/* WATcalendars - one page, one job: find a group, subscribe to it.
   Mobile-first; every width below is a min-width. */

:root {
    --bg: #ffffff;
    --surface: #f4f5f7;
    --surface-2: #e9ebef;
    --text: #15171c;
    --text-dim: #5b6270;
    --line: #d8dbe2;
    --accent: #0a5c42;
    --accent-text: #ffffff;
    --focus: #0a5c42;
    --radius: 12px;
    --font-display: "Chakra Petch", system-ui, sans-serif;
    --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
    .chip-logo, .result-logo, .sheet-logo {
        background: rgb(255 255 255 / 0.92);
        border-radius: 6px;
        padding: 2px;
    }
    .brand-logo { filter: none; }
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f1115;
        --surface: #171a21;
        --surface-2: #1f232c;
        --text: #e8eaee;
        --text-dim: #969db0;
        --line: #2a2f3a;
        --accent: #2e9e75;
        --accent-text: #0f1115;
        --focus: #3faa82;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.5;
    padding: 0 16px env(safe-area-inset-bottom, 0px);
    -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); }

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
    border-radius: 4px;
}

.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- masthead ---------- */

.masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 680px;
    margin: 0 auto;
    padding: 20px 0 8px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
    text-decoration: none;
    color: var(--text);
}

.brand-mark { color: var(--accent); }

.brand-logo {
    width: 26px;
    height: auto;
    display: block;
}

.ghost-link {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-decoration: none;
}
.ghost-link:hover { color: var(--text); }

/* ---------- hero + search ---------- */

main { max-width: 680px; margin: 0 auto; }

.hero { padding: 24px 0 8px; }

h1 {
    font-family: var(--font-display);
    font-size: 1.65rem;
    line-height: 1.2;
    margin: 0 0 8px;
}

.lede {
    margin: 0 0 20px;
    color: var(--text-dim);
    font-size: 1rem;
}

.search-wrap { position: relative; }

.search {
    width: 100%;
    padding: 15px 44px 15px 16px;
    font-family: var(--font-mono);
    font-size: 1rem;          /* 16px keeps iOS from zooming on focus */
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    appearance: none;
}
.search::placeholder { color: var(--text-dim); font-family: var(--font-body); }
.search:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px rgb(10 92 66 / 0.22); }
.search::-webkit-search-cancel-button { display: none; }

.clear {
    position: absolute;
    right: 6px; top: 50%;
    transform: translateY(-50%);
    width: 34px; height: 34px;
    font-size: 1.4rem; line-height: 1;
    color: var(--text-dim);
    background: none; border: 0; border-radius: 8px;
    cursor: pointer;
}
.clear:hover { color: var(--text); background: var(--surface-2); }

.hint { margin: 10px 2px 0; font-size: 0.85rem; color: var(--text-dim); }

/* ---------- faculty chips ---------- */

.faculties {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin: 18px 0 4px;
}

.chip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 4px 10px;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    cursor: pointer;
    font: inherit;
    transition: border-color 0.12s, background 0.12s;
}
.chip:hover { background: var(--surface-2); border-color: var(--accent); }

.chip-logo {
    width: 34px;
    height: 34px;
    object-fit: contain;
    /* The faculty crests are dark line art - lift them out of a dark
       background without washing out the light theme. */
    filter: none;
}

.chip-code {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.03em;
}

.chip-count { font-size: 0.68rem; color: var(--text-dim); }

.chip[aria-pressed="true"] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-text);
}
.chip[aria-pressed="true"] .chip-count { color: inherit; opacity: 0.8; }
.chip[aria-pressed="true"] .chip-logo {
    background: rgb(255 255 255 / 0.9);
    border-radius: 6px;
    padding: 2px;
}

/* ---------- results ---------- */

.status { margin: 16px 2px 2px; font-size: 0.85rem; color: var(--text-dim); min-height: 1.2em; }

.results { list-style: none; margin: 0 0 32px; padding: 0; }

.result {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 13px 14px;
    margin-bottom: 8px;
    text-align: left;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    cursor: pointer;
    font: inherit;
}
.result:hover, .result.active { border-color: var(--accent); background: var(--surface-2); }

.result-id {
    flex: 1;
    min-width: 0;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    /* Group names run to 80+ characters at WIM - never let one push the
       page sideways. The full name lives in the title attribute. */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-logo {
    flex: none;
    width: 26px;
    height: 26px;
    object-fit: contain;
}

.result-events { flex: none; font-size: 0.78rem; color: var(--text-dim); }

.pager {
    /* Arrows sit flush with the result cards and the range label centres
       between them, so the row lines up with the list instead of
       floating in the middle of it. */
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 10px 0 14px;
}

.pager-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: none;
    width: 44px;
    height: 44px;
    padding: 0;
    font: inherit;
    font-size: 1rem;
    line-height: 1;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    cursor: pointer;
}
.pager-btn:hover:not(:disabled) { border-color: var(--accent); background: var(--surface-2); }
.pager-btn:disabled { opacity: 0.3; cursor: default; }

