/* Sito pubblico del chapter: una pagina, bianco e nero con il blu come unico accento.
   CSS semplice, senza build. */
:root {
    --black: #0a0a0a;
    --white: #ffffff;
    --grey: #8a8a8a;
    --line: #262626;
    --blue: #1d4ed8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--black);
    color: var(--white);
    font: 18px/1.6 "Helvetica Neue", Helvetica, Arial, sans-serif;
}
a { color: inherit; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
section[id] { scroll-margin-top: 64px; }

/* Testata fissa */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--black); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; min-height: 64px; padding-top: 8px; padding-bottom: 8px; }
.brand { text-decoration: none; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; font-size: .9em; }
.brand span { color: var(--grey); }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: .8em; text-transform: uppercase; letter-spacing: .1em; }
.site-nav a { text-decoration: none; color: var(--grey); }
.site-nav a:hover { color: var(--white); }
.site-nav a.members { color: var(--white); border-bottom: 2px solid var(--blue); }

/* Apertura */
.hero { min-height: 78vh; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
.hero .wrap { width: 100%; padding-top: 80px; padding-bottom: 80px; }
.kicker, .label { text-transform: uppercase; letter-spacing: .25em; font-size: .75em; color: var(--grey); margin: 0 0 16px; }
.hero h1 { font-size: clamp(3rem, 11vw, 8.5rem); line-height: .9; font-weight: 900; text-transform: uppercase; letter-spacing: -.01em; margin: 0; }
.hero .chapter { font-size: clamp(1.4rem, 4vw, 2.6rem); font-weight: 300; text-transform: uppercase; letter-spacing: .3em; margin: 16px 0 0; }
.hero .tagline { margin: 40px 0 0; padding-top: 16px; border-top: 3px solid var(--blue); display: inline-block; text-transform: uppercase; letter-spacing: .2em; font-size: .8em; }

/* Sezioni */
.band { padding: 96px 0; }
.band.light { background: var(--white); color: var(--black); }
.band.light .label, .band.light .facts span { color: #555; }
.band.accent { background: var(--blue); }
.band h2 { font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1; font-weight: 900; text-transform: uppercase; margin: 0 0 28px; }
.lead { font-size: 1.25em; max-width: 720px; margin: 0 0 32px; }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); border-top: 1px solid currentColor; }
.facts div { padding: 24px 24px 0 0; }
.facts strong { display: block; font-size: 3em; font-weight: 900; line-height: 1; }
.facts span { display: block; margin-top: 8px; color: var(--grey); }

.chapters { list-style: none; padding: 0; margin: 0 0 32px; display: flex; flex-wrap: wrap; gap: 8px; }
.chapters li { border: 1px solid var(--line); padding: 8px 16px; text-transform: uppercase; letter-spacing: .1em; font-size: .85em; }
.chapters li.current { border-color: var(--white); background: var(--white); color: var(--black); font-weight: 700; }

.link { text-decoration: none; border-bottom: 2px solid var(--blue); }
.button { display: inline-block; text-decoration: none; background: var(--black); color: var(--white); padding: 14px 28px; text-transform: uppercase; letter-spacing: .15em; font-size: .85em; font-weight: 700; }
.button:hover { background: var(--blue); }

/* Piè di pagina */
.site-footer { border-top: 1px solid var(--line); color: var(--grey); font-size: .75em; text-transform: uppercase; letter-spacing: .15em; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-top: 24px; padding-bottom: 24px; }
.site-footer p { margin: 0; }
.langs a { text-decoration: none; margin-left: 10px; }
.langs a.active { color: var(--white); }

@media (max-width: 600px) {
    .band { padding: 64px 0; }
    .site-nav { gap: 4px 14px; }
}

/* Prossimo evento nella sezione anniversario */
.event { border-top: 1px solid rgba(255, 255, 255, .4); padding-top: 24px; margin-top: 8px; }
.event-name { font-size: 1.3em; font-weight: 800; text-transform: uppercase; margin: 0 0 4px; }
.event-meta { margin: 0 0 24px; opacity: .85; }
.button.invert { background: var(--white); color: var(--black); }
.button.invert:hover { background: var(--black); color: var(--white); }