.scheduler-grid-wrap {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 0;
    container-type: inline-size;
    container-name: scheduler-grid-area;
}

.scheduler-grid-header {
    display: grid;
    grid-template-columns: var(--scheduler-time-gutter) repeat(var(--scheduler-day-count, 5), minmax(0, 1fr));
    gap: 0;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
    box-sizing: border-box;
    padding-right: var(--scheduler-scrollbar-w, 0px);
}

.scheduler-grid-corner {
    height: var(--scheduler-day-header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid var(--border);
}

.scheduler-corner-btn {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-radius: 10px;
    cursor: pointer;
}

.scheduler-corner-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.scheduler-body.is-sidebar-collapsed .scheduler-sidebar {
    display: none;
}

.scheduler-grid-day {
    height: var(--scheduler-day-header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--text-primary);
    border-left: 1px solid var(--border);
}

.scheduler-grid-day[hidden],
.scheduler-day-col[hidden] {
    display: none !important;
}

.scheduler-grid {
    --scheduler-minute: 1.05px;
    --scheduler-top-gap: 14px;
    --scheduler-block-gap: 6px;
    --scheduler-total-minutes: 660;
    display: grid;
    grid-template-columns: var(--scheduler-time-gutter) repeat(var(--scheduler-day-count, 5), minmax(0, 1fr));
    gap: 0;
    flex: 1;
    min-height: 0;
    overflow: auto;
    background: var(--bg-main);
}

.scheduler-times {
    padding-top: var(--scheduler-top-gap);
    border-right: 1px solid var(--border);
    background: var(--bg-card);
}

.scheduler-time-row {
    height: calc(var(--scheduler-minute) * 60);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: 0 clamp(6px, 0.65vw, 10px) 0 0;
    font-size: clamp(0.7rem, 0.67rem + 0.08vw, 0.78rem);
    color: var(--text-secondary);
    box-sizing: border-box;
}

.scheduler-day-col {
    position: relative;
    min-height: calc(var(--scheduler-minute) * var(--scheduler-total-minutes) + var(--scheduler-top-gap));
    border-left: 1px solid var(--border);
    background: linear-gradient(to bottom, var(--alpha-black-02) 0%, var(--alpha-black-02) 100%);
}

.scheduler-hour-line {
    position: absolute;
    left: var(--scheduler-block-inset);
    right: var(--scheduler-block-inset);
    height: 1px;
    border-top: none;
    background-image: repeating-linear-gradient(
        to right,
        color-mix(in srgb, var(--text-secondary) 25%, transparent) 0 2px,
        transparent 2px 6px
    );
    pointer-events: none;
    z-index: 6;
}

.scheduler-block {
    position: absolute;
    left: var(--scheduler-block-inset);
    right: var(--scheduler-block-inset);
    border: none;
    border-radius: clamp(7px, 0.7vw, 10px);
    color: var(--alpha-white-92);
    padding: clamp(4px, 0.75vh, 8px) clamp(5px, 0.65vw, 10px);
    text-align: left;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    z-index: 2;
}

.scheduler-block.scheduler-block-bg {
    z-index: 1;
    pointer-events: none;
    color: var(--alpha-white-85);
    background: var(--scheduler-blocked-bg);
}

.scheduler-modal.is-block-mode .scheduler-block.scheduler-block-bg {
    pointer-events: auto;
    cursor: pointer;
}

.scheduler-modal.is-block-mode .scheduler-block.scheduler-block-bg:hover {
    filter: brightness(1.06);
}

.scheduler-block.is-blocked-conflict {
    outline: 2px solid var(--tone-warning-500);
    box-shadow: 0 0 0 4px var(--alpha-warning-20);
}

.scheduler-block.is-preview {
    opacity: 0.38;
    pointer-events: none;
    filter: saturate(1.05);
    outline: 2px dashed var(--alpha-white-55);
    transform: scale(1.1);
    transform-origin: center;
    z-index: 3;
}

.scheduler-block.scheduler-block-ghost {
    z-index: 4;
    opacity: 0.55;
    background: var(--scheduler-blocked-preview-bg);
}

.scheduler-block.is-preview.is-preview-conflict {
    outline-color: var(--alpha-warning-85);
}

.scheduler-block.is-hover-highlight {
    outline: 2px solid var(--tone-success-500);
    box-shadow: 0 0 0 4px var(--alpha-bright-success-20), var(--shadow-sm);
}

.scheduler-block.is-conflict {
    outline: 2px solid var(--tone-danger-500);
    box-shadow: 0 0 0 4px var(--alpha-vivid-danger-20);
}

.scheduler-block.is-conflict.is-hover-highlight {
    box-shadow: 0 0 0 4px var(--alpha-vivid-danger-20), 0 0 0 8px var(--alpha-bright-success-12);
}

.scheduler-block.is-missing-coreq {
    outline: 2px solid var(--tone-warning-500);
    box-shadow: 0 0 0 4px var(--alpha-warning-20);
}

.scheduler-block-title {
    font-weight: 800;
    font-size: clamp(0.7rem, 0.64rem + 0.12vw, 0.82rem);
    line-height: 1.1;
}

.scheduler-block-time {
    margin-top: clamp(2px, 0.4vh, 4px);
    font-size: clamp(0.66rem, 0.62rem + 0.1vw, 0.76rem);
    opacity: 0.92;
}

.scheduler-header-btn.is-active {
    background: var(--bg-surface);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.scheduler-modal.is-block-mode .scheduler-day-col {
    cursor: crosshair;
}

.scheduler-legend-blocked {
    border-color: var(--alpha-blocked-65);
    background: var(--alpha-blocked-22);
}

.scheduler-blocked-hint {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.25;
    margin-bottom: 10px;
}

.scheduler-blocked-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.scheduler-blocked-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
}

.scheduler-blocked-label {
    font-size: 0.82rem;
    color: var(--text-primary);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.scheduler-blocked-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 10px;
}

@media (min-width: 641px) and (max-width: 960px) {
    .scheduler-modal {
        --scheduler-sidebar-size: clamp(250px, 28vw, 268px);
        --scheduler-time-gutter: clamp(46px, 5vw, 52px);
    }

    .scheduler-header {
        gap: 8px;
    }

    .scheduler-header-actions .scheduler-action-optional {
        display: none;
    }

    .scheduler-header .scheduler-more {
        display: inline-flex;
    }

    .scheduler-legend {
        gap: 6px 9px;
        font-size: 0.72rem;
    }
}

/* When the timetable itself is narrow, preserve course identity instead of
   wrapping it into unreadable fragments. Phone layouts have their own rules. */
@container scheduler-grid-area (max-width: 760px) {
    body:not(.is-mobile) .scheduler-block {
        left: 4px;
        right: 4px;
        padding: 4px 5px;
        border-radius: 7px;
    }

    body:not(.is-mobile) .scheduler-hour-line {
        left: 4px;
        right: 4px;
    }

    body:not(.is-mobile) .scheduler-block-title,
    body:not(.is-mobile) .scheduler-block-time {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    body:not(.is-mobile) .scheduler-block-title {
        font-size: 0.7rem;
    }

    body:not(.is-mobile) .scheduler-block-time {
        margin-top: 2px;
        font-size: 0.65rem;
    }

    body:not(.is-mobile) .scheduler-grid-day {
        font-size: 0.76rem;
    }
}

.course_info .course_type .ct-sep {
    color: var(--text-muted);
    font-weight: 400;
}

.course_info .course_credit {
    color: var(--text-muted);
}

.course_info .course_bs_credit {
    color: var(--text-muted);
}