/* ==========================================================================
   Front page

   A signpost, not a dashboard: the readings are one click away and this page
   exists only to point at them. Same tokens and same card shape as the weather
   page, so arriving there is not a change of scenery.
   ========================================================================== */

:root {
    --page: #ffffff;
    --surface: #f8f9fa;
    --ink: #16202b;
    --ink-muted: #5b6672;
    --rule: #dee2e6;
    --accent: #1668b0;

    --gutter: clamp(1rem, 4vw, 2.5rem);
    --max: 1080px;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--page);
    color: var(--ink);
    font-size: 17px;
    line-height: 1.5;
}

main { flex: 1 1 auto; }

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

:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* --- Hero ----------------------------------------------------------------- */

.hero {
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(3rem, 9vw, 5rem) var(--gutter) clamp(1.5rem, 5vw, 3rem);
    text-align: center;
}

.hero-icon {
    display: block;
    margin: 0 auto 1rem;
    font-size: 4rem;
    line-height: 1;
    color: var(--ink);
}

.hero h1 {
    margin: 0;
    font-size: clamp(2rem, 6vw, 3.25rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -.02em;
}

.hero p {
    margin: .75rem 0 0;
    font-size: clamp(1rem, 2.5vw, 1.15rem);
    color: var(--ink-muted);
}

/* --- Sites ---------------------------------------------------------------- */

#sites {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 var(--gutter) clamp(2rem, 6vw, 4rem);
}

.site + .site { margin-top: 2.5rem; }

/* One site needs no heading to tell it apart from the others; more than one
   does. Hidden rather than dropped, so the cards stay in a labelled group for
   anyone reading the page aloud. */
.site-name {
    margin: 0 0 1rem;
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: .02em;
}

#sites .site:only-child .site-name {
    position: absolute;
    width: 1px; height: 1px;
    margin: -1px; padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.card {
    display: block;
    padding: 2rem 1.5rem;
    border: 1px solid var(--rule);
    border-radius: .75rem;
    background: var(--surface);
    color: var(--ink);
    text-decoration: none;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .08);
}

.card-icon {
    display: block;
    margin-bottom: 1rem;
    font-size: 3rem;
    line-height: 1;
}

.card-title {
    margin: 0 0 .5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.card-text {
    margin: 0;
    font-size: .9375rem;
    color: var(--ink-muted);
}

.empty {
    margin: 0;
    padding: 2rem 0;
    text-align: center;
    color: var(--ink-muted);
}

/* --- Footer --------------------------------------------------------------- */

footer {
    padding: 2rem var(--gutter);
    border-top: 1px solid var(--rule);
    text-align: center;
    font-size: .8rem;
    color: var(--ink-muted);
}

footer p { margin: 0 0 .25rem; }

footer p:last-child { margin-bottom: 0; }

footer a { color: var(--ink-muted); text-decoration: none; }

footer a:hover { text-decoration: underline; }