/**
 * Frontend CSS for Student Reports Plugin
 */

/* General Styles */
.student-reports-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

/* Dashboard Styles */
.dashboard-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
}

.dashboard-header h1 {
    margin: 0 0 10px 0;
    font-size: 2.5em;
    font-weight: 300;
}

.dashboard-header p {
    margin: 0;
    font-size: 1.1em;
    opacity: 0.9;
}

/* Grid Layouts */
.classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

/* Cards */
.class-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #007cba;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.class-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.student-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e9ecef;
    transition: all 0.2s ease;
}

.student-card:hover {
    background: #e9ecef;
    transform: translateY(-1px);
}

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

.class-header h3 {
    margin: 0;
    color: #333;
    font-size: 1.3em;
}

.subject-badge {
    background: linear-gradient(135deg, #007cba 0%, #005a87 100%);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.class-details p {
    margin: 8px 0;
    color: #666;
    font-size: 0.95em;
}

.class-actions {
    margin-top: 20px;
}

/* Buttons */
.button {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.button-primary {
    background: linear-gradient(135deg, #007cba 0%, #005a87 100%);
    color: white;
}

.button-primary:hover {
    background: linear-gradient(135deg, #005a87 0%, #004466 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 122, 186, 0.3);
}

.button-secondary {
    background: #6c757d;
    color: white;
}

.button-secondary:hover {
    background: #5a6268;
    transform: translateY(-1px);
}

.button-small {
    padding: 6px 12px;
    font-size: 12px;
}

/* Modals */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: none;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 25px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
    border-radius: 12px 12px 0 0;
}

.modal-header h2 {
    margin: 0;
    color: #333;
    font-size: 1.5em;
}

.close {
    font-size: 28px;
    cursor: pointer;
    color: #666;
    transition: color 0.2s ease;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close:hover {
    color: #000;
    background: #f0f0f0;
}

.modal-body {
    padding: 25px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 0.95em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #007cba;
    box-shadow: 0 0 0 3px rgba(0, 122, 186, 0.1);
}

.form-group small {
    color: #666;
    font-size: 12px;
    margin-top: 5px;
    display: block;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

/* Status Indicators */
.status-draft {
    background: #ffc107;
    color: #000;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.status-pending {
    background: #fd7e14;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.status-approved {
    background: #28a745;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.status-sent {
    background: #17a2b8;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

/* Tables */
.reports-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.reports-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Progress Charts */
.progress-chart {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

.chart-container {
    height: 300px;
    position: relative;
}

/* Responsive Design */
@media (max-width: 768px) {
    .classes-grid {
        grid-template-columns: 1fr;
    }
    
    .students-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .button {
        width: 100%;
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .dashboard-header h1 {
        font-size: 2em;
    }
    
    .class-card {
        padding: 20px;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #007cba;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error States */
.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 6px;
    margin: 10px 0;
    border: 1px solid #f5c6cb;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 12px;
    border-radius: 6px;
    margin: 10px 0;
    border: 1px solid #c3e6cb;
}

/* No Data States */
.no-assignments,
.no-students,
.no-reports {
    text-align: center;
    padding: 40px 20px;
    color: #666;
    background: #f8f9fa;
    border-radius: 8px;
    border: 2px dashed #dee2e6;
}

.no-assignments h3,
.no-students h3,
.no-reports h3 {
    margin: 0 0 10px 0;
    color: #333;
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus states for accessibility */
.button:focus,
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: 2px solid #007cba;
    outline-offset: 2px;
}