.pager-label {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
    white-space: nowrap;
}

.empty { padding: 24px 2px; color: var(--text-dim); }

/* ---------- subscription sheet ---------- */

/* The hidden attribute must win over display:flex below, or the
   invisible overlay keeps swallowing clicks on the whole page. */
[hidden] { display: none !important; }

.sheet {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    background: rgb(0 0 0 / 0.45);
    padding: 0;
}

.sheet-inner {
    position: relative;
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 24px 20px calc(24px + env(safe-area-inset-bottom, 0px));
    background: var(--bg);
    border-radius: 18px 18px 0 0;
    border-top: 1px solid var(--line);
}

.sheet-actions {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 6px;
}

.sheet-source {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    color: var(--text-dim);
    background: var(--surface);
    border-radius: 10px;
    text-decoration: none;
}
.sheet-source:hover { color: var(--accent); background: var(--surface-2); }

.sheet-close {
    width: 36px; height: 36px;
    font-size: 1.6rem; line-height: 1;
    color: var(--text-dim);
    background: var(--surface); border: 0; border-radius: 10px;
    cursor: pointer;
}
.sheet-close:hover { color: var(--text); }

.sheet-head {
    display: flex;
    align-items: center;
    gap: 13px;
    margin-bottom: 6px;
    /* Clears both corner buttons (source link + close), not just one. */
    padding-right: 84px;
    min-height: 44px;
}

.sheet-logo {
    flex: none;
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.sheet-head-text { min-width: 0; }

.sheet-faculty {
    margin: 0 0 4px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
}

.sheet-title {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 500;
    /* Long WIM names must wrap here rather than overflow. */
    overflow-wrap: anywhere;
}

.sheet-meta { margin: 0 0 20px; font-size: 0.85rem; color: var(--text-dim); }

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 10px;
    font: inherit;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius);
    cursor: pointer;
}

.btn-primary { background: var(--accent); color: var(--accent-text); border: 1px solid var(--accent); }
.btn-primary:hover { filter: brightness(1.08); }

.btn-ghost {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--line);
    font-weight: 500;
}
.btn-ghost:hover { background: var(--surface-2); }

.btn-icon {
    display: inline-flex;
    align-items: center;
    flex: none;
}
.btn-icon svg, .btn-icon img { display: block; }

.btn-note { margin: 0 0 18px; font-size: 0.82rem; color: var(--text-dim); text-align: center; }

.more { border-top: 1px solid var(--line); padding-top: 14px; }
.more summary { cursor: pointer; font-size: 0.9rem; color: var(--text-dim); }
.more summary:hover { color: var(--text); }
.more-body { padding-top: 14px; }

.copy-label { display: block; margin: 16px 0 6px; font-size: 0.8rem; color: var(--text-dim); }
.copy-row { display: flex; gap: 8px; }

.copy-input {
    flex: 1;
    min-width: 0;
    padding: 10px 12px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 10px;
}

.copy-btn {
    flex: none;
    padding: 10px 14px;
    font: inherit;
    font-size: 0.85rem;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: 10px;
    cursor: pointer;
}
.copy-btn:hover { border-color: var(--accent); }

/* ---------- misc ---------- */

.noscript, .error-box {
    padding: 16px;
    margin: 16px 0;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.footer {
    max-width: 680px;
    margin: 0 auto;
    padding: 28px 0 36px;
    border-top: 1px solid var(--line);
    font-size: 0.82rem;
    color: var(--text-dim);
}
.footer p { margin: 0 0 6px; }

.footer-status { display: flex; align-items: center; gap: 8px; }

.dot {
    /* An <a> is inline by default, so width/height would be ignored. */
    display: inline-block;
    flex: none;
    position: relative;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--dot, var(--text-dim));
    text-decoration: none;
}

/* The halo is a separate ring so the dot itself stays crisp. */
.dot::after {
    content: "";
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 1px solid var(--dot, var(--text-dim));
    opacity: 0;
}

.dot.ok      { --dot: #2ea043; }
.dot.failed  { --dot: #e5534b; }

@media (prefers-reduced-motion: no-preference) {
    .dot::after { animation: ping 2.4s cubic-bezier(0, 0, 0.2, 1) infinite; }
    @keyframes ping {
        0%   { transform: scale(0.8); opacity: 0.9; }
        70%  { transform: scale(2.1); opacity: 0; }
        100% { transform: scale(2.1); opacity: 0; }
    }
}

.copyright {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    font-size: 0.78rem;
    opacity: 0.85;
}

@media (min-width: 620px) {
    body { padding: 0 24px; }
    .faculties { grid-template-columns: repeat(8, 1fr); }
    h1 { font-size: 2.1rem; }
    .hero { padding: 40px 0 8px; }
    .sheet { align-items: center; padding: 24px; }
    .sheet-inner { border-radius: 18px; border: 1px solid var(--line); }
}

@media (prefers-reduced-motion: no-preference) {
    .sheet-inner { animation: rise 0.18s ease-out; }
    @keyframes rise { from { transform: translateY(12px); opacity: 0; } }
}