/* availability.css
   The fiber address check, shared by the homepage hero and the
   /fiber-availability page so both are the same tool. The lookup itself is
   js/availability.js (loaded through main.js on every page); it activates
   wherever an .availability-form is present. */

.availability-section {
    position: relative;
    z-index: 1;
    padding: var(--section-y) 0;
    background: var(--blue);
    color: var(--card);
    scroll-margin-top: 100px;
}
.availability-heading {
    max-width: 22ch;
    color: var(--card);
    font-size: clamp(1.75rem, 3.4vw, 2.7rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -.02em;
}
/* Second sentence stays solid white and steps down in weight instead of
   colour; a little air above it is the only separator. */
.availability-heading span { display: block; margin-top: .3em; font-weight: 500; }

/* Address check — the lead action, stretched to be the widest thing here */
.hero-availability { margin-top: clamp(24px, 3.5vw, 34px); max-width: min(920px, 100%); }
.availability-label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--font-heading);
    font-size: .8rem;
    font-weight: 700;
    color: var(--on-dark);
}
.availability-field {
    display: flex;
    gap: 6px;
    padding: 6px;
    background: var(--card);
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-sm);
    transition: box-shadow .18s ease;
}
/* A blue focus ring would vanish on the blue band; go dark-on-white instead. */
.availability-field:focus-within { box-shadow: 0 0 0 3px var(--card), 0 0 0 6px var(--ink); }
.availability-input {
    flex: 1;
    min-width: 0;
    padding: 0 8px 0 16px;
    border: 0;
    background: none;
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1rem;
}
.availability-input:focus { outline: none; }
.availability-input::placeholder { color: var(--ink-soft); }
.availability-submit {
    flex: none;
    min-height: 48px;
    padding: 0 24px;
    border: 0;
    border-radius: var(--radius-pill);
    background: var(--ink);
    color: var(--paper);
    font-family: var(--font-heading);
    font-size: .82rem;
    font-weight: 700;
    cursor: pointer;
    transition: background .18s ease;
}
.availability-submit::after { content: '\203A'; margin-left: 8px; }
.availability-submit:hover { background: var(--blue); }

/* Error sits above the field (GOV.UK pattern). Red text fails on the blue
   band, so it's white and bold with a white rule marking it instead. */
.availability-error {
    margin-bottom: 10px;
    padding-left: 12px;
    border-left: 4px solid var(--card);
    color: var(--card);
    font-weight: 700;
}

/* Suggestions drop below the field as a plain white list — the one place a
   dropdown shadow is allowed. */
.availability-form { position: relative; }
.availability-suggest {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 5;
    overflow: hidden;
    background: var(--card);
    border: 1px solid var(--rule);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}
.availability-suggest[hidden] { display: none; }
.availability-suggestions { margin: 0; padding: 0; list-style: none; }
.availability-suggestion {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 10px 18px;
    border-bottom: 1px solid var(--rule);
    color: var(--ink);
    cursor: pointer;
    transition: background-color .15s ease;
}
.availability-suggestion:hover,
.availability-suggestion[aria-selected="true"] { background: var(--surface); }
.availability-suggestion[aria-selected="true"] { box-shadow: inset 4px 0 0 var(--blue); }
/* Loading rows: same height as a real suggestion so nothing shifts when
   results replace them. A slow opacity pulse, not a sweeping shimmer. */
.availability-suggestion--loading { cursor: default; }
.availability-suggestion--loading:hover { background: none; }
.availability-skeleton {
    display: block;
    height: 12px;
    border-radius: var(--radius-sm);
    background: var(--paper);
    animation: availability-pulse 1.2s ease-in-out infinite;
}
.availability-suggestion--loading:nth-child(2) .availability-skeleton { animation-delay: .15s; }
.availability-suggestion--loading:nth-child(3) .availability-skeleton { animation-delay: .3s; }
@keyframes availability-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .45; }
}
.availability-attribution { padding: 8px 18px; color: var(--ink-soft); font-size: .75rem; }

@media (prefers-reduced-motion: reduce) {
    .availability-suggestion { transition: none; }
    .availability-skeleton { animation: none; opacity: .7; }
}

@media (max-width: 440px) {
    .availability-field { flex-direction: column; border-radius: var(--radius-lg); }
    .availability-input { padding: 12px 14px; }
    .availability-submit { width: 100%; }
}

/* --- /fiber-availability page hero --------------------------------------- */
.fa-hero .availability-heading { max-width: 20ch; font-size: clamp(2.2rem, 5vw, 3.8rem); }
.fa-hero .hero-availability { max-width: 760px; }
.fa-hero-note { margin-top: 20px; color: var(--on-dark); font-size: .95rem; }
.fa-hero-note a { color: var(--card); font-weight: 600; }
.fa-hero a:focus-visible { outline-color: var(--card); }