/* Student Sessions Styles */
.sessions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 30px;
}

.sessions-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.sessions-section h2 {
    margin-top: 0;
    margin-bottom: 20px;
    color: #2c3e50;
}

.session-status-header {
    margin: 20px 0 10px 0;
    color: #666;
    font-size: 1.1em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.classes-list,
.sessions-list {
    margin-top: 20px;
}

.class-card,
.session-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.class-card:hover,
.session-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.session-card.active {
    border: 2px solid #28a745;
    background: #d4edda;
    animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
    0% { border-color: #28a745; }
    50% { border-color: #5cb85c; }
    100% { border-color: #28a745; }
}

.class-card h3,
.session-card h3 {
    margin-top: 0;
    margin-bottom: 10px;
    color: #333;
}

.class-card p,
.session-card p {
    margin: 5px 0;
    color: #666;
}

.teacher-name,
.session-teacher {
    font-weight: 600;
    color: #495057;
}

.session-class {
    font-size: 0.9em;
    color: #6c757d;
}

.session-time {
    font-size: 0.9em;
    color: #6c757d;
    margin-top: 10px;
}

.session-actions {
    margin-top: 15px;
}

.session-countdown {
    display: inline-block;
    padding: 8px 16px;
    background: #f0f0f0;
    border-radius: 6px;
    font-size: 0.9em;
    color: #666;
}

.empty-state {
    text-align: center;
    color: #999;
    font-style: italic;
    padding: 40px 20px;
}

/* Button Styles */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .sessions-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}