/**
 * HTMB Forge Hero — la parola fatta di pixel.
 * I colori arrivano dalla palette del tema (--htmb-hero-*), con fallback.
 * Spec: docs/superpowers/specs/2026-09-24-hero-forge-design.md
 */

.htm-forge-hero {
    --forge-fondo: var(--htmb-hero-fondo, #06080c);
    --forge-c1: var(--htmb-hero-colore-1, #2563eb);
    --forge-c2: var(--htmb-hero-colore-2, #38bdf8);

    position: absolute;
    inset: 0;
    min-height: 100vh;
    min-height: 100svh;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 90px 16px 80px;
    overflow: hidden;
    isolation: isolate;
    color: #ffffff;
    background:
        radial-gradient(60% 50% at 50% 46%, color-mix(in srgb, var(--forge-c1) 16%, transparent), transparent 70%),
        radial-gradient(45% 40% at 85% 100%, color-mix(in srgb, var(--forge-c2) 12%, transparent), transparent 70%),
        linear-gradient(160deg, var(--forge-fondo) 0%, color-mix(in srgb, var(--forge-fondo) 82%, var(--forge-c1)) 100%);
}

/* Griglia da display: la superficie a pixel su cui si compone la parola.
   Il passo lo imposta il JS (4 volte il passo dei pixel). Voluta da Daniele. */
.htm-forge-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: var(--forge-grid, 24px) var(--forge-grid, 24px);
    background-position: center;
    -webkit-mask-image: radial-gradient(70% 60% at 50% 45%, #000 20%, transparent 80%);
    mask-image: radial-gradient(70% 60% at 50% 45%, #000 20%, transparent 80%);
}

/* Grana leggera */
.htm-forge-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.06;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/></filter><rect width='120' height='120' filter='url(%23n)'/></svg>");
}

.htm-forge-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    cursor: pointer;
}

/* Lo slot riserva lo spazio della parola: il layout lo decide il CSS, il
   canvas ci disegna dentro. */
.htm-forge-slot {
    position: relative;
    z-index: 1;
    width: min(88vw, 980px);
    aspect-ratio: 3.4 / 1;
    pointer-events: none;
}

.htm-forge-glow {
    position: absolute;
    inset: -20% -10%;
    background: radial-gradient(50% 50% at 50% 55%, color-mix(in srgb, var(--forge-c1) 30%, transparent), transparent 70%);
    filter: blur(20px);
    opacity: 0;
}

.htm-forge-hero .htmb-hero-subtitle {
    position: relative;
    z-index: 2;
    max-width: 92vw;
    min-height: 1.6em;
    margin: clamp(18px, 3vw, 34px) 0 0;
    text-align: center;
    font-family: 'Roboto Mono', monospace;
    font-size: clamp(12px, 2vw, 16px);
    font-weight: 400;
    line-height: 1.6;
    letter-spacing: clamp(2px, 0.5vw, 4px);
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.8);
    animation: none;
}

/* Cursore in attesa: un blocco, resta acceso e lampeggia anche a scrittura
   finita. Sovrascrive la barretta di parallax-header.css. */
.htm-forge-hero .htmb-hero-subtitle::after {
    content: '';
    position: static;
    display: inline-block;
    width: 0.6em;
    height: 1.1em;
    margin-left: 6px;
    vertical-align: text-bottom;
    background: var(--forge-c2);
    opacity: 1;
    animation: htmb-forge-blink 1s step-end infinite;
}

@keyframes htmb-forge-blink {
    50% { opacity: 0; }
}

.htm-forge-hero .htmb-hero-cta {
    position: relative;
    z-index: 2;
    margin-top: clamp(26px, 4vw, 44px);
}

@media (max-width: 767px) {
    .htm-forge-slot { width: 94vw; }
    /* Parola e slogan salgono di 45 px verso il centro ottico; il CTA resta
       dov'e', all'altezza del pollice (61% dello schermo). Lo spazio in piu'
       sotto la hero e quello in piu' sopra il CTA si compensano. */
    .htm-forge-hero { padding-bottom: 125px; }
    .htm-forge-hero .htmb-hero-cta { margin-top: 71px; }
}

/* Desktop: lo slogan risale dello spazio vuoto sotto le lettere (misurato dal
   JS) e le segue a circa 26 px. Su mobile lo spazio di oggi va gia' bene. */
@media (min-width: 768px) {
    .htm-forge-hero .htmb-hero-subtitle {
        margin-top: calc(clamp(18px, 2vw, 26px) - var(--forge-trim, 0px));
    }
}

@media (prefers-reduced-motion: reduce) {
    .htm-forge-hero .htmb-hero-subtitle::after { animation: none; }
}