/* =============================================================================
   Phase 4 CSS — Weekly Schedule / Calendar
   Append to wwwroot/css/app.css  OR  add as a separate phase4.css link
   ============================================================================= */

/* ── Schedule page header ────────────────────────────────────────────────── */
.schedule-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.schedule-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.week-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* ── Week navigation ─────────────────────────────────────────────────────── */
.week-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-md);
    padding: 3px;
}

.btn-week-nav {
    width: 32px; height: 32px;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    font-size: 18px;
    cursor: pointer;
    color: var(--slate-600);
    transition: background .15s;
    display: flex; align-items: center; justify-content: center;
}
.btn-week-nav:hover:not(:disabled) { background: var(--slate-100); }
.btn-week-nav:disabled             { opacity: .4; cursor: not-allowed; }

.btn-week-nav-text {
    width: auto;
    height: 32px;
    padding: 0 10px;
    font-size: 12.5px;
    font-weight: 600;
}

.btn-week-today {
    padding: 5px 14px;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    color: var(--blue-600);
    transition: background .15s;
}
.btn-week-today:hover:not(:disabled) { background: var(--blue-50); }

.week-picker-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.week-picker-label {
    font-size: 12px;
    color: var(--slate-600);
    font-weight: 600;
}

.week-picker-input {
    height: 32px;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-size: 12.5px;
    color: var(--slate-700);
    background: var(--white);
}

/* ── Calendar loading state ──────────────────────────────────────────────── */
.calendar-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 80px;
    color: var(--slate-400);
}

/* ── Calendar wrap card ──────────────────────────────────────────────────── */
.calendar-wrap {
    padding: 0;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 16px;
}

/* ── Calendar grid: 7 columns (time gutter + Mon-Sat) ─────────────────────── */
.calendar-grid {
    display: grid;
    grid-template-columns: 72px repeat(6, 1fr);
    min-width: 980px;
}

/* ── Header row cells ────────────────────────────────────────────────────── */
.cal-header-cell {
    height: 56px;
    border-bottom: 1px solid var(--slate-200);
    background: var(--slate-50);
}

.cal-day-header {
    height: 56px;
    border-bottom: 1px solid var(--slate-200);
    border-left: 1px solid var(--slate-100);
    background: var(--slate-50);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px;
}

.cal-day-header--today {
    background: var(--blue-50);
}

.cal-day-name {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .06em;
    color: var(--slate-500);
}

.cal-day-header--today .cal-day-name {
    color: var(--blue-600);
}

.cal-day-number {
    font-size: 13px;
    color: var(--slate-700);
}

.cal-day-number--today {
    background: var(--blue-600);
    color: var(--white);
    width: 210px; height: 26px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
    font-size: 13px;
    line-height: 1;
}

/* ── Time gutter label ───────────────────────────────────────────────────── */
.cal-time-label {
    height: 80px;
    border-bottom: 1px solid var(--slate-100);
    border-right: 1px solid var(--slate-200);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: 6px 8px 0 0;
}

.cal-time-label span {
    font-size: 11px;
    color: var(--slate-400);
    white-space: nowrap;
}

/* ── Calendar cell (one hour × one day) ──────────────────────────────────── */
.cal-cell {
    height: 80px;
    border-bottom: 1px solid var(--slate-100);
    border-left: 1px solid var(--slate-100);
    position: relative;
    padding: 2px;
    transition: background .1s;
}

.cal-cell--today {
    background: rgba(59,130,246,.03);
}

/* ── Event block inside a cell ───────────────────────────────────────────── */
.cal-event-block {
    position: absolute;
    left: 2px;
    right: 2px;
    top: 2px;
    border-radius: var(--radius-sm);
    border-left: 3px solid;
    padding: 4px 6px;
    cursor: pointer;
    overflow: hidden;
    transition: filter .15s, box-shadow .15s, transform .15s;
    z-index: 1;
}

.cal-event-block.cal-event-stacked {
    width: calc(100% - 16px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

.cal-event-block:hover {
    filter: brightness(.96);
    box-shadow: var(--shadow-md);
    z-index: 10 !important;
    transform: scale(1.02);
}

