/* Landing page only (templates/index.html). Builds on app.css tokens. */

/* Hero */
.gf-hero {
    position: relative;
    padding: 5rem 0 var(--gf-section-y);
    overflow: hidden;
    isolation: isolate;
}
.gf-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(to right, var(--gf-border) 1px, transparent 1px),
        linear-gradient(to bottom, var(--gf-border) 1px, transparent 1px);
    background-size: 44px 44px;
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
    opacity: 0.7;
}
.gf-hero-title {
    font-size: clamp(2.2rem, 1.4rem + 3vw, 3.4rem);
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}
.gf-hero-lead { max-width: 36rem; }
.gf-hero-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin: 2rem 0 0;
    padding: 0;
    list-style: none;
    color: var(--gf-muted);
    font-size: 0.95rem;
}
.gf-hero-facts li { display: inline-flex; align-items: center; gap: 0.5rem; }
.gf-hero-facts i { color: var(--gf-subtle); }

/* Demo card */
.gf-demo { padding: 2rem; box-shadow: var(--gf-shadow-lg); height: auto; }
.gf-demo .input-group-text {
    background: var(--gf-surface-3);
    border-color: var(--gf-border-strong);
    color: var(--gf-muted);
    font-size: 0.85rem;
}
.gf-demo .form-control { font-family: var(--gf-mono); font-size: 0.95rem; }
.gf-demo .form-control.is-invalid { border-color: var(--gf-danger); }
.gf-demo-error {
    margin-top: 0.75rem;
    padding: 0.6rem 0.85rem;
    border-radius: var(--gf-radius-sm);
    background: rgba(185, 28, 28, 0.08);
    color: var(--gf-danger);
    font-size: 0.9rem;
}
.gf-demo-result {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gf-border);
}
.gf-demo-result[aria-busy="true"] { opacity: 0.55; }
.gf-demo-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin: 0 0 1.25rem;
}
.gf-demo-stats > div {
    padding: 0.75rem;
    border: 1px solid var(--gf-border);
    border-radius: var(--gf-radius-sm);
    background: var(--gf-surface-2);
    text-align: center;
}
.gf-demo-stats dt { font-size: 0.75rem; font-weight: 500; color: var(--gf-muted); }
.gf-demo-stats dd { margin: 0.15rem 0 0; font-size: 1.2rem; font-weight: 700; color: var(--gf-ink); font-variant-numeric: tabular-nums; }
.gf-demo-subtitle {
    margin-bottom: 0.6rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gf-muted);
}

/* Steps list keeps equal-height cards inside <li> */
#how li > .gf-card { height: 100%; }

@media (max-width: 991.98px) {
    .gf-hero { padding-top: 3rem; }
}
@media (max-width: 575.98px) {
    .gf-demo { padding: 1.35rem; }
    .gf-demo .input-group-text { display: none; }
    .gf-demo .input-group > .form-control { border-top-left-radius: var(--gf-radius-sm); border-bottom-left-radius: var(--gf-radius-sm); }
    .gf-demo-stats { gap: 0.5rem; }
    .gf-demo-stats dd { font-size: 1.05rem; }
}