/* ==========================================================================
   GUtech Room Booking - the booking form and schedule (includes/frontend.php)
   Uses the theme's colours when present (--c-brand etc.), with fallbacks.
   ========================================================================== */

.glrb {
    --rb-brand: var(--c-brand, #0b4a7d);
    --rb-brand-dark: var(--c-brand-dark, #07355b);
    --rb-brand-soft: var(--c-brand-soft, #e6eef5);
    --rb-ink: var(--c-ink, #13212e);
    --rb-muted: var(--c-muted, #5b6874);
    --rb-line: var(--c-line, #dde3e8);
    --rb-soft: var(--c-soft, #f3f5f7);
    --rb-paper: var(--c-paper, #fff);
    --rb-accent: var(--c-accent, #d4a017);
    --rb-radius: var(--radius-lg, 10px);
    --rb-ok: #1d6b3a;
    --rb-error: #b3261e;
    min-width: 0;
    max-width: 100%;
    margin-block: 1.5rem;
}
.glrb *, .glrb *::before, .glrb *::after { box-sizing: border-box; }

/* Notices */
.glrb-preview {
    margin: 0 0 1.25rem;
    padding: .75rem 1rem;
    border: 1px dashed var(--rb-accent, #d4a017);
    border-radius: 8px;
    background: #fff8e6;
    color: #6b4e00;
    font-size: .92rem;
}
.glrb-note, .glrb-alert {
    margin: 0 0 1.25rem;
    padding: 1rem 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--rb-line);
    background: var(--rb-soft);
}
.glrb-note p:last-child { margin-bottom: 0; }
.glrb-alert--error { border-color: #f1c2bf; background: #fdeeed; color: #8a1c14; font-weight: 500; }
.glrb-alert--ok { border-color: #b9dcc6; background: #e8f3ec; color: var(--rb-ok); font-weight: 500; }
.glrb-field-error { margin: .4rem 0 0; color: var(--rb-error); font-size: .875rem; font-weight: 500; }

/* Form as a card with three steps */
.glrb-form {
    padding: clamp(1.25rem, 3vw, 2rem);
    border: 1px solid var(--rb-line);
    border-radius: var(--rb-radius);
    background: var(--rb-paper);
    box-shadow: 0 1px 2px rgba(19, 33, 46, .05), 0 2px 6px rgba(19, 33, 46, .04);
}
.glrb-step + .glrb-step { margin-top: 2rem; padding-top: 1.75rem; border-top: 1px solid var(--rb-line); }
.glrb-step__title {
    display: flex;
    align-items: center;
    gap: .65rem;
    margin: 0 0 1rem;
    color: var(--rb-ink);
    font-size: 1.1rem;
}
.glrb-step__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--rb-brand);
    color: #fff;
    font-size: .9rem;
}

/* 1. Days: a row of date tiles */
.glrb-days {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(4.75rem, 1fr);
    gap: .5rem;
    padding-bottom: .5rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    contain: inline-size; /* the row scrolls by itself instead of widening the page on phones */
}
.glrb-day {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .05rem;
    padding: .6rem .4rem .55rem;
    border: 1px solid var(--rb-line);
    border-radius: 8px;
    background: var(--rb-paper);
    color: var(--rb-ink);
    text-align: center;
    text-decoration: none;
    scroll-snap-align: start;
    transition: border-color .15s, box-shadow .15s;
}
.glrb-day:hover { border-color: var(--rb-brand); color: var(--rb-ink); }
.glrb-day__weekday { color: var(--rb-muted); font-size: .8rem; font-weight: 600; }
.glrb-day__date { font-size: 1.4rem; font-weight: 600; line-height: 1.2; }
.glrb-day__month { color: var(--rb-muted); font-size: .8rem; }
.glrb-day__free { margin-top: .25rem; color: var(--rb-ok); font-size: .75rem; font-weight: 600; }
.glrb-day.is-full .glrb-day__free { color: var(--rb-muted); }
.glrb-day.is-selected { border-color: var(--rb-brand); background: var(--rb-brand); color: #fff; box-shadow: 0 2px 8px rgba(11, 74, 125, .3); }
.glrb-day.is-selected .glrb-day__weekday,
.glrb-day.is-selected .glrb-day__month,
.glrb-day.is-selected .glrb-day__free { color: rgba(255, 255, 255, .85); }

