:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #e8e8e8;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #6b6b6b;
  --accent: #c41e3a;
  --accent-hover: #a01830;
  --border: #d0d0d0;

.hidden { display: none; }
  --shadow: rgba(0, 0, 0, 0.1);
  --code-bg: #f0f0f0;
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #333333;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-muted: #888888;
  --accent: #ff6b6b;
  --accent-hover: #ff8585;
  --border: #404040;
  --shadow: rgba(0, 0, 0, 0.3);
  --code-bg: #2a2a2a;
}


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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.container { max-width: 980px; margin: 0 auto; padding: 0 20px; }

header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 15px 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.logo-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: block;
}

.icon-audio {
  color: var(--accent);
}

.logo-text {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

nav { display: flex; gap: 8px; flex-wrap: wrap; }
nav a {
  padding: 8px 16px;
  border-radius: 6px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  background: none;
  font-size: 16px;
  font-family: inherit;
}
nav a:hover { background-color: var(--bg-tertiary); color: var(--text-primary); text-decoration: none; }
nav a.active { background-color: var(--bg-tertiary); color: var(--text-primary); }

.theme-switcher {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  padding: 4px;
  border-radius: 8px;
  width: 38px;
  height: 38px;
  align-items: center;
  z-index: 100;
  position: absolute;
  right: 0;
  top: 4px;
  cursor: pointer;
  overflow: hidden;
}

.theme-switcher.expanded {
  height: auto;
  overflow: visible;
}

.theme-switcher .theme-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border: none;
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  font-size: 20px;
  line-height: 1;
  width: 30px;
  height: 30px;
  transition: opacity 0.2s ease;
  margin-bottom: 4px;
}

.theme-switcher .theme-btn:not(.active) {
  opacity: 0;
  pointer-events: none;
  position: absolute;
}

.theme-switcher.expanded .theme-btn:not(.active) {
  opacity: 1;
  pointer-events: auto;
  position: relative;
}

.theme-switcher .theme-btn.active {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  opacity: 1;
  pointer-events: auto;
}

.theme-switcher .theme-btn:hover {
  background-color: var(--border);
  color: var(--text-primary);
}

main { padding: 40px 0; }

.page { display: none; }
.page.active { display: block; }

.hero { text-align: center; padding: 40px 0; margin-bottom: 40px; }
.hero h1 { font-size: 36px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.hero p { font-size: 18px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; margin-bottom: 40px; }
.feature-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 4px 12px var(--shadow); }
.feature-card h3 { font-size: 20px; margin-bottom: 12px; color: var(--text-primary); }
.feature-card p { color: var(--text-secondary); font-size: 15px; }
.feature-card a { display: inline-block; margin-top: 12px; font-weight: 500; cursor: pointer; }

.content-section { background-color: var(--bg-secondary); border: 1px solid var(--border); border-radius: 12px; padding: 32px; margin-bottom: 24px; }
.content-section h2 { font-size: 24px; margin-bottom: 16px; color: var(--text-primary); }
.content-section p { color: var(--text-secondary); margin-bottom: 16px; }
.content-section ul { color: var(--text-secondary); padding-left: 24px; margin-bottom: 16px; }
.content-section li { margin-bottom: 8px; }

.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 32px; }
.cta-btn { display: inline-block; padding: 14px 28px; border-radius: 8px; font-weight: 600; font-size: 16px; transition: all 0.2s ease; cursor: pointer; border: none; }
.cta-btn-primary { background-color: var(--accent); color: white; }
.cta-btn-primary:hover { background-color: var(--accent-hover); color: white; text-decoration: none; }
.cta-btn-secondary { background-color: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.cta-btn-secondary:hover { background-color: var(--border); text-decoration: none; }

h1.page-title { font-size: 28px; margin-bottom: 24px; color: var(--text-primary); }

