/* Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Forms */
.form-container {
    max-width: 600px;
    margin: 20px auto;
    padding: 25px;
    background: #fff;
    border-radius: 8px;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

input[type="text"],
input[type="date"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

textarea {
    resize: vertical;
    min-height: 100px;
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

.data-table th {
    background-color: #3498db;
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9em;
}

.data-table tr:hover {
    background-color: #f8f9fa;
}

.data-table tr:nth-child(even) {
    background-color: #f8f9fa;
}

/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

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

.btn-success:hover {
    background-color: #27ae60;
}

/* Messages */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Pagination */
.pagination {
    margin: 20px 0;
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.pagination a {
    padding: 8px 12px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.pagination a:hover {
    background-color: #2980b9;
}

.pagination a[style*="bold"] {
    background-color: #2980b9;
    font-weight: bold;
}

/* Sort Arrows */
.sort-arrow {
    color: rgba(255,255,255,0.6);
    font-size: 0.8em;
}

/* Hierarchy Badges */
.hierarchy-badge {
    display: inline-block;
    padding: 4px 8px;
    background-color: #ecf0f1;
    border-radius: 4px;
    margin: 2px;
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .data-table {
        display: block;
        overflow-x: auto;
    }
    
    .form-container {
        padding: 15px;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .data-table td:nth-child(4),
    .data-table th:nth-child(4) {
        white-space: nowrap;
    }
}

@media print {
    .no-print {
        display: none;
    }
    
    .data-table {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}