/* 2. Rooms and slots */
.glrb-rooms { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 1rem; }
.glrb-room { margin: 0; padding: 1rem; border: 1px solid var(--rb-line); border-radius: var(--rb-radius); background: var(--rb-soft); }
.glrb-room__name { float: left; width: 100%; margin: 0 0 .75rem; padding: 0; color: var(--rb-ink); font-size: 1.05rem; font-weight: 600; }
.glrb-room__desc { clear: both; margin: 0 0 .75rem; color: var(--rb-muted); font-size: .9rem; }
.glrb-slots { clear: both; display: grid; gap: .5rem; }
.glrb-slot {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .7rem .9rem;
    border: 1px solid var(--rb-line);
    border-radius: 8px;
    background: var(--rb-paper);
    cursor: pointer;
    transition: border-color .15s, box-shadow .15s, background-color .15s;
}
.glrb-slot input { position: absolute; opacity: 0; pointer-events: none; }
.glrb-slot__time { color: var(--rb-ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.glrb-slot__state { font-size: .85rem; font-weight: 500; }
.glrb-slot.is-free .glrb-slot__state { color: var(--rb-ok); }
.glrb-slot.is-free:hover { border-color: var(--rb-brand); }
.glrb-slot.is-booked, .glrb-slot.is-past, .glrb-slot.is-closed { cursor: not-allowed; background: transparent; border-style: dashed; }
.glrb-slot.is-booked .glrb-slot__time, .glrb-slot.is-past .glrb-slot__time, .glrb-slot.is-closed .glrb-slot__time { color: var(--rb-muted); text-decoration: line-through; text-decoration-thickness: 1px; }
.glrb-slot.is-booked .glrb-slot__state, .glrb-slot.is-past .glrb-slot__state, .glrb-slot.is-closed .glrb-slot__state { color: var(--rb-muted); }
.glrb-slot:has(input:checked) { border-color: var(--rb-brand); background: var(--rb-brand-soft); box-shadow: 0 0 0 2px var(--rb-brand); }
.glrb-slot:has(input:checked) .glrb-slot__state { color: var(--rb-brand); }
.glrb-slot:has(input:focus-visible) { outline: 3px solid var(--rb-accent); outline-offset: 2px; }

/* 3. Group */
.glrb-fields { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 1rem; margin-bottom: 1.25rem; }
.glrb-field label { display: block; margin-bottom: .4rem; color: var(--rb-ink); font-size: .95rem; font-weight: 600; }
.glrb-help { margin: .35rem 0 0; color: var(--rb-muted); font-size: .85rem; }
.glrb input[type="text"], .glrb input[type="email"], .glrb select {
    width: 100%;
    min-height: 2.75rem;
    padding: .6rem .8rem;
    border: 1px solid #b9c3cc;
    border-radius: 8px;
    background: var(--rb-paper);
    color: var(--rb-ink);
    font: inherit;
}
.glrb input[readonly] { background: var(--rb-soft); color: var(--rb-muted); }
.glrb input:focus, .glrb select:focus { border-color: var(--rb-brand); outline: none; box-shadow: 0 0 0 3px rgba(11, 74, 125, .18); }

.glrb-members { display: grid; gap: .5rem; }
.glrb-members__head, .glrb-member { display: grid; grid-template-columns: 6rem minmax(0, 1fr) minmax(0, 2fr); gap: .5rem .75rem; align-items: center; }
.glrb-members__head { color: var(--rb-muted); font-size: .8rem; font-weight: 600; }
.glrb-member__label { color: var(--rb-ink); font-size: .9rem; font-weight: 600; }
.glrb-member .glrb-field-error { grid-column: 2 / -1; margin-top: 0; }
.glrb-member.has-error input { border-color: var(--rb-error); }

/* Submit */
.glrb-submit {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rb-line);
}
.glrb-summary { margin: 0; color: var(--rb-muted); }
.glrb-summary.is-set { color: var(--rb-ink); font-weight: 600; }
.glrb-summary.is-error { color: var(--rb-error); font-weight: 600; }
.glrb-submit__button { min-height: 3rem; padding-inline: 1.75rem; font-size: 1.02rem; }

