  .main-content {
    padding: 0;
  }

  .outline-tree {
    border: none;
  }

  .outline-chapter-body,
  .outline-section-body,
  .issue-card-body {
    display: block !important;
  }
}