/* ============================================
   Your Chinese Name — Style
   Clean, modern design with Chinese aesthetic accents
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;900&display=swap');

:root {
  --vermillion: #C43A31;
  --ink: #1A1A1A;
  --paper: #F5F0E8;
  --paper-dark: #EBE5DA;
  --gold: #B8860B;
  --gold-light: #D4A843;
  --indigo: #2C3E50;
  --stone: #8B7D6B;
  --stone-light: #C4B5A5;
  --jade: #5B8C5A;
  --jade-light: #E8F0E4;
  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-serif: 'Noto Serif SC', 'SimSun', 'STSong', serif;
  --font-kai: 'KaiTi', 'STKaiti', 'Noto Serif SC', serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius: 8px;
  --transition: 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  min-height: 100vh;
}

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; line-height: 1.35; }
h1 { font-size: 2.75rem; letter-spacing: 0.02em; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a { color: var(--vermillion); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--gold); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }

/* --- Nav --- */
.nav {
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--paper-dark);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(10px);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: 1100px; margin: 0 auto;
}
.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.3rem; color: var(--vermillion); font-weight: 700;
  display: flex; align-items: center; gap: 8px;
}
.nav-logo .seal-mini {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: var(--vermillion); color: white;
  font-family: var(--font-kai); font-size: 0.9rem;
  border-radius: 4px;
}
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { color: var(--ink); font-weight: 500; font-size: 0.95rem; font-family: var(--font-sans); }
.nav-links a:hover { color: var(--vermillion); }

/* --- Hero --- */
.hero {
  text-align: center;
  padding: 100px 24px 80px;
  background: linear-gradient(180deg, var(--paper) 0%, #EDE6D8 100%);
}
.hero h1 { font-size: 3.5rem; color: var(--ink); margin-bottom: 16px; }
.hero h1 .accent { color: var(--vermillion); }
.hero .subtitle { font-size: 1.25rem; color: var(--stone); margin: 0 auto 40px; max-width: 600px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius);
  font-size: 1rem; font-weight: 600; cursor: pointer;
  border: none; transition: all var(--transition);
  font-family: var(--font-sans);
}
.btn-primary { background: var(--vermillion); color: white; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: #A8322A; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--vermillion); border: 2px solid var(--vermillion); }
.btn-outline:hover { background: var(--vermillion); color: white; }
.btn-gold { background: var(--gold); color: white; }
.btn-gold:hover { background: #9E6E08; transform: translateY(-1px); }
.btn-verm { background: var(--vermillion); color: white; }
.btn-verm:hover { background: #A8322A; }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }

/* --- Feature Cards --- */
.features {
  padding: 80px 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}
.feature-card {
  background: white;
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--paper-dark);
  transition: all var(--transition);
  text-align: center;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.feature-card .icon { font-size: 2.5rem; margin-bottom: 16px; display: block; }
.feature-card .seal-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: var(--vermillion); color: white;
  font-family: var(--font-kai); font-size: 1.3rem;
  border-radius: 6px; margin-bottom: 16px;
  transform: rotate(-4deg);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}
.features.four-col { grid-template-columns: repeat(4, 1fr) !important; gap: 16px; }
.features.four-col .feature-card { padding: 26px 14px; min-width:0; }
.features.four-col .feature-card h3 { font-size: 1.05rem; }
.features.four-col .feature-card p { font-size: 0.85rem; }
@media (max-width: 850px) { .features.four-col { grid-template-columns: repeat(2, 1fr) !important; } }
.feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.feature-card p { color: var(--stone); font-size: 0.95rem; }

/* --- Section --- */
.section { padding: 80px 24px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-eyebrow {
  display: block;
  font-family: var(--font-serif);
  color: var(--vermillion);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  margin-bottom: 12px;
  font-weight: 600;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.section-subtitle {
  color: var(--stone);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* --- Stats --- */
.stats-band {
  background: var(--indigo);
  color: white;
  padding: 60px 24px;
}
.stats-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 32px; text-align: center;
}
.stat-num { font-family: var(--font-serif); font-size: 2.5rem; font-weight: 700; color: var(--gold-light); }
.stat-label { color: var(--stone-light); font-size: 0.85rem; margin-top: 4px; letter-spacing: 0.1em; }

/* --- Tool Page --- */
.tool-container { padding: 48px 24px; max-width: 800px; margin: 0 auto; }
.tool-tabs {
  display: flex; gap: 0; margin-bottom: 40px;
  border-radius: var(--radius); overflow: hidden;
}
.tool-tab {
  flex: 1; text-align: center; padding: 16px; cursor: pointer;
  font-weight: 600; font-size: 1rem;
  background: white; border: 2px solid var(--paper-dark);
  transition: all var(--transition);
}
.tool-tab:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.tool-tab:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.tool-tab.active { background: var(--vermillion); color: white; border-color: var(--vermillion); }
.tool-panel { display: none; }
.tool-panel.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.form-group { margin-bottom: 20px; }
.form-label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.95rem; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 14px 16px;
  border: 2px solid var(--paper-dark);
  border-radius: var(--radius);
  font-size: 1rem; font-family: var(--font-sans);
  background: white;
  transition: border-color var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--vermillion);
}
.form-textarea { min-height: 100px; resize: vertical; }
.form-hint { font-size: 0.85rem; color: var(--stone); margin-top: 6px; }

