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

:root {
    --primary: #4472C4;
    --primary-dark: #2F5496;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-600: #6c757d;
    --gray-800: #343a40;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.5;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Navigation */
nav {
    background: var(--primary);
    padding: .75rem 0;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}
nav .container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}
nav .brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}
nav a {
    color: rgba(255,255,255,.85);
    text-decoration: none;
    font-size: .9rem;
    padding: .25rem .5rem;
    border-radius: 4px;
    transition: background .15s;
}
nav a:hover, nav a.active {
    background: rgba(255,255,255,.15);
    color: #fff;
}

/* Cards */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

/* Stats grid */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
    text-align: center;
}
.stat-card .number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}
.stat-card .label {
    font-size: .85rem;
    color: var(--gray-600);
    margin-top: .25rem;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: .6rem .75rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}
th {
    font-size: .8rem;
    text-transform: uppercase;
    color: var(--gray-600);
    font-weight: 600;
}
tr:hover td { background: var(--gray-100); }

/* Forms */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    font-weight: 600;
    font-size: .85rem;
    margin-bottom: .25rem;
    color: var(--gray-800);
}
input[type="text"],
input[type="password"],
input[type="number"],
input[type="email"],
select {
    width: 100%;
    padding: .5rem .75rem;
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    font-size: .9rem;
    transition: border-color .15s;
}
input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(68,114,196,.15);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: .5rem 1.25rem;
    border: none;
    border-radius: 4px;
    font-size: .9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #218838; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c82333; }
.btn-sm { padding: .3rem .75rem; font-size: .8rem; }

/* Alerts */
.alert {
    padding: .75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: .9rem;
}
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-danger { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-warning { background: #fff3cd; color: #856404; border: 1px solid #ffeeba; }
.alert-info { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }

/* Badge */
.badge {
    display: inline-block;
    padding: .15rem .5rem;
    border-radius: 10px;
    font-size: .75rem;
    font-weight: 600;
}
.badge-success { background: #d4edda; color: #155724; }
.badge-danger { background: #f8d7da; color: #721c24; }

/* Log output */
.log-output {
    background: var(--gray-800);
    color: #98fb98;
    font-family: 'Courier New', monospace;
    font-size: .8rem;
    padding: 1rem;
    border-radius: var(--radius);
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.6;
    white-space: pre-wrap;
}

/* Grid layout for forms */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
}
@media (max-width: 600px) {
    .form-grid { grid-template-columns: 1fr; }
}

.text-muted { color: var(--gray-600); font-size: .85rem; }
.mt-1 { margin-top: .5rem; }
.mb-1 { margin-bottom: .5rem; }
.mb-2 { margin-bottom: 1rem; }