/* ============================================================
   SERH Database Web App — Styles
   ============================================================ */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --accent: #e67e22;
  --accent-hover: #d35400;
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #dde1e6;
  --success: #27ae60;
  --danger: #e74c3c;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ——— Top Bar ——— */
.topbar {
  background: var(--primary);
  color: #fff;
  padding: 0 16px;
  height: 40px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.topbar-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar-left { display: flex; gap: 8px; align-items: center; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

.topbar-btn {
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(255,255,255,0.15);
  transition: background 0.2s;
  white-space: nowrap;
}
.topbar-btn:hover { background: rgba(255,255,255,0.3); }

.lang-select {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 13px;
  cursor: pointer;
  outline: none;
}
.lang-select option { color: #333; background: #fff; }

/* ——— Main Navigation ——— */
.main-nav {
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 40px;
  z-index: 999;
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 56px;
}
.nav-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
}
.nav-links { display: flex; gap: 4px; }
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  color: var(--text);
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}
.nav-link:hover { background: var(--bg); color: var(--primary); }
.nav-link.active {
  background: var(--primary);
  color: #fff;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--primary);
  padding: 4px 8px;
}

/* ——— Main Content ——— */
.main-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 16px;
  width: 100%;
  flex: 1;
}

.page-header {
  margin-bottom: 24px;
}
.page-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.page-header p {
  color: var(--text-light);
  font-size: 15px;
}

/* ——— Search Bar ——— */
.search-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}
.search-bar input {
  flex: 1;
  padding: 10px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.search-bar input:focus { border-color: var(--primary-light); }
.search-bar button {
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.search-bar button:hover { background: var(--accent-hover); }

/* ——— Table ——— */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.data-table th {
  background: var(--primary);
  color: #fff;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
}
.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.data-table tr:hover td { background: #f0f4f8; }
.data-table a {
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 500;
}
.data-table a:hover { text-decoration: underline; }
.data-table .badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  background: #e8f4fd;
  color: var(--primary-light);
}
.data-table .badge-success { background: #e8f8ef; color: var(--success); }
.data-table .badge-warn { background: #fef5e7; color: var(--accent); }

/* ——— Cards / Grid ——— */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.card h3 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 8px;
}
.card p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}
.card .card-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
}

/* ——— Hero / Home ——— */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 40px 32px;
  margin-bottom: 32px;
}
.hero h1 { font-size: 32px; margin-bottom: 8px; }
.hero .subtitle { font-size: 18px; opacity: 0.9; margin-bottom: 16px; }
.hero .desc { font-size: 15px; opacity: 0.85; max-width: 700px; margin-bottom: 24px; }
.hero .features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.hero .feature-item {
  background: rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
}
.hero .feature-item strong { display: block; font-size: 20px; margin-bottom: 4px; }
.hero .cta-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: background 0.2s;
}
.hero .cta-btn:hover { background: var(--accent-hover); }

/* ——— Filters ——— */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
  align-items: center;
}
.filter-bar select, .filter-bar input {
  padding: 8px 12px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  background: #fff;
}
.filter-bar select:focus { border-color: var(--primary-light); }
.filter-group { display: flex; align-items: center; gap: 6px; }
.filter-group label { font-size: 14px; color: var(--text-light); white-space: nowrap; }

/* ——— Pagination ——— */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
}
.pagination button {
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
  transition: all 0.2s;
}
.pagination button:hover { border-color: var(--primary-light); color: var(--primary); }
.pagination button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ——— Detail Page ——— */
.detail-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.detail-card h2 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.detail-item {
  display: flex;
  flex-direction: column;
}
.detail-item .label {
  font-size: 12px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.detail-item .value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 20px;
  transition: all 0.2s;
}
.btn-back:hover { border-color: var(--primary-light); color: var(--primary); }

/* ——— Footer ——— */
.footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 16px;
  font-size: 13px;
  margin-top: auto;
}

/* ——— Loading ——— */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-light);
  font-size: 16px;
}

/* ——— Responsive ——— */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-link { width: 100%; text-align: left; }
  .hamburger { display: block; }
  .hero { padding: 28px 20px; }
  .hero h1 { font-size: 24px; }
  .hero .subtitle { font-size: 16px; }
  .data-table { display: block; overflow-x: auto; }
  .filter-bar { flex-direction: column; align-items: stretch; }
}