/* --- Results --- */
.results-section { margin-top: 48px; }
.result-card {
  background: white;
  border: 1px solid var(--paper-dark);
  border-radius: var(--radius);
  padding: 36px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
}
.result-card:hover { box-shadow: var(--shadow-md); }
.result-name-large {
  font-size: 3.5rem;
  text-align: center;
  margin-bottom: 8px;
  transition: font-family var(--transition);
  letter-spacing: 0.15em;
}
.font-sans .result-name-large { font-family: var(--font-sans); font-weight: 700; }
.font-serif .result-name-large { font-family: var(--font-serif); font-weight: 600; }
.font-kai .result-name-large { font-family: var(--font-kai); font-weight: 400; }
.result-pinyin {
  text-align: center; font-size: 1.2rem;
  color: var(--stone); margin-bottom: 20px;
}
.result-detail { margin-bottom: 14px; padding-left: 16px; border-left: 3px solid var(--vermillion); }
.result-detail .label { font-weight: 700; color: var(--vermillion); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.05em; }
.result-detail .value { margin-top: 4px; }
.result-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.tag {
  display: inline-block; padding: 4px 12px;
  border-radius: 20px; font-size: 0.85rem;
  background: var(--paper); color: var(--indigo); font-weight: 500;
}
.result-actions {
  display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap;
  padding-top: 20px; border-top: 1px solid var(--paper-dark);
}
.result-rank {
  position: absolute; top: 20px; right: 24px;
  font-family: var(--font-serif); color: var(--stone-light);
  font-size: 0.85rem;
}

/* --- Font Switcher --- */
.font-switcher {
  display: flex; gap: 8px; justify-content: center; align-items: center; margin-bottom: 32px;
}
.font-switcher .flabel {
  color: var(--stone); font-size: 0.85rem; margin-right: 8px; font-weight: 600;
}
.font-btn {
  padding: 8px 20px; border: 2px solid var(--paper-dark);
  border-radius: var(--radius); background: white;
  cursor: pointer; font-size: 0.9rem; font-weight: 500;
  transition: all var(--transition);
}
.font-btn.active { border-color: var(--vermillion); color: var(--vermillion); background: #FDF2F1; }

/* --- Credibility Badges --- */
.cred-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600;
}
.cred-historical { background: #E8F5E9; color: #2E7D32; }
.cred-academic { background: #FFF8E1; color: #F57F17; }
.cred-uncertain { background: #FFF3E0; color: #E65100; }
.cred-unknown { background: #FFEBEE; color: #C62828; }
.cred-folklore { background: #F3E5F5; color: #7B1FA2; }

/* --- Surname Page --- */
.surname-header {
  text-align: center; padding: 60px 24px 40px;
  background: linear-gradient(180deg, var(--paper) 0%, white 100%);
}
.surname-char { font-family: var(--font-kai); font-size: 8rem; color: var(--ink); line-height: 1; }
.surname-pinyin { font-size: 1.5rem; color: var(--stone); margin-top: 8px; }
.surname-rank { font-size: 1rem; color: var(--gold); margin-top: 4px; }
.surname-content { max-width: 720px; margin: 0 auto; padding: 40px 24px; }
.surname-content h2 {
  font-family: var(--font-serif); font-size: 1.5rem;
  margin-top: 40px; margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 2px solid var(--vermillion);
}
.surname-content p { margin-bottom: 16px; }

/* --- Surname Grid --- */
.surname-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.surname-card {
  display: block;
  background: white;
  border: 1px solid var(--paper-dark);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  transition: all var(--transition);
}
.surname-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.surname-card .char { font-family: var(--font-kai); font-size: 2.5rem; color: var(--ink); line-height: 1.1; }
.surname-card .pinyin { font-size: 0.85rem; color: var(--stone); margin-top: 4px; }
.surname-card .rank { font-size: 0.75rem; color: var(--gold); margin-top: 4px; }

/* --- Quote --- */
.quote-block {
  text-align: center; padding: 60px 24px; max-width: 700px; margin: 0 auto;
}
.quote-text { font-family: var(--font-serif); font-size: 1.8rem; color: var(--ink); line-height: 1.8; margin-bottom: 12px; }
.quote-attr { color: var(--stone); font-size: 0.9rem; }

/* --- Modal --- */
.modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  justify-content: center; align-items: center;
  padding: 24px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: white; border-radius: var(--radius);
  padding: 40px; max-width: 480px; width: 100%;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.modal h3 { text-align: center; margin-bottom: 16px; }
.modal-close {
  position: absolute; top: 16px; right: 16px;
  background: none; border: none; font-size: 1.5rem;
  cursor: pointer; color: var(--stone);
}
.price-tag { text-align: center; font-size: 2rem; font-weight: 700; color: var(--gold); margin-bottom: 20px; }

/* --- Loading --- */
.spinner {
  display: inline-block; width: 24px; height: 24px;
  border: 3px solid var(--paper-dark);
  border-top-color: var(--vermillion);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Footer --- */
.footer {
  background: var(--indigo); color: white;
  padding: 60px 24px 40px; margin-top: 80px;
}
.footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; }
.footer h4 { color: var(--gold); margin-bottom: 12px; font-family: var(--font-sans); font-size: 1rem; }
.footer a { color: var(--stone-light); font-size: 0.9rem; }
.footer a:hover { color: white; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-desc { color: var(--stone-light); font-size: 0.9rem; line-height: 1.8; }
.footer-bottom { text-align: center; padding: 20px 0 0; border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px; color: var(--stone-light); font-size: 0.85rem; }

.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.2rem; }
  .hero { padding: 60px 24px 50px; }
  .result-name-large { font-size: 2.5rem; }
  .surname-char { font-size: 5rem; }
  .nav-links { display: none; }
  .section { padding: 60px 16px; }
  .section-title { font-size: 1.6rem; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: 1fr; }
  .tool-container { padding: 32px 16px; }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
}