:root {
    --primary-color: #0d233a;
    --accent-color: #1a73e8;
    --success-color: #27ae60;
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-color: #cccccc;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.login-card {
    max-width: 450px;
    margin: 80px auto;
    background: var(--card-bg);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border-top: 5px solid var(--accent-color);
}

.login-card h2 {
    margin-top: 0;
    color: var(--primary-color);
    text-align: center;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 0.9em;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 12px;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    box-sizing: border-box;
}

.btn:hover {
    opacity: 0.9;
}

.btn-secondary {
    background-color: #6c757d;
    margin-top: 10px;
}

.btn-success {
    background-color: var(--success-color);
    width: auto;
    padding: 8px 15px;
}

.btn-danger {
    background-color: #d9534f;
    width: auto;
    padding: 8px 15px;
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow-y: auto;
}

.modal-content {
    background-color: #fff;
    margin: 30px auto;
    padding: 30px;
    width: 90%;
    max-width: 700px;
    border-radius: 8px;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

@media (max-width: 600px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

.table-admin {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    margin-top: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.table-admin th, .table-admin td {
    padding: 12px;
    border: 1px solid #e2e8f0;
    text-align: left;
    font-size: 0.9em;
}

.table-admin th {
    background-color: var(--primary-color);
    color: #fff;
}