.search-form, .annotation-form { background-color: var(--bg-secondary); border: 1px solid var(--border); border-radius: 12px; padding: 24px; margin-bottom: 24px; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.form-group { flex: 1; min-width: 200px; }
.form-group.full-width { flex-basis: 100%; }
.form-group select#phs { flex: 0 0 auto; min-width: 0; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; color: var(--text-secondary); font-size: 14px; }
.form-group input[type="text"], .form-group textarea, .form-group select {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px;
  background-color: var(--bg-primary); color: var(--text-primary); font-size: 16px; transition: border-color 0.2s ease;
  font-family: inherit;
}
.form-group textarea { min-height: 200px; resize: vertical; }
.textarea-wrapper { position: relative; display: flex; align-items: flex-start; }
.textarea-wrapper textarea { flex: 1; }
.clear-btn {
  position: absolute; transform: translateY(-38%);
  background: none; border: none; cursor: pointer; opacity: 0.5; transition: opacity 0.2s;
  color: var(--text-muted); font-size: 26px;
}
.clear-btn:hover { opacity: 1; }
.input-wrapper { position: relative; display: flex; align-items: center; }
.input-wrapper input { flex: 1; padding-right: 48px; }
.input-wrapper .clear-btn { right: 10px; top: 50%; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--accent); }

.radio-group { display: flex; gap: 16px; flex-wrap: wrap; }
.radio-label, .checkbox-label { display: flex; align-items: center; gap: 6px; cursor: pointer; color: var(--text-secondary); font-size: 14px; }
.radio-label input, .checkbox-label input { accent-color: var(--accent); }

.options-row { display: flex; gap: 24px; flex-wrap: wrap; margin-bottom: 16px; }
.options-section h4 { font-size: 14px; font-weight: 500; color: var(--text-muted); margin-bottom: 8px; }

.submit-btn { padding: 12px 24px; background-color: var(--accent); color: white; border: none; border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer; transition: background-color 0.2s ease; }
.submit-btn:hover { background-color: var(--accent-hover); }
.clear-btn-text {
  padding: 12px 24px; background-color: var(--bg-tertiary); color: var(--text-primary); 
  border: 1px solid var(--border-color); border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer;
}
.clear-btn-text:hover { background-color: var(--bg-primary); }
.form-actions { display: flex; gap: 12px; margin-top: 8px; }

.results-info { margin-bottom: 16px; color: var(--text-muted); font-size: 14px; display: flex; align-items: center; gap: 12px; }
.dict-info { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 12px; }
.dict-info .results-info { margin-bottom: 0; }
.paging-btn { padding: 6px 12px; background-color: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border); border-radius: 4px; font-size: 13px; cursor: pointer; }
.paging-btn:hover:not(:disabled) { background-color: var(--bg-tertiary); }
.paging-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.dict-table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.dict-table th, .dict-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.dict-table th { background-color: var(--bg-tertiary); font-weight: 600; font-size: 14px; color: var(--text-secondary); }
.dict-table tr:last-child td { border-bottom: none; }
.dict-table tr:hover { background-color: var(--bg-secondary); }
.dict-table .word { color: var(--text-primary); }
.dict-table .pinyin { color: var(--text-muted); font-style: italic; vertical-align: middle; }
.dict-table .english { color: var(--text-secondary); }
.dict-table .freq { color: var(--text-muted); font-size: 13px; text-align: center; }
.dict-table .freq-circle { width: 20px; height: 20px; border-radius: 50%; display: inline-block; }
.dict-paging { display: flex; gap: 12px; }
.dict-paging-bottom { display: flex; justify-content: flex-end; gap: 12px; margin-top: 16px; }
.word-link { color: var(--accent); cursor: pointer; }
.word-link:hover { text-decoration: underline; }

.results-section { background-color: var(--bg-secondary); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.results-header { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.results-header h2 { font-size: 20px; color: var(--text-primary); margin-bottom: 4px; }
.results-header p { color: var(--text-muted); font-size: 14px; }

