:root {
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --primary: #0056b3;
    --primary-light: #007bff;
    --text-dark: #333333;
    --text-muted: #666666;
    --accent: #17a2b8;
    --success: #28a745;
    --border-color: #e3e6f0;
}
* { box-sizing: border-box; margin: 0; padding: 0; font-family: sans-serif; }
body { background-color: var(--bg-color); color: var(--text-dark); }
.navbar { background-color: #1e293b; color: #ffffff; padding: 15px 30px; display: flex; justify-content: space-between; align-items: center; }
.navbar .logo { font-size: 24px; font-weight: bold; }
.navbar .logo span { color: var(--primary-light); }
.navbar .user-status { font-size: 14px; display: flex; align-items: center; gap: 8px; }
.status-indicator { width: 10px; height: 10px; background-color: var(--success); border-radius: 50%; display: inline-block; }
.container { max-width: 1300px; margin: 30px auto; padding: 0 20px; display: grid; grid-template-columns: 320px 1fr; gap: 25px; }
.card { background-color: var(--card-bg); border-radius: 8px; border: 1px solid var(--border-color); padding: 20px; margin-bottom: 20px; }
.profile-card { text-align: center; border-top: 4px solid var(--primary-light); }
.avatar { width: 70px; height: 70px; background-color: #e2e8f0; color: var(--primary); font-size: 24px; font-weight: bold; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 15px; }
.profile-card h3 { font-size: 18px; margin-bottom: 5px; }
.profile-card .email { font-size: 14px; color: var(--text-muted); margin-bottom: 15px; }
.badge { background-color: rgba(23, 162, 184, 0.1); color: var(--accent); padding: 4px 12px; font-size: 12px; border-radius: 50px; font-weight: 600; }
.preferences-card h4 { font-size: 15px; margin-bottom: 12px; color: var(--primary); border-bottom: 1px solid var(--border-color); padding-bottom: 5px; }
.preferences-card p { font-size: 14px; margin-bottom: 8px; }
.db-source { display: block; margin-top: 15px; font-size: 11px; color: #999; font-style: italic; }
.filter-card h2 { font-size: 20px; margin-bottom: 8px; color: #1e293b; }
.instruction { font-size: 13.5px; color: var(--text-muted); margin-bottom: 20px; }
.filter-group { display: flex; align-items: center; gap: 15px; flex-wrap: wrap; }
.filter-group label { font-size: 14px; font-weight: 600; }
.filter-group select { padding: 8px 12px; border-radius: 4px; border: 1px solid #cbd5e1; min-width: 260px; }
.btn { background-color: var(--primary-light); color: white; border: none; padding: 9px 20px; border-radius: 4px; cursor: pointer; font-weight: 600; }
.btn:hover { background-color: var(--primary); }
.table-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.perf-tag { background-color: #e2e8f0; padding: 3px 10px; font-size: 12px; border-radius: 4px; font-family: monospace; font-weight: bold; }
.perf-tag.success { background-color: rgba(40, 167, 69, 0.15); color: var(--success); }
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; }
th, td { padding: 12px 15px; border-bottom: 1px solid var(--border-color); }
th { background-color: #f8fafc; color: #475569; font-weight: 600; }
.empty-state { text-align: center; color: var(--text-muted); padding: 40px 0; font-style: italic; }
@media (max-width: 900px) { .container { grid-template-columns: 1fr; } }