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

:root {
  --primary: #4a90d9;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #e1e8ed;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 860px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.site-header nav a {
  margin-left: 20px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-header nav a:hover { color: var(--primary); }

/* Search page */
.search-page { padding: 32px 0; }
.search-page h1 { font-size: 1.6rem; margin-bottom: 20px; }

.search-box {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.search-input {
  flex: 1;
  padding: 12px 16px;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s;
}
.search-input:focus { border-color: var(--primary); }
.search-btn {
  padding: 12px 28px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.search-btn:hover { background: #3a7bc8; }

/* Filter */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.filter-bar select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  background: var(--card);
}

/* Status */
.search-status {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 12px;
  min-height: 1.4em;
}

/* Results */
.search-results { list-style: none; }
.result-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
  transition: box-shadow 0.2s;
}
.result-item:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.07); }
.result-title a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  word-break: break-all;
}
.result-title a:hover { color: var(--primary); }
.result-meta {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.78rem;
  background: #eef2f7;
  color: #5a6c7d;
}
.tag-cloud { background: #e8f4e8; color: #2e7d32; }
.tag-size { background: #fff3e0; color: #e65100; }
.tag-date { background: #e3f2fd; color: #1565c0; }
.tag-source { background: #f3e5f5; color: #6a1b9a; }
.result-note {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}
.page-btn {
  padding: 8px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}
.page-btn:hover { border-color: var(--primary); color: var(--primary); }
.page-info { font-size: 0.9rem; color: var(--text-light); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  margin-top: 40px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}