.cal-event-overflow {
    position: absolute;
    background: var(--slate-700);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 8px;
    pointer-events: none;
    z-index: 20;
    white-space: nowrap;
}

.cal-event-count-indicator {
    position: absolute;
    top: 6px;
    right: 6px;
    background: var(--slate-100);
    color: var(--slate-700);
    border: 1px solid var(--slate-200);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 8px;
    pointer-events: none;
    z-index: 15;
    white-space: nowrap;
}

.cal-event-time {
    font-size: 10.5px;
    font-weight: 600;
    color: var(--slate-600);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cal-event-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--slate-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px;
}

.cal-event-location {
    font-size: 11px;
    color: var(--slate-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Summary bar below calendar ──────────────────────────────────────────── */
.schedule-summary-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 0;
}

.schedule-legend {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    color: var(--slate-600);
}

.legend-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-label { white-space: nowrap; }

/* ── Slideover panel ─────────────────────────────────────────────────────── */
.slideover-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15,23,42,.25);
    z-index: 40;
    animation: fadeIn .15s ease;
}

.slideover {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 380px;
    max-width: 100vw;
    background: var(--white);
    box-shadow: -8px 0 32px rgba(0,0,0,.12);
    z-index: 50;
    display: flex;
    flex-direction: column;
    animation: slideInRight .2s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.slideover-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 24px;
    border-bottom: 1px solid var(--slate-200);
    gap: 12px;
}

.slideover-type {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--slate-500);
    margin-bottom: 4px;
}

.slideover-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--slate-900);
    margin: 0;
}

.slideover-close {
    font-size: 16px;
    flex-shrink: 0;
}

.slideover-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.slideover-detail-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 14px;
    color: var(--slate-700);
}

.slideover-icon {
    font-size: 18px;
    flex-shrink: 0;
    margin-top: 1px;
}

.slideover-notes {
    background: var(--slate-50);
    border-radius: var(--radius-md);
    padding: 14px;
}

.slideover-notes strong {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--slate-500);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 6px;
}

.slideover-notes p {
    font-size: 13.5px;
    color: var(--slate-700);
    line-height: 1.6;
    margin: 0;
}

.slideover-readonly-notice {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 12.5px;
    color: var(--slate-500);
    margin-top: auto;
}

/* ── Event detail page (EventDetail.razor) ───────────────────────────────── */
.breadcrumb-link {
    display: inline-block;
    font-size: 13px;
    color: var(--blue-600);
    text-decoration: none;
    margin-bottom: 8px;
}
.breadcrumb-link:hover { text-decoration: underline; }

.event-detail-card { padding: 32px; }

.event-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.event-detail-full {
    grid-column: 1 / -1;
}

.event-detail-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.event-detail-icon {
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.event-detail-item label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    color: var(--slate-400);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 3px;
}

.event-detail-item strong {
    font-size: 14px;
    color: var(--slate-800);
}

.event-readonly-notice {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 13px;
    color: var(--slate-500);
}

/* ── Mobile Schedule View (hidden by default, shown ≤768px) ─────────────── */
.mobile-schedule-view {
    display: none;
}

.mobile-day-tabs {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--slate-100);
    border-radius: var(--radius-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-bottom: 16px;
}

.mobile-day-tabs::-webkit-scrollbar { display: none; }

.mobile-day-tab {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 6px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    transition: all .15s;
}

.mobile-day-tab-name {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .04em;
    color: var(--slate-500);
    text-transform: uppercase;
}

.mobile-day-tab-date {
    font-size: 10px;
    color: var(--slate-400);
}

.mobile-day-tab--active {
    background: var(--white);
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
}

.mobile-day-tab--active .mobile-day-tab-name {
    color: var(--blue-600);
}

.mobile-day-tab--active .mobile-day-tab-date {
    color: var(--blue-500);
}

.mobile-day-tab--today .mobile-day-tab-name {
    position: relative;
}

.mobile-day-tab--today .mobile-day-tab-date::after {
    content: '';
    display: inline-block;
    width: 5px;
    height: 5px;
    background: var(--blue-500);
    border-radius: 50%;
    margin-left: 4px;
    vertical-align: middle;
}

.mobile-day-events {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-event-card {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--blue-500);
    cursor: pointer;
    transition: transform .1s, box-shadow .1s;
    position: relative;
}

