/* SVTR Database - 数据库主入口页样式 */

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

body {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--text-primary);
  min-height: 100vh;
}

/* ---- 顶部导航（与 data-rankings 一致） ---- */
.top-nav {
  background: rgba(30, 41, 59, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
}

/* 覆盖 header-enhancements.css 的 position:fixed，让图标留在 flex 布局中 */
.top-nav .header-actions {
  position: static;
  z-index: auto;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.3s;
}

.logo:hover {
  color: var(--primary-color);
}

.tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 1rem;
  border-left: 2px solid var(--border-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-light);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-color);
}

/* ---- 主容器 ---- */
.database-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* ---- Hero 区 ---- */
.db-hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
}

.db-hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--primary-light), #a78bfa, #f472b6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.db-hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

/* ---- 搜索框 ---- */
.db-search-box {
  max-width: 700px;
  margin: 0 auto 3rem;
}

.db-search-form {
  display: flex;
  gap: 0;
  background: rgba(30, 41, 59, 0.7);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color 0.3s;
}

.db-search-form:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.db-search-input {
  flex: 1;
  padding: 1rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.0625rem;
  outline: none;
}

.db-search-input::placeholder {
  color: var(--text-muted);
}

.db-search-btn {
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
  border: none;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.3s;
  white-space: nowrap;
}

.db-search-btn:hover {
  opacity: 0.9;
}

/* ---- 高级筛选栏 ---- */
.db-filter-bar {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.db-filter-select {
  padding: 0.5rem 0.75rem;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: border-color 0.3s;
  min-width: 100px;
}

.db-filter-select:focus {
  border-color: var(--primary-color);
  outline: none;
}

.db-filter-select option,
.db-filter-select optgroup {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.db-filter-reset {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s;
}

.db-filter-reset:hover {
  border-color: var(--danger-color);
  color: #fca5a5;
}

/* ---- 分页 ---- */
.db-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1rem;
}

.db-page-btn {
  padding: 0.5rem 1.25rem;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s;
}

.db-page-btn:hover:not(:disabled) {
  border-color: var(--primary-color);
  color: var(--primary-light);
}

.db-page-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.db-page-info {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ---- 结果标签/子名称 ---- */
.db-result-sub {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.875rem;
}

.db-result-tags {
  font-size: 0.75rem;
  color: var(--primary-light);
  margin-top: 0.25rem;
  opacity: 0.8;
}

.db-result-info {
  flex: 1;
  min-width: 0;
}

.db-section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-left: 0.25rem;
  letter-spacing: 0.02em;
}

/* ---- 功能卡片 ---- */
.db-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.db-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: all 0.3s;
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
  overflow: hidden;
}

.db-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.2);
}

.db-card.active {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.08);
}

.db-card.coming-soon {
  opacity: 0.65;
  cursor: default;
}

.db-card.coming-soon:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--border-color);
}

.db-card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.db-card-title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.db-card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.db-card-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.db-card-badge.live {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.db-card-badge.soon {
  background: rgba(245, 158, 11, 0.15);
  color: #fcd34d;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.db-card-arrow {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--text-muted);
  transition: all 0.3s;
}

.db-card:hover .db-card-arrow {
  color: var(--primary-light);
  transform: translateY(-50%) translateX(4px);
}

/* ---- 搜索结果区 ---- */
.db-search-results {
  margin-bottom: 3rem;
  display: none;
}

.db-search-results.visible {
  display: block;
}

.db-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.db-results-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.db-results-close {
  padding: 0.5rem 1rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  color: #fca5a5;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.3s;
}

.db-results-close:hover {
  background: rgba(239, 68, 68, 0.2);
}

.db-results-list {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.db-result-item {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}

.db-result-item:last-child {
  border-bottom: none;
}

.db-result-item:hover {
  background: rgba(99, 102, 241, 0.05);
}

.db-result-name {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.db-result-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.db-result-funding {
  font-weight: 700;
  color: var(--primary-light);
  white-space: nowrap;
}

.db-results-empty {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
}

.db-results-loading {
  text-align: center;
  padding: 2rem;
}

.db-results-loading .loading-spinner {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

/* ---- Stats 摘要 ---- */
.db-stats-bar {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding: 1.5rem 2rem;
  background: rgba(30, 41, 59, 0.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  margin-bottom: 3rem;
}

.db-stat-item {
  text-align: center;
}

.db-stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-light);
  display: block;
}

.db-stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ---- 底部 ---- */
.db-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.db-footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.db-footer a {
  color: var(--primary-light);
  text-decoration: none;
}

.db-footer a:hover {
  text-decoration: underline;
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
  .database-container {
    padding: 1rem;
  }

  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    width: 100%;
    justify-content: space-around;
  }

  .db-hero-title {
    font-size: 1.75rem;
  }

  .db-search-form {
    flex-direction: column;
    border-radius: var(--radius-lg);
  }

  .db-search-btn {
    border-radius: 0;
    padding: 0.875rem;
  }

  .db-cards-grid {
    grid-template-columns: 1fr;
  }

  .db-stats-bar {
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
  }

  .db-filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .db-filter-select {
    width: 100%;
  }
}

/* ---- Loading spinner (shared) ---- */
.loading-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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