/* Shared navigation & auth UI — does not affect SEO content blocks */

:root {
  --site-header-h: 72px;
  --site-primary: #667eea;
  --site-primary-dark: #5a67d8;
  --site-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body.has-fixed-header {
  padding-top: var(--site-header-h);
}

/* Header */
.site-header,
header.header {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.site-header .nav,
header.header .nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0;
  flex-wrap: nowrap;
}

.site-header .logo,
header.header .logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--site-primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-header .nav-links,
header.header .nav-links {
  display: flex;
  list-style: none;
  gap: 0.35rem 0.85rem;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  flex: 1;
  margin: 0 0.5rem;
  padding: 0;
}

.site-header .nav-links a,
header.header .nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  font-size: 0.9rem;
  white-space: nowrap;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.site-header .nav-links a:hover,
header.header .nav-links a:hover {
  color: var(--site-primary);
  background: rgba(102, 126, 234, 0.08);
}

.site-auth {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.auth-buttons {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn-login,
.btn-register {
  padding: 0.45rem 0.9rem;
  border-radius: 20px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
  transition: all 0.2s;
}

.btn-login {
  color: var(--site-primary);
  border: 2px solid var(--site-primary);
  background: transparent;
}

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

.btn-register {
  background: var(--site-primary);
  color: #fff;
  border: 2px solid var(--site-primary);
}

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

/* Compact user menu */
.site-user-menu,
.user-info.site-user-menu {
  position: relative;
}

.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid #e5e7eb;
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  max-width: 220px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--site-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.user-nickname,
#userNickname {
  font-size: 0.85rem;
  font-weight: 600;
  color: #333;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100px;
}

.user-level-badge,
#userLevelBadge {
  font-size: 0.7rem;
  background: #ede9fe;
  color: #5b21b6;
  padding: 0.1rem 0.4rem;
  border-radius: 8px;
  white-space: nowrap;
}

.user-menu-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 160px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  padding: 0.35rem 0;
  z-index: 1100;
}

.user-menu-dropdown[hidden] {
  display: none !important;
}

.user-menu-dropdown a,
.user-menu-dropdown button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.55rem 1rem;
  color: #333;
  text-decoration: none;
  font-size: 0.9rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.user-menu-dropdown a:hover,
.user-menu-dropdown button:hover {
  background: #f3f4f6;
}

.user-menu-dropdown button {
  color: #dc2626;
  border-top: 1px solid #f3f4f6;
  margin-top: 0.25rem;
  padding-top: 0.65rem;
}

/* Hide legacy duplicate user blocks on bazi page */
#userStatus.user-status {
  display: none !important;
}

/* Legacy bazi header user-info — collapse to menu via JS */
header .user-level-info,
header .user-actions .btn-upgrade,
header .user-actions .btn-profile {
  display: none !important;
}

header .user-actions .btn-logout {
  display: none !important;
}

/* Mobile menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.45rem;
  line-height: 1;
  cursor: pointer;
  color: #333;
  padding: 0.25rem 0.5rem;
  border-radius: 8px;
}

.mobile-menu-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}

@media (max-width: 1024px) {
  .site-header .nav-links,
  header.header .nav-links {
    gap: 0.25rem 0.5rem;
  }

  .site-header .nav-links a,
  header.header .nav-links a {
    font-size: 0.82rem;
  }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
    order: 3;
    margin-left: auto;
  }

  .site-header .nav,
  header.header .nav {
    flex-wrap: wrap;
    align-items: center;
  }

  .site-header .nav-links,
  header.header .nav-links {
    display: none;
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 0.5rem 0 0.75rem;
    border-top: 1px solid #eee;
  }

  .site-header .nav-links.is-open,
  header.header .nav-links.is-open {
    display: flex;
  }

  .site-header .nav-links li,
  header.header .nav-links li {
    width: 100%;
  }

  .site-header .nav-links a,
  header.header .nav-links a {
    display: block;
    padding: 0.65rem 0.75rem;
    font-size: 1rem;
  }

  .site-auth {
    order: 2;
    margin-left: 0.5rem;
  }

  .user-nickname,
  #userNickname {
    max-width: 72px;
  }
}

/* Article page: 擴展閱讀（白底卡片，避免落在漸層背景上無樣式） */
.read-more {
  max-width: 1200px;
  width: calc(100% - 40px);
  margin: -0.5rem auto 1.5rem;
  padding: 2rem 3rem;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.read-more h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: #333;
}

.link-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.link-cluster a {
  background: #f3f4f6;
  color: #374151;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s;
}

.link-cluster a:hover {
  background: #e5e7eb;
}

@media (max-width: 768px) {
  .read-more {
    padding: 1.5rem 1.25rem;
    width: calc(100% - 24px);
  }
}

/* Footer on gradient article pages */
footer.site-footer {
  background: rgba(0, 0, 0, 0.35);
  text-align: center;
  padding: 2rem 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.9rem;
}

footer.site-footer a {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: none;
}

footer.site-footer a:hover {
  text-decoration: underline;
  color: #fff;
}

/* Form grid helper */
.form-grid-balanced {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}