:root {
    --primary: #0056b3;
    --primary-hover: #004085;
    --secondary: #6c757d;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --bg-light: #f8f9fa;
    --text-dark: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-light);
    color: var(--text-dark);
}

.main-navbar {
    background-color: #1e293b;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.main-navbar h2 { margin: 0; font-size: 1.4rem; }
.main-navbar h2 span { color: #38bdf8; }

.main-navbar ul {
    list-style: none;
    display: flex;
    gap: 15px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.main-navbar a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 4px;
    transition: background 0.2s;
}

.main-navbar a:hover { background-color: #334155; color: white; }

.btn-primary { background-color: var(--primary) !important; color: white !important; }
.btn-warning { background-color: var(--warning) !important; color: #111 !important; }

.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.main-footer {
    text-align: center;
    padding: 1.5rem;
    color: #666;
    font-size: 0.9rem;
    border-top: 1px solid #e0e0e0;
}