/* ─── AVAILABILITY VIEW ───────────────────────────────────────
   Week grid the user paints in green / yellow / red, with a calendar mode
   that overlays scheduled events on the same surface. All colors flow from
   theme-variables.css so light/dark mode work without overrides.
*/

.avail-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.25rem 4rem;
}

.avail-page-desc {
    color: var(--slate);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0 0 1rem;
    max-width: 760px;
}

.avail-empty {
    color: var(--slate);
    padding: 2rem;
    text-align: center;
}

/* ─── Time-zone prompt ─────────────────────────────────────── */

.avail-tz-prompt {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.8rem;
    background: var(--color-warning-light);
    color: var(--color-warning-text);
    border: 1px solid var(--color-warning-border);
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.avail-tz-prompt strong { font-weight: 600; }

/* ─── Mode bar (Paint / Calendar tabs) ─────────────────────── */

.avail-mode-bar {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.avail-mode-tabs {
    display: inline-flex;
    border: 1px solid var(--primary-tint-md, var(--primary-tint-sm));
    background: var(--bg-panel);
    border-radius: 10px;
    padding: 3px;
    gap: 2px;
}

.avail-mode-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--slate);
    background: transparent;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    transition: background 120ms ease, color 120ms ease;
}

.avail-mode-tab:hover {
    color: var(--charcoal);
    background: var(--primary-tint-xs);
}

.avail-mode-tab.active {
    background: var(--bg-elevated);
    color: var(--green);
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.avail-mode-icon {
    display: inline-flex;
    width: 16px;
    height: 16px;
}

.avail-mode-icon svg {
    width: 100%;
    height: 100%;
    color: currentColor;
}

/* ─── Toolbar (paint chips, granularity, custom-week, submit) */

.avail-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    background: var(--bg-panel);
    border: 1px solid var(--primary-tint-xs);
    border-radius: 10px;
    margin-bottom: 0.75rem;
}

.avail-toolbar-group {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.avail-toolbar-trailing {
    margin-left: auto;
}

.avail-toolbar-label {
    color: var(--slate);
    font-size: 0.88rem;
    margin-right: 0.25rem;
}

.avail-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    border: 1px solid var(--primary-tint-sm, transparent);
    background: var(--bg-elevated);
    color: var(--charcoal);
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 80ms ease, box-shadow 120ms ease;
}

.avail-chip:hover { transform: translateY(-1px); }

.avail-chip.active {
    box-shadow: 0 0 0 2px var(--green) inset;
}

.avail-chip-swatch {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.08);
    display: inline-block;
}

.avail-chip-g .avail-chip-swatch { background: var(--color-success); }
.avail-chip-y .avail-chip-swatch { background: var(--color-warning); }
.avail-chip-r .avail-chip-swatch { background: var(--color-danger); }
.avail-chip-erase .avail-chip-swatch {
    background: transparent;
    border: 1px dashed var(--slate);
}

.avail-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: var(--bg-elevated);
    color: var(--charcoal);
    border: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 120ms ease, transform 80ms ease;
}

.avail-btn:hover { background: var(--primary-tint-xs); }

.avail-btn-primary {
    background: var(--green);
    color: var(--on-brand, #fff);
    border-color: var(--green);
}

.avail-btn-primary:hover {
    background: var(--green);
    filter: brightness(0.95);
}

.avail-btn-pill {
    padding: 0.3rem 0.7rem;
    background: var(--bg-elevated);
    color: var(--slate);
    border: 1px solid var(--primary-tint-sm, transparent);
    border-radius: 999px;
    font-size: 0.85rem;
    cursor: pointer;
}

.avail-btn-pill.active {
    background: var(--green);
    color: var(--on-brand, #fff);
    border-color: var(--green);
}

.avail-week-mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    background: var(--bg-elevated);
    color: var(--charcoal);
    border: 1px dashed var(--slate);
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
}

.avail-week-mode-btn.active {
    background: var(--primary-tint-xs);
    border-style: solid;
    border-color: var(--green);
    color: var(--green);
}

/* ─── Week stepper ─────────────────────────────────────────── */

.avail-stepper {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.25rem;
    margin-bottom: 0.5rem;
}

.avail-step-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-elevated);
    color: var(--charcoal);
    border: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-radius: 8px;
    cursor: pointer;
}

.avail-step-btn:hover { background: var(--primary-tint-xs); }

.avail-step-label {
    flex: 1;
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.avail-step-label strong {
    color: var(--charcoal);
    font-size: 1.05rem;
    font-weight: 600;
}

.avail-step-meta {
    color: var(--slate);
    font-size: 0.8rem;
}

/* ─── Grid ─────────────────────────────────────────────────── */

.avail-grid-wrap {
    overflow-x: auto;
    border: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-radius: 10px;
    background: var(--bg-elevated);
    user-select: none;
    -webkit-user-select: none;
}

.avail-grid {
    display: grid;
    grid-template-columns: 80px repeat(7, minmax(72px, 1fr));
    grid-auto-rows: 18px;
    position: relative;
    min-width: 600px;
}

.avail-grid[data-rows="24"] {
    grid-auto-rows: 30px;
}

.avail-corner {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-right: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    position: sticky;
    top: 0;
    left: 0;
    z-index: 3;
}

.avail-day-header {
    background: var(--bg-panel);
    color: var(--charcoal);
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-bottom: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-right: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    cursor: pointer;
    padding: 0.4rem 0.2rem;
    position: sticky;
    top: 0;
    z-index: 2;
}

.avail-day-header:hover {
    background: var(--primary-tint-xs);
}

.avail-time-header {
    background: var(--bg-panel);
    color: var(--slate);
    font-size: 0.72rem;
    text-align: right;
    padding: 0 0.4rem;
    border: none;
    border-right: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-bottom: 1px dashed transparent;
    cursor: pointer;
    position: sticky;
    left: 0;
    z-index: 1;
    line-height: 1.1;
}

