/* Wedding Platform — Fresh & Clean UI */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&display=swap');

:root {
  --primary: #b8860b;
  --primary-light: #d4a843;
  --primary-pale: #fdf6e3;
  --primary-glow: rgba(212, 168, 67, 0.15);
  --accent: #c41e3a;
  --accent-pale: #fef2f2;
  --bg: #faf9f7;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f5f3ef;
  --text: #2c2c2c;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border: #e8e4dd;
  --border-light: #f0ece5;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== Layout ===== */
.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 440px; margin: 0 auto; padding: 0 24px; }

/* ===== Navbar ===== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 50;
}
.navbar .logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar .logo .xi { font-size: 24px; }
.navbar .nav-links { display: flex; gap: 8px; align-items: center; }
.navbar .nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.navbar .nav-links a:hover {
  color: var(--primary);
  background: var(--primary-glow);
  text-decoration: none;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 100px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '囍';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 280px;
  font-family: var(--font-serif);
  color: var(--primary);
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero h1 {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  line-height: 1.3;
}
.hero h1 .accent { color: var(--primary); }
.hero p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 480px;
  margin: 0 auto 40px;
  line-height: 1.8;
}
.hero .actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero .actions .btn { min-width: 160px; }

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 24px;
  text-align: center;
  letter-spacing: 0.06em;
}
.card-title .icon { margin-right: 6px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  letter-spacing: 0.04em;
  background: var(--bg-white);
  color: var(--text);
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: linear-gradient(135deg, #a07806, var(--primary)); box-shadow: 0 4px 20px rgba(184,134,11,0.3); }

.btn-danger {
  background: var(--accent-pale);
  border-color: rgba(196,30,58,0.2);
  color: var(--accent);
}
.btn-danger:hover { background: rgba(196,30,58,0.12); border-color: rgba(196,30,58,0.3); }

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-glow); }
.btn-outline.active { background: rgba(184,134,11,0.15); border-color: #b8860b; color: #8b6914; font-weight: 600; }

.btn-sm { padding: 7px 16px; font-size: 13px; border-radius: var(--radius-sm); }

/* ===== Forms ===== */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
.form-group input::placeholder { color: var(--text-muted); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group select {
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='10'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%239ca3af' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
  cursor: pointer;
}
.form-group select option { background: var(--bg-white); color: var(--text); }
.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }
.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.5;
}

/* ===== Alerts ===== */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 18px;
  display: none;
  font-weight: 500;
}
.alert.show { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.alert-error {
  background: var(--accent-pale);
  border: 1px solid rgba(196,30,58,0.15);
  color: var(--accent);
}
.alert-success {
  background: #f0fdf4;
  border: 1px solid rgba(34,197,94,0.15);
  color: #16a34a;
}

/* ===== Stats ===== */
.stats { display: flex; gap: 14px; margin-bottom: 28px; flex-wrap: wrap; }
.stat-card {
  flex: 1;
  min-width: 120px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 16px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.stat-card .num {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}
.stat-card .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border-light);
  overflow-x: auto;
}
.tab {
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
  background: none;
  font-family: inherit;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }

/* ===== Section ===== */
.section { margin-bottom: 36px; }
.section-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.04em;
}
.section-title .icon { font-size: 18px; }

/* ===== Image Grid ===== */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.image-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1;
  border: 1.5px solid var(--border);
  transition: var(--transition);
}
.image-item:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.image-item img { width: 100%; height: 100%; object-fit: cover; }
.image-item .delete-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(196,30,58,0.85);
  backdrop-filter: blur(4px);
  border: none;
  color: white;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
}
.image-item:hover .delete-btn { opacity: 1; transform: scale(1); }

/* ===== Upload Zone ===== */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 14px;
  background: var(--bg-subtle);
}
.upload-zone:hover { border-color: var(--primary); background: var(--primary-pale); }
.upload-zone.dragover { border-color: var(--primary); background: var(--primary-pale); transform: scale(1.01); }
.upload-zone .icon { font-size: 40px; margin-bottom: 12px; }
.upload-zone .hint { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 28px 24px;
  color: var(--text-muted);
  font-size: 12px;
  border-top: 1px solid var(--border-light);
  margin-top: 60px;
  letter-spacing: 0.04em;
}

/* ===== Page-specific: Features Grid ===== */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto 60px;
  padding: 0 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.feature-card .icon { font-size: 36px; margin-bottom: 12px; display: block; }
.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.feature-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== Page-specific: Buy Page ===== */
.buy-card {
  background: linear-gradient(135deg, var(--primary-pale), #fff);
  border: 1px solid rgba(184,134,11,0.2);
}
.buy-card .price {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin: 16px 0;
}
.buy-card .price .unit { font-size: 16px; font-weight: 400; color: var(--text-secondary); }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .navbar { padding: 12px 16px; }
  .navbar .nav-links a { padding: 6px 12px; font-size: 13px; }
  .hero { padding: 60px 16px 40px; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 15px; }
  .hero .actions { flex-direction: column; align-items: center; }
  .hero .actions .btn { width: 100%; max-width: 280px; }
  .card { padding: 24px 20px; border-radius: var(--radius); }
  .form-row { flex-direction: column; gap: 0; }
  .stats { flex-direction: column; }
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
  .features { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .feature-card { padding: 20px 14px; }
  .feature-card .icon { font-size: 28px; }
  table { min-width: 600px; }
}

/* ===== Spinner ===== */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(184,134,11,0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Decorative ===== */
.xi-deco {
  font-family: var(--font-serif);
  font-size: 64px;
  color: var(--accent);
  opacity: 0.12;
  position: absolute;
  pointer-events: none;
  user-select: none;
}
.divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  margin: 24px auto;
  border-radius: 1px;
}

/* ===== Print ===== */
@media print {
  .navbar, .footer { display: none; }
  body { background: #fff; color: #000; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}


@media (max-width: 768px) {
  .features { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}
@media (max-width: 480px) {
  .features { grid-template-columns: repeat(2, 1fr); gap: 10px; }
}