/* Upcoming booking / cancel */
.glrb-upcoming {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
    padding: 1.1rem 1.25rem;
    border: 1px solid #b9cfe3;
    border-left: 4px solid var(--rb-brand);
    border-radius: 8px;
    background: var(--rb-brand-soft);
}
.glrb-upcoming p { margin: 0; }
.glrb-upcoming__label { color: var(--rb-brand); font-size: .85rem; font-weight: 600; }
.glrb-upcoming__what { color: var(--rb-ink); font-size: 1.1rem; font-weight: 600; }
.glrb-upcoming__note { margin-top: .25rem !important; color: var(--rb-muted); font-size: .9rem; }

/* Confirmation */
.glrb-done {
    max-width: 640px;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    border: 1px solid var(--rb-line);
    border-radius: var(--rb-radius);
    background: var(--rb-paper);
    box-shadow: 0 2px 4px rgba(19, 33, 46, .06), 0 14px 32px rgba(19, 33, 46, .1);
    text-align: center;
}
.glrb-done__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: #e8f3ec;
    color: var(--rb-ok);
}
.glrb-done__title { margin: 0 0 1.25rem; font-size: 1.5rem; }
.glrb-done__details { display: grid; gap: .4rem; margin: 0 auto 1.25rem; padding: 1rem 1.25rem; border-radius: 8px; background: var(--rb-soft); text-align: left; }
.glrb-done__details div { display: grid; grid-template-columns: 5rem minmax(0, 1fr); gap: 1rem; }
.glrb-done__details dt { color: var(--rb-muted); }
.glrb-done__details dd { margin: 0; color: var(--rb-ink); font-weight: 600; }
.glrb-done__text { color: var(--rb-muted); }
.glrb-done__redirect { color: var(--rb-ink); font-weight: 500; }
.glrb-done__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin: 1rem 0 0; }

/* Read-only schedule */
.glrb-schedule { margin-block: 1.5rem 2rem; }
.glrb-schedule__title { margin-bottom: .75rem; }
.glrb-schedule__scroll { overflow-x: auto; contain: inline-size; border: 1px solid var(--rb-line, #dde3e8); border-radius: 10px; }
.glrb-schedule table { width: 100%; margin: 0; border-collapse: collapse; font-size: .9rem; }
.glrb-schedule th, .glrb-schedule td { padding: .55rem .75rem; border-bottom: 1px solid var(--rb-line, #dde3e8); text-align: center; white-space: nowrap; }
.glrb-schedule thead th { background: var(--rb-soft, #f3f5f7); }
.glrb-schedule tbody th { text-align: left; font-variant-numeric: tabular-nums; }
.glrb-schedule td.is-free { color: #1d6b3a; font-weight: 600; }
.glrb-schedule td.is-booked { background: #fdeeed; color: #8a1c14; }
.glrb-schedule td.is-past, .glrb-schedule td.is-closed { color: #9aa5af; }

@media (max-width: 640px) {
    .glrb-form { padding: 1.1rem; }
    .glrb-step__title { font-size: 1.02rem; }
    .glrb-days { grid-auto-columns: 4.4rem; margin-inline: -.25rem; padding-inline: .25rem; }
    .glrb-room { padding: .85rem; }
    .glrb-slot { padding: .75rem .8rem; }
    .glrb-upcoming > div, .glrb-upcoming form { width: 100%; }
    .glrb-upcoming .button { width: 100%; justify-content: center; }
    .glrb-done__details div { grid-template-columns: 4.5rem minmax(0, 1fr); gap: .75rem; }
    .glrb-fields { grid-template-columns: 1fr; }
    .glrb-members__head { display: none; }
    .glrb-member { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); }
    .glrb-member__label { grid-column: 1 / -1; }
    .glrb-member .glrb-field-error { grid-column: 1 / -1; }
    .glrb-submit__button { width: 100%; justify-content: center; }
}
@media (max-width: 420px) {
    .glrb-member { grid-template-columns: minmax(0, 1fr); gap: .4rem; padding-bottom: .5rem; border-bottom: 1px solid var(--rb-line); }
}
@media (prefers-reduced-motion: reduce) {
    .glrb * { transition: none !important; }
}