.avail-time-header:hover {
    background: var(--primary-tint-xs);
    color: var(--charcoal);
}

/* Subtle row separator every 2 hours so the eye can find 9am, 12pm, etc. */
.avail-grid .avail-time-header:nth-of-type(8n + 1) {
    border-bottom: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
}

.avail-cell {
    border-right: 1px solid var(--primary-tint-xs);
    border-bottom: 1px solid var(--primary-tint-xs);
}

.avail-paint-cell {
    cursor: pointer;
    transition: background 90ms ease, opacity 120ms ease;
}

.avail-paint-cell:hover {
    box-shadow: inset 0 0 0 1px var(--green);
}

/* Cell color states. The unset state is intentionally subtle so a freshly
   painted week does not feel punishing or loud. */
.avail-c-unset { background: var(--primary-tint-xs); }
.avail-c-g     { background: var(--color-success); }
.avail-c-y     { background: var(--color-warning); }
.avail-c-r     { background: var(--color-danger); }
.avail-c-mixed {
    background: linear-gradient(135deg, var(--color-success) 0 50%, var(--color-warning) 50% 100%);
}

/* After "I'm done", unset cells render with a faint diagonal stripe so the
   user (and any aggregator) can tell unmarked-after-submit from unmarked-
   in-progress. The underlying value stays null. */
.avail-grid--submitted .avail-c-unset {
    background:
        repeating-linear-gradient(
            45deg,
            var(--primary-tint-xs) 0 6px,
            color-mix(in srgb, var(--color-danger) 12%, transparent) 6px 12px
        );
}

/* ─── Calendar mode overlay ────────────────────────────────── */

.avail-grid--calendar .avail-paint-cell {
    opacity: 0.35;
    pointer-events: none;
}

.avail-grid--calendar .avail-day-header,
.avail-grid--calendar .avail-time-header {
    pointer-events: none;
}

.avail-events-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

.avail-events-loading,
.avail-events-empty {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--slate);
    font-size: 0.9rem;
    background: var(--bg-elevated);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    pointer-events: auto;
}

.avail-event {
    position: absolute;
    border-radius: 6px;
    padding: 0.25rem 0.4rem;
    color: var(--on-brand, #fff);
    font-size: 0.78rem;
    line-height: 1.15;
    overflow: hidden;
    pointer-events: auto;
    box-shadow: 0 1px 3px rgba(0,0,0,0.18);
    cursor: default;
    box-sizing: border-box;
}

.avail-event-title {
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

.avail-event-time {
    opacity: 0.85;
    font-size: 0.72rem;
}

.avail-event-workshop     { background: var(--violet); }
.avail-event-cohort       { background: var(--green); }
.avail-event-class        { background: var(--rose); }
.avail-event-training     { background: var(--gamboge); }
.avail-event-office_hours { background: var(--primary); }
.avail-event-other        { background: var(--slate); }

/* Inline swatches in legend share the same color rules. */
.avail-swatch.avail-event-workshop     { background: var(--violet); }
.avail-swatch.avail-event-cohort       { background: var(--green); }
.avail-swatch.avail-event-class        { background: var(--rose); }
.avail-swatch.avail-event-training     { background: var(--gamboge); }
.avail-swatch.avail-event-office_hours { background: var(--primary); }
.avail-swatch.avail-event-other        { background: var(--slate); }

/* ─── Legend ──────────────────────────────────────────────── */

.avail-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin-top: 0.75rem;
    padding: 0.6rem 0.75rem;
    background: var(--bg-panel);
    border: 1px solid var(--primary-tint-xs);
    border-radius: 10px;
    font-size: 0.85rem;
    color: var(--charcoal);
}

.avail-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.avail-swatch {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.08);
}

.avail-legend-tz {
    margin-left: auto;
    color: var(--slate);
}

/* ─── Admin event form ────────────────────────────────────── */

.avail-event-form {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-panel);
    border: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-radius: 10px;
}

.avail-event-form h3 {
    margin: 0 0 0.25rem;
    font-size: 1rem;
    color: var(--charcoal);
}

.avail-event-form-hint {
    margin: 0 0 0.75rem;
    color: var(--slate);
    font-size: 0.85rem;
}

.avail-event-form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.6rem;
}

.avail-event-form-row label {
    flex: 1 1 160px;
    display: flex;
    flex-direction: column;
    color: var(--slate);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    gap: 0.25rem;
}

.avail-event-form-row label.avail-event-form-row-full {
    flex: 1 1 100%;
}

.avail-event-form-row input,
.avail-event-form-row select,
.avail-event-form-row textarea {
    padding: 0.45rem 0.55rem;
    background: var(--bg-elevated);
    color: var(--charcoal);
    border: 1px solid var(--primary-tint-sm, var(--primary-tint-xs));
    border-radius: 6px;
    font-size: 0.92rem;
    font-family: inherit;
    text-transform: none;
    letter-spacing: normal;
}

.avail-event-form-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 0.75rem;
}

/* ─── Mobile ───────────────────────────────────────────────── */

@media (max-width: 600px) {
    .avail-container {
        padding: 0.75rem 0.5rem 4rem;
    }
    .avail-toolbar {
        gap: 0.5rem;
        padding: 0.5rem;
    }
    .avail-toolbar-trailing {
        margin-left: 0;
    }
    .avail-grid {
        min-width: 560px;
    }
    .avail-grid-wrap {
        /* Surface the horizontal scroll affordance on small screens. */
        scroll-snap-type: x proximity;
    }
    .avail-legend-tz {
        margin-left: 0;
        flex-basis: 100%;
    }
}