:root {
    --bg-base: #0d1117;
    --bg-surface: #161b22;
    --bg-elevated: #1f262d;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --info: #58a6ff;
    --radius: 6px;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --font-system: -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html, body {
    height: 100%;
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-system);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.app-wrapper { display: flex; height: 100vh; }

.sidebar {
    width: 220px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
}

.sidebar-logo {
    padding: 16px 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}

.sidebar-nav { padding: 8px 0; flex: 1; }

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text-secondary);
    font-size: 13px;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}

.sidebar-nav a:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
    text-decoration: none;
}

.sidebar-nav a.active {
    color: var(--text-primary);
    background: var(--bg-elevated);
    border-left-color: var(--accent);
}

.main-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
    height: 48px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    flex-shrink: 0;
}

.topbar-sync { font-size: 12px; color: var(--text-muted); }
.topbar-sync .fresh { color: var(--success); }
.topbar-sync .stale { color: var(--danger); }

.topbar-user { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-secondary); }
.topbar-user a { color: var(--text-muted); font-size: 12px; }

.content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}

.card-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

/* KPI Tiles */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 24px; }

.kpi-tile {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}

.kpi-tile .label { font-size: 11px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 4px; }
.kpi-tile .value { font-size: 28px; font-family: var(--font-mono); color: var(--text-primary); }
.kpi-tile .delta { font-size: 12px; margin-top: 4px; }
.kpi-tile .delta.up { color: var(--success); }
.kpi-tile .delta.down { color: var(--danger); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
}

.btn:hover { background: var(--bg-elevated); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { opacity: 0.9; }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { opacity: 0.9; }

/* Inputs */
.input, .select {
    padding: 8px 12px;
    font-size: 13px;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.15s;
}

.input:focus, .select:focus { border-color: var(--accent); }
.input::placeholder { color: var(--text-muted); }

/* Tables */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table thead { background: var(--bg-elevated); }
.table th { padding: 10px 12px; text-align: left; font-weight: 600; color: var(--text-secondary); font-size: 11px; text-transform: uppercase; letter-spacing: 0.3px; }
.table td { padding: 10px 12px; border-top: 1px solid var(--border); }
.table tbody tr:hover { background: rgba(88, 166, 255, 0.04); }

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: 500;
    border-radius: 10px;
}

.badge-success { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.badge-warning { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.badge-danger { background: rgba(248, 81, 73, 0.15); color: var(--danger); }
.badge-info { background: rgba(88, 166, 255, 0.15); color: var(--info); }

/* Login page */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-base);
}

.login-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 360px;
}

.login-box h1 { font-size: 20px; margin-bottom: 24px; text-align: center; }
.login-box .form-group { margin-bottom: 16px; }
.login-box .form-group label { display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 4px; }
.login-box .input { width: 100%; }
.login-box .btn { width: 100%; justify-content: center; margin-top: 8px; }
.login-box .error { color: var(--danger); font-size: 12px; margin-bottom: 12px; text-align: center; }

/* Utility */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }