/* Main CSS Styles */
body {
    font-family: 'Montserrat', sans-serif;
    background-color: #f0f4f8;
}

.gradient-bg {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.tab-active {
    color: #2563eb;
    border-bottom: 3px solid #2563eb;
}

.schedule-cell {
    min-height: 100px;
}

.schedule-item {
    border-left: 4px solid;
}

.tooltip {
    position: relative;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

.course-card.selected {
    border: 2px solid #2563eb;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(37, 99, 235, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.pulse-animation {
    animation: pulse 2s infinite;
}