.toggle-phonetics-btn {
  padding: 8px 16px; background-color: var(--bg-secondary); color: var(--text-primary); 
  border: 1px solid var(--border); border-radius: 6px; font-size: 14px; font-weight: 500; cursor: pointer;
}
.toggle-phonetics-btn:hover { background-color: var(--bg-tertiary); }
.annotation-output { line-height: 2.2; font-size: 18px; }
.word-annotation { display: inline; }
.pinyin { color: var(--accent); vertical-align: super; margin-right: 2px; }
.dict-table .pinyin sup { vertical-align: super; color: var(--text-muted); }
.chinese-char { position: relative; cursor: help; }
.tooltip { display: none; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%); background-color: var(--bg-tertiary); border: 1px solid var(--border); border-radius: 8px; padding: 12px; min-width: 200px; z-index: 100; box-shadow: 0 4px 12px var(--shadow); text-align: left; }
.chinese-char:hover .tooltip { display: block; }
.tooltip .tp-pinyin { color: var(--accent); font-weight: 600; margin-bottom: 4px; }
.tooltip .tp-word { color: var(--text-primary); font-size: 18px; margin-bottom: 4px; }
.tooltip .tp-def { color: var(--text-secondary); font-size: 14px; }

code {
  background-color: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "Monaco", "Menlo", "Consolas", monospace;
  font-size: 0.9em;
  color: var(--accent);
}

.code-block {
  background-color: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 12px 0;
  overflow-x: auto;
  font-family: "Monaco", "Menlo", "Consolas", monospace;
  font-size: 14px;
  color: var(--text-primary);
}

.bookmark-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 16px 0;
}

.bookmark-link {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--accent);
  color: white;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}

.bookmark-link:hover {
  background-color: var(--accent-hover);
  text-decoration: none;
  color: white;
}

.form-group textarea[readonly] {
  cursor: text;
  min-height: 80px;
  font-family: "Monaco", "Menlo", "Consolas", monospace;
  font-size: 12px;
}

footer { background-color: var(--bg-secondary); border-top: 1px solid var(--border); padding: 24px 0; margin-top: 40px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 14px; cursor: pointer; }
.footer-links a:hover { color: var(--accent); }
.copyright { color: var(--text-muted); font-size: 14px; }

.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  z-index: 1000;
  display: none;
}

.cookie-consent.show {
  display: flex;
}

.cookie-consent p {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0;
}

.cookie-consent a {
  color: var(--accent);
}

.cookie-buttons {
  display: flex;
  gap: 12px;
}

.cookie-buttons button {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cookie-buttons #cookie-accept {
  background-color: var(--accent);
  color: white;
  border: none;
}

.cookie-buttons #cookie-accept:hover {
  background-color: var(--accent-hover);
}

.cookie-buttons #cookie-decline {
  background-color: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.cookie-buttons #cookie-decline:hover {
  background-color: var(--bg-tertiary);
}

@media (max-width: 768px) {
  .dict-table th:nth-child(5), .dict-table td:nth-child(5) { display: none; }
}

@media (max-width: 600px) {
  .header-content { flex-direction: column; text-align: center; }
  nav { justify-content: center; }
  .form-row { flex-direction: column; }
  .options-row { flex-direction: column; gap: 16px; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 16px; }
  .footer-content { flex-direction: column; text-align: center; }
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1001;
  align-items: center;
  justify-content: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  max-width: 500px;
  position: relative;
  box-shadow: 0 4px 20px var(--shadow);
}

.modal-content h2 {
  margin-bottom: 16px;
  color: var(--text-primary);
}

.modal-content p {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-close:hover {
  color: var(--text-primary);
}

@media print {
  nav, .search-form, .annotation-form, .form-actions, .toggle-phonetics-btn, 
  .submit-btn, .clear-btn-text, .paging-btn, #cookie-consent, #cookie-modal,
  .theme-switcher, .footer-links, #page-annotate h1.page-title, .results-header,
  .hidden { display: none !important; }
  
  body { background: white; color: black; }
  .page { display: none !important; }
  .page.active { display: block !important; }
  .page.active h1.page-title { display: block !important; }
  .dict-table { page-break-inside: avoid; }
  .dict-table td, .dict-table th { border: 1px solid #ccc; }
  .mandarinspot-entry-block { page-break-inside: avoid; }
}