/* css/style.css */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e9ecef;
}

h1 {
    color: #2c3e50;
    font-size: 28px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    margin: 0 5px;
    border: none;
    border-radius: 4px;
    text-decoration: none;
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.btn-primary {
    background: #3498db;
}

.btn-secondary {
    background: #95a5a6;
}

.btn-success {
    background: #2ecc71;
}

.btn-warning {
    background: #f39c12;
}

.btn-danger {
    background: #e74c3c;
}

.btn-info {
    background: #1abc9c;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

thead {
    background: #2c3e50;
    color: white;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

tbody tr:hover {
    background: #f8f9fa;
}

.status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    display: inline-block;
}

.status-active {
    background: #d4edda;
    color: #155724;
}

.status-inactive {
    background: #f8d7da;
    color: #721c24;
}

.status-graduated {
    background: #d1ecf1;
    color: #0c5460;
}

.status-suspended {
    background: #fff3cd;
    color: #856404;
}

/* Forms */
.student-form {
    max-width: 800px;
    margin: 0 auto;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 14px;
    color: #495057;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 8px 12px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

.form-actions {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #dee2e6;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 4px;
    margin: 15px 0;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    border-color: #28a745;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    border-color: #ffc107;
    color: #856404;
}

/* Search Box */
.search-box {
    margin: 20px 0;
}

.search-box form {
    display: flex;
    gap: 10px;
}

.search-box input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 14px;
}

.search-box input:focus {
    outline: none;
    border-color: #3498db;
}

/* Student Details */
.student-details {
    max-width: 600px;
    margin: 20px auto;
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
}

.detail-row {
    display: flex;
    padding: 10px 0;
    border-bottom: 1px solid #dee2e6;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-weight: 600;
    width: 150px;
    color: #495057;
}

.detail-value {
    flex: 1;
    color: #212529;
}

/* Delete Confirmation */
.delete-confirmation {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.student-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    text-align: left;
}

.student-info p {
    margin: 8px 0;
}

.delete-warning {
    color: #dc3545;
    font-weight: bold;
    font-size: 16px;
    margin: 20px 0;
}

/* Stats */
.stats {
    margin-top: 20px;
    padding: 15px;
    background: #e9ecef;
    border-radius: 4px;
    font-weight: 600;
    color: #495057;
}

.text-center {
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 14px;
    }
    
    th, td {
        padding: 8px 10px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .search-box form {
        flex-direction: column;
    }
    
    .detail-row {
        flex-direction: column;
        padding: 10px 0;
    }
    
    .detail-label {
        width: 100%;
        margin-bottom: 5px;
    }
}