:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e293b;
    --light: #f1f5f9;
    --white: #ffffff;
    --border: #e2e8f0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-box {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h1 { text-align: center; margin-bottom: 30px; color: var(--primary); }
.login-box .logo { text-align: center; font-size: 48px; margin-bottom: 10px; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; }
.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
}
.form-control:focus { outline: none; border-color: var(--primary); }

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: var(--white); }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-secondary { background: var(--secondary); color: var(--white); }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 16px; font-size: 14px; }

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    height: 100vh;
    background: var(--dark);
    color: var(--white);
    padding: 20px 0;
}

.sidebar-header { padding: 0 20px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-header h2 { font-size: 20px; }

.sidebar-menu { list-style: none; margin-top: 20px; }
.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}
.sidebar-menu a:hover, .sidebar-menu a.active {
    background: rgba(255,255,255,0.1);
    color: var(--white);
}

.main-content { margin-left: 260px; padding: 30px; min-height: 100vh; }

.card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}
.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.card-body { padding: 20px; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}
.stat-card {
    background: var(--white);
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.stat-card .icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 24px;
}
.stat-card .icon.blue { background: rgba(37,99,235,0.1); color: var(--primary); }
.stat-card .icon.green { background: rgba(34,197,94,0.1); color: var(--success); }
.stat-card .icon.orange { background: rgba(245,158,11,0.1); color: var(--warning); }
.stat-card .value { font-size: 32px; font-weight: 700; }
.stat-card .label { color: var(--secondary); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--light); font-weight: 600; }
tr:hover { background: var(--light); }

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.badge-success { background: rgba(34,197,94,0.1); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.1); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.1); color: var(--danger); }

.progress { height: 8px; background: var(--light); border-radius: 4px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--primary); }

.alert { padding: 16px; border-radius: 8px; margin-bottom: 20px; }
.alert-success { background: rgba(34,197,94,0.1); color: var(--success); }
.alert-danger { background: rgba(239,68,68,0.1); color: var(--danger); }

.text-center { text-align: center; }
.text-muted { color: var(--secondary); }
.mt-20 { margin-top: 20px; }
.flex { display: flex; }
.gap-10 { gap: 10px; }