/* --- STICKY HEADER & COLUMN STYLES --- */

/* 1. Make the main schedule container scrollable */
#schedule-container {
    overflow: auto; /* Enable both horizontal and vertical scrolling */
    max-height: 75vh; /* Limit the height to 75% of the viewport height */
}

/* 2. Stick the top row (hours) */
#schedule-head th {
    position: sticky;
    top: 0;
    background-color: #f8f9fa;
    z-index: 2; /* Needs to be on top of the body rows */
}

/* 3. Stick the first column (days) */
#schedule-body .weekday-label {
    position: sticky;
    left: 0;
    background-color: #f8f9fa;
    z-index: 1; /* Sits above table cells but below the corner header */
}

/* 4. Fix the top-left corner cell so it's on top of everything */
#schedule-head th:first-child {
    left: 0; /* It also needs to stick to the left */
    z-index: 3; /* Highest z-index */
}

/* --- Original Course Block & Form Styles --- */

.course-block {
    padding: 0.5rem;
    border-radius: 0.25rem;
    color: #fff;
    background-color: #6c757d;
    border: 1px solid rgba(0,0,0,0.2);
    overflow: hidden;
    font-size: 0.8em;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out, opacity 0.2s ease-in-out;
}

.course-block.selected {
    background-color: #0d6efd;
    box-shadow: 0 0 10px rgba(13, 110, 253, 0.5);
}

.course-block.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: #6c757d;
}

.course-block .block-actions {
    position: absolute;
    top: 5px;
    right: 5px;
    display: none;
}

.course-block:hover .block-actions {
    display: block;
}

.course-block .block-actions i {
    color: white;
    background-color: rgba(0,0,0,0.3);
    border-radius: 50%;
    padding: 3px;
    margin-left: 3px;
    font-size: 0.9em;
}

.course-block .block-actions i:hover {
    background-color: rgba(0,0,0,0.6);
}

.day-time-entry {
    border-left: 3px solid #dee2e6;
    padding-left: 15px;
    margin-bottom: 10px;
}