/* Assignment Tracker Styles */

.assignment-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.assignment-header .service-heading {
    color: white;
    margin-bottom: 1rem;
    font-size: 2.5rem;
    font-weight: 700;
}

.assignment-header .para {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Stats Container */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    color: white;
}

.stat-info p {
    margin: 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.action-buttons .btn {
    border-radius: 25px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.action-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Filters Container */
.filters-container {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
}

.filters-container .form-select,
.filters-container .form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: border-color 0.3s ease;
}

.filters-container .form-select:focus,
.filters-container .form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* Assignments List */
.assignments-list {
    display: grid;
    gap: 1.5rem;
}

.assignment-card {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.assignment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.assignment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--priority-color, #6c757d);
}

.assignment-card.high-priority::before {
    background: #dc3545;
}

.assignment-card.medium-priority::before {
    background: #ffc107;
}

.assignment-card.low-priority::before {
    background: #28a745;
}

.assignment-header-info {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.assignment-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2c3e50;
    margin: 0;
    flex: 1;
}

.assignment-actions {
    display: flex;
    gap: 0.5rem;
}

.assignment-actions .btn {
    padding: 0.5rem;
    border-radius: 8px;
    border: none;
    transition: all 0.3s ease;
}

.assignment-actions .btn:hover {
    transform: scale(1.1);
}

.assignment-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.meta-item i {
    width: 16px;
    color: #667eea;
}

.assignment-description {
    color: #6c757d;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.assignment-progress {
    margin-bottom: 1rem;
}

.progress {
    height: 8px;
    border-radius: 10px;
    background: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    border-radius: 10px;
    transition: width 0.3s ease;
}

.progress-bar.bg-danger {
    background: linear-gradient(90deg, #dc3545, #ff6b6b) !important;
}

.progress-bar.bg-warning {
    background: linear-gradient(90deg, #ffc107, #ffd93d) !important;
}

.progress-bar.bg-success {
    background: linear-gradient(90deg, #28a745, #20c997) !important;
}

.assignment-deadline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.deadline-urgent {
    color: #dc3545;
}

.deadline-warning {
    color: #ffc107;
}

.deadline-safe {
    color: #28a745;
}

/* Status Badges */
.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-not-started {
    background: #f8f9fa;
    color: #6c757d;
    border: 1px solid #dee2e6;
}

.status-in-progress {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.status-submitted {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

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

/* Calendar View */
.calendar-view {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.calendar-header h3 {
    margin: 0;
    color: #2c3e50;
    font-weight: 600;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: #e9ecef;
    border-radius: 10px;
    overflow: hidden;
}

.calendar-day {
    background: white;
    padding: 1rem;
    min-height: 100px;
    border: 1px solid #e9ecef;
    position: relative;
    transition: background-color 0.3s ease;
}

.calendar-day:hover {
    background: #f8f9fa;
}

.calendar-day.other-month {
    background: #f8f9fa;
    color: #adb5bd;
}

.calendar-day.today {
    background: #e3f2fd;
    border: 2px solid #2196f3;
}

.calendar-day-number {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.calendar-assignments {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.calendar-assignment {
    background: #667eea;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.calendar-assignment:hover {
    background: #5a6fd8;
    transform: scale(1.05);
}

.calendar-assignment.high-priority {
    background: #dc3545;
}

.calendar-assignment.medium-priority {
    background: #ffc107;
    color: #000;
}

.calendar-assignment.low-priority {
    background: #28a745;
}

/* Modal Styles */
.modal-content {
    border-radius: 15px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px 15px 0 0;
    border: none;
}

.modal-header .btn-close {
    filter: invert(1);
}

.modal-title {
    font-weight: 600;
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    border: none;
    padding: 1rem 2rem 2rem;
}

/* Form Styles */
.form-label {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-control,
.form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: #adb5bd;
}

.empty-state h3 {
    margin-bottom: 1rem;
    color: #495057;
}

.empty-state p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .assignment-header .service-heading {
        font-size: 2rem;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
    
    .assignment-meta {
        grid-template-columns: 1fr;
    }
    
    .calendar-grid {
        grid-template-columns: repeat(7, 1fr);
    }
    
    .calendar-day {
        min-height: 80px;
        padding: 0.5rem;
    }
    
    .calendar-assignment {
        font-size: 0.6rem;
        padding: 0.2rem 0.4rem;
    }
}

@media (max-width: 576px) {
    .assignment-header {
        padding: 2rem 0;
    }
    
    .assignment-header .service-heading {
        font-size: 1.75rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-footer {
        padding: 1rem;
    }
    
    .calendar-day {
        min-height: 60px;
        padding: 0.25rem;
    }
    
    .calendar-day-number {
        font-size: 0.8rem;
    }
}

/* Dark Mode Support */
.dark-mode .assignment-card {
    background: #2c3e50;
    border-color: #34495e;
    color: #ecf0f1;
}

.dark-mode .assignment-title {
    color: #ecf0f1;
}

.dark-mode .assignment-description {
    color: #bdc3c7;
}

.dark-mode .meta-item {
    color: #bdc3c7;
}

.dark-mode .filters-container {
    background: #2c3e50;
    border-color: #34495e;
}

.dark-mode .calendar-view {
    background: #2c3e50;
    border-color: #34495e;
}

.dark-mode .calendar-day {
    background: #34495e;
    border-color: #2c3e50;
    color: #ecf0f1;
}

.dark-mode .calendar-day.other-month {
    background: #2c3e50;
    color: #7f8c8d;
}

.dark-mode .calendar-day.today {
    background: #1a252f;
    border-color: #3498db;
}

.dark-mode .form-control,
.dark-mode .form-select {
    background: #34495e;
    border-color: #2c3e50;
    color: #ecf0f1;
}

.dark-mode .form-control:focus,
.dark-mode .form-select:focus {
    background: #34495e;
    border-color: #667eea;
    color: #ecf0f1;
}

.dark-mode .form-label {
    color: #ecf0f1;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* 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 #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Login Required Styles */
.login-required {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
}

.login-required-content {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    width: 100%;
}

.login-required-content i {
    font-size: 4rem;
    color: #667eea;
    margin-bottom: 1.5rem;
}

.login-required-content h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: 700;
}

.login-required-content p {
    color: #6c757d;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.login-required-content .btn {
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 10px;
}

/* Dark mode for login required */
.dark-mode .login-required-content {
    background: #2c3e50;
    color: #ecf0f1;
}

.dark-mode .login-required-content h2 {
    color: #ecf0f1;
}

.dark-mode .login-required-content p {
    color: #bdc3c7;
}