.mobile-event-card:active {
    transform: scale(.98);
}

.mobile-event-time {
    font-size: 12px;
    font-weight: 600;
    color: var(--slate-600);
    display: flex;
    align-items: center;
    gap: 6px;
}

.mobile-event-duration {
    font-weight: 400;
    color: var(--slate-400);
    font-size: 11px;
}

.mobile-event-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--slate-800);
}

.mobile-event-location {
    font-size: 12px;
    color: var(--slate-500);
}

.mobile-event-sub {
    font-size: 11px;
    color: var(--slate-600);
    font-style: italic;
}

.mobile-event-type {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-top: 2px;
}

.mobile-event-card--sub {
    border-left-style: dashed;
}

.mobile-day-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--slate-400);
}

.mobile-day-empty-icon {
    font-size: 36px;
    display: block;
    margin-bottom: 12px;
}

.mobile-day-empty p {
    font-size: 14px;
    margin: 0;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .schedule-header      { flex-direction: column; }
    .slideover            { width: 100vw; }
    .event-detail-grid    { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    /* Hide desktop calendar, show mobile view */
    .desktop-only-calendar { display: none !important; }
    .mobile-schedule-view  { display: block; }

    /* Compact header nav */
    .schedule-header-actions { width: 100%; }
    .week-controls           { width: 100%; justify-content: space-between; }
    .week-nav                { flex: 1; justify-content: space-between; }

    .btn-week-nav-text {
        font-size: 0;       /* hide text */
        width: 36px;
        padding: 0;
        position: relative;
    }
    .btn-week-nav-text::before {
        font-size: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 100%;
    }
    /* First nav button = ← arrow, second = → arrow */
    .week-nav .btn-week-nav-text:first-child::before { content: '←'; }
    .week-nav .btn-week-nav-text:last-child::before  { content: '→'; }

    .week-picker-group { width: 100%; justify-content: flex-end; }
    .week-picker-input { flex: 1; max-width: 160px; }

    .btn-secondary { font-size: 12px; padding: 6px 12px; }

    /* Compact slideover */
    .slideover { width: 100vw; }
    .slideover-header { padding: 16px; }
    .slideover-body   { padding: 16px; }
}

@media (max-width: 600px) {
    .schedule-summary-bar { flex-direction: column; align-items: flex-start; }
    .schedule-legend      { gap: 10px; }
    .schedule-header-actions { gap: 8px; }
}

/* ── Substitute Coverage Styles ──────────────────────────────────────────── */
.cal-event-block.has-substitute {
    border-left-width: 4px;
    border-left-style: dashed;
    position: relative;
}

.cal-event-block.has-substitute::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        -45deg,
        transparent,
        transparent 3px,
        rgba(0, 0, 0, 0.03) 3px,
        rgba(0, 0, 0, 0.03) 6px
    );
    pointer-events: none;
    border-radius: inherit;
}

.substitute-indicator {
    margin-left: 4px;
    font-size: 10px;
}

.cal-event-substitute {
    font-size: 9px;
    color: var(--slate-600);
    font-style: italic;
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.slideover-substitute-alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: linear-gradient(135deg, #e0e7ff 0%, #dbeafe 100%);
    border: 1px solid #818cf8;
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 20px;
}

.slideover-substitute-icon {
    font-size: 20px;
}

.slideover-substitute-alert strong {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 2px;
}

.slideover-substitute-alert p {
    margin: 0;
    font-size: 12.5px;
    color: var(--slate-600);
}

/* ── Meeting Days Grid (Classes admin form) ─────────────────────────────── */
.meeting-days-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.meeting-day-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-sm);
    background: var(--white);
    cursor: pointer;
    transition: all .15s;
    font-size: 13px;
    color: var(--slate-700);
}

.meeting-day-checkbox:hover {
    background: var(--slate-50);
    border-color: var(--slate-300);
}

.meeting-day-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--blue-600);
    cursor: pointer;
}

.meeting-day-checkbox input[type="checkbox"]:checked + span {
    color: var(--blue-600);
    font-weight: 600;
}

.meeting-day-checkbox:has(input:checked) {
    border-color: var(--blue-400);
    background: var(--blue-50);
}