/* =========================================================================
   VII Meeting nazionale delle Riserve della Biosfera MAB UNESCO — Sila 2026
   Design system: vedi SPEC sezione 10. Stesso sistema usato nei mockup.
   ========================================================================= */

:root {
  /* Colori */
  --verde-900: #1d3b2a;   /* testo su chiaro, footer */
  --verde-700: #2f5d3e;   /* primario: pulsanti, link, legend */
  --verde-500: #4f8a63;   /* hover, bordi attivi */
  --verde-100: #e6efe8;   /* sfondi sezione alternati */
  --lago-600:  #2c6a8f;   /* accento secondario (badge facoltativa, link visitati) */
  --ocra-500:  #c58a2f;   /* badge "riservata", avvisi */
  --rosso-600: #b3261e;   /* errori */
  --grigio-900:#1f2320;   /* testo principale */
  --grigio-600:#5b625d;   /* testo secondario */
  --grigio-300:#cfd4d0;   /* bordi input */
  --grigio-100:#f5f7f5;   /* sfondo pagina */
  --bianco:    #ffffff;

  /* Tipografia (font di sistema, nessun font remoto) */
  --font-titoli: Georgia, 'Times New Roman', serif;
  --font-testo: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --fs-base: 1.0625rem;     /* 17px */
  --lh-base: 1.6;

  /* Spaziatura (scala 8pt) */
  --s-1: .5rem; --s-2: 1rem; --s-3: 1.5rem; --s-4: 2rem; --s-6: 3rem; --s-8: 4rem;

  --radius: 6px;
  --shadow: 0 2px 8px rgba(0,0,0,.08);
  --max-w: 1100px;
  --max-w-form: 760px;
}

/* Reset minimo */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-testo);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--grigio-900);
  background: var(--grigio-100);
}
img { max-width: 100%; display: block; }
a { color: var(--lago-600); }
a:hover, a:focus { color: var(--verde-900); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 1000;
  background: var(--verde-900); color: #fff; padding: .75rem 1.25rem; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* Tipografia */
h1, h2, h3 { font-family: var(--font-titoli); color: var(--verde-900); margin: 0 0 var(--s-2); }
h1 { font-size: 2.25rem; line-height: 1.15; }
h2 { font-size: 1.75rem; padding-bottom: .5rem; position: relative; }
h2.with-rule::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 48px; height: 3px; background: var(--verde-500);
}
h2.centered.with-rule::after { left: 50%; transform: translateX(-50%); }
h3 { font-size: 1.25rem; font-family: var(--font-testo); font-weight: 600; }
p { max-width: 70ch; margin: 0 0 var(--s-2); }
.text-center { text-align: center; }
.text-muted { color: var(--grigio-600); }

@media (max-width: 640px) {
  h1 { font-size: 1.75rem; }
}

/* Layout */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--s-2); }
@media (min-width: 641px) { .container { padding: 0 var(--s-4); } }
.container-form { max-width: var(--max-w-form); margin: 0 auto; padding: 0 var(--s-2); }
.section { padding: var(--s-8) 0; }
.section-alt { background: var(--verde-100); }
.grid { display: grid; gap: var(--s-3); grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* Pulsanti */
.btn {
  display: inline-block; padding: .75rem 1.5rem; border-radius: var(--radius);
  font-family: var(--font-testo); font-weight: 600; font-size: 1rem; text-decoration: none;
  border: none; cursor: pointer; min-height: 44px; line-height: 1.2;
}
.btn-primary { background: var(--verde-700); color: #fff; }
.btn-primary:hover, .btn-primary:focus { background: var(--verde-500); color: #fff; }
.btn-secondary { background: transparent; color: var(--verde-700); border: 2px solid var(--verde-700); padding: calc(.75rem - 2px) calc(1.5rem - 2px); }
.btn-secondary:hover, .btn-secondary:focus { background: var(--verde-100); }
.btn-danger { background: var(--rosso-600); color: #fff; }
.btn-onaccent { background: #fff; color: var(--verde-700); }
.btn-block { display: block; width: 100%; text-align: center; }
:is(.btn, a, button, input, select, textarea):focus-visible {
  outline: 3px solid var(--ocra-500); outline-offset: 2px;
}

/* Card */
.card { background: #fff; border: 1px solid var(--grigio-300); border-radius: var(--radius); padding: var(--s-3); box-shadow: var(--shadow); }

/* Badge */
.badge { display: inline-block; padding: 2px 10px; border-radius: 4px; font-size: .75rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.badge-riservata { background: var(--ocra-500); color: var(--grigio-900); }
.badge-facoltativa { background: var(--lago-600); color: #fff; }

/* Avvisi */
.alert { border-left: 4px solid; padding: .9rem 1.25rem; border-radius: 4px; margin-bottom: var(--s-3); }
.alert-info { background: #e8f1f6; border-color: var(--lago-600); }
.alert-warn { background: #fbf1e1; border-color: var(--ocra-500); }
.alert-error { background: #fbe9e8; border-color: var(--rosso-600); }
.alert-success { background: var(--verde-100); border-color: var(--verde-700); }

/* Tabella programma */
table.programma { width: 100%; border-collapse: collapse; }
table.programma th, table.programma td { text-align: left; padding: .6rem .75rem; font-size: .95rem; vertical-align: top; }
table.programma thead th { border-bottom: 2px solid var(--verde-700); color: var(--verde-900); font-family: var(--font-titoli); }
table.programma tbody tr:nth-child(even) { background: var(--verde-100); }
table.programma td:first-child { white-space: nowrap; width: 5.5rem; font-weight: 600; }
@media (max-width: 640px) {
  table.programma, table.programma thead, table.programma tbody, table.programma th, table.programma td, table.programma tr { display: block; }
  table.programma thead { display: none; }
  table.programma tr { border-bottom: 1px solid var(--grigio-300); padding: .5rem 0; }
  table.programma td { padding: .2rem 0; }
  table.programma td::before { content: attr(data-label); display: block; font-size: .75rem; color: var(--grigio-600); font-weight: 600; }
}

/* Nav */
.site-nav { position: sticky; top: 0; z-index: 100; background: #fff; box-shadow: var(--shadow); }
.site-nav .container { position: relative; display: flex; align-items: center; justify-content: space-between; min-height: 64px; flex-wrap: wrap; gap: var(--s-2); padding-top: .5rem