:root {
    --primary: #64748b; /* Slate */
    --bg-gradient: linear-gradient(135deg, #f1f5f9, #e2e8f0, #cbd5e1);
}

.database-area {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-card {
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.form-card h3 {
    color: var(--primary);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 10px;
}

.student-form {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: flex-end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
    min-width: 150px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: bold;
    color: #475569;
}

.form-group input, .form-group select {
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    font-family: inherit;
    font-size: 1rem;
}

.table-card {
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 15px;
}

.table-header h3 {
    color: var(--primary);
}

.action-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-export, .btn-import {
    background: #10b981;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: bold;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.3);
    transition: 0.2s;
    display: inline-block;
}

.btn-import {
    background: #f59e0b;
    box-shadow: 0 4px 6px rgba(245, 158, 11, 0.3);
}

.btn-export:hover { background: #059669; transform: translateY(-2px); }
.btn-import:hover { background: #d97706; transform: translateY(-2px); }

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    background-color: #f8fafc;
    color: #334155;
    font-weight: bold;
}

tr:hover {
    background-color: #f1f5f9;
}

.btn-delete {
    background: #ef4444;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-delete:hover {
    background: #dc2626;
}

.empty-state {
    text-align: center;
    padding: 30px;
    color: #94a3b8;
    font-style: italic;
}

.hidden {
    display: none;
}