/* PDF Side Viewer landing. Foglio unico condiviso dalle tre lingue.
   Nessuna dipendenza esterna: font di sistema, zero richieste di rete. */

:root {
    --bg: #ffffff;
    --bg-soft: #f4f6f9;
    --fg: #1b1f24;
    --fg-soft: #5a6570;
    --accent: #1f5fa9;
    --accent-fg: #ffffff;
    --border: #d8dee6;
    --radius: 10px;
    /* Ombra della finestra in stile Windows 10: tre livelli, netta e stretta
       vicino al bordo, poi larga e diffusa verso il basso. */
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.10),
              0 8px 20px rgba(0, 0, 0, 0.16),
              0 18px 44px rgba(0, 0, 0, 0.10);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14181d;
        --bg-soft: #1c2229;
        --fg: #e7ebf0;
        --fg-soft: #a3aeb9;
        --accent: #6ba4e8;
        --accent-fg: #10151a;
        --border: #2b333c;
        /* Su fondo scuro un'ombra tenue non si vede: serve piu' opaca. */
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.45),
                  0 8px 20px rgba(0, 0, 0, 0.55),
                  0 18px 44px rgba(0, 0, 0, 0.40);
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.65 "Segoe UI", system-ui, -apple-system, sans-serif;
    -webkit-text-size-adjust: 100%;
}

.wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ------------------------------------------------------------- intestazione */

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
}

.brand {
    font-weight: 600;
    font-size: 1.05rem;
}

.langs {
    display: flex;
    gap: 6px;
    font-size: 0.9rem;
}

.langs a {
    padding: 3px 9px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--fg-soft);
}

.langs a:hover { background: var(--bg-soft); }

.langs a[aria-current="true"] {
    background: var(--accent);
    color: var(--accent-fg);
}

/* --------------------------------------------------------------------- hero */

header.hero {
    padding: 46px 0 8px;
    text-align: center;
}

header.hero h1 {
    margin: 0 0 12px;
    font-size: clamp(1.9rem, 5vw, 2.7rem);
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.tagline {
    margin: 0 auto;
    max-width: 40em;
    font-size: clamp(1rem, 2.4vw, 1.2rem);
    color: var(--fg-soft);
}

.buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin: 30px 0 10px;
}

.btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
    text-decoration: none;
    font-weight: 600;
    color: var(--accent);
}

.btn:hover { background: var(--bg-soft); }

.btn.primary {
    background: var(--accent);
    color: var(--accent-fg);
}

.btn.primary:hover { filter: brightness(1.08); }

.btn small {
    display: block;
    font-weight: 400;
    font-size: 0.78rem;
    opacity: 0.85;
}

.sysreq {
    margin: 6px 0 0;
    font-size: 0.85rem;
    color: var(--fg-soft);
}

/* Intestazione delle pagine di servizio (privacy): titolo allineato a sinistra,
   senza il trattamento centrato della hero. */
header.page {
    padding: 42px 0 4px;
}

header.page h1 {
    margin: 0 0 8px;
    font-size: clamp(1.6rem, 4vw, 2.1rem);
    line-height: 1.25;
}

header.page .updated {
    margin: 0;
    font-size: 0.88rem;
    color: var(--fg-soft);
}

/* ---------------------------------------------------------------- immagine */

figure.shot {
    /* Il margine inferiore lascia respiro all'ombra, che sborda in basso. */
    margin: 34px 0 12px;
}

/* Angoli vivi di proposito: e' la cattura di una finestra Win32, e un raggio di
   curvatura la farebbe sembrare ritagliata male. Il bordo sottile piu' l'ombra
   riproducono il modo in cui Windows 10 stacca una finestra dallo sfondo. */
figure.shot img {
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    display: block;
    box-shadow: var(--shadow);
}

figure.shot figcaption {
    margin-top: 10px;
    font-size: 0.88rem;
    color: var(--fg-soft);
    text-align: center;
}

figure.shot b { color: var(--fg); }

/* --------------------------------------------------------------- contenuto */

section {
    padding: 40px 0 4px;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

section:first-of-type {
    border-top: 0;
}

h2 {
    font-size: 1.4rem;
    margin: 0 0 14px;
}

h3 {
    font-size: 1.05rem;
    margin: 0 0 6px;
}

p { margin: 0 0 14px; }

.lead {
    max-width: 46em;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px 30px;
    margin-top: 22px;
}

.grid p {
    color: var(--fg-soft);
    margin: 0;
    font-size: 0.95rem;
}

.note {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    font-size: 0.94rem;
}

.note p:last-child { margin-bottom: 0; }

code, kbd {
    font-family: "Cascadia Mono", Consolas, ui-monospace, monospace;
    font-size: 0.88em;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
}

pre {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    overflow-x: auto;
}

pre code {
    background: none;
    border: 0;
    padding: 0;
}

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

ul.plain {
    margin: 0;
    padding-left: 1.2em;
}

ul.plain li { margin-bottom: 6px; }

/* ------------------------------------------------------------------ footer */

footer {
    margin-top: 46px;
    padding: 26px 0 40px;
    border-top: 1px solid var(--border);
    font-size: 0.88rem;
    color: var(--fg-soft);
}

footer p { margin: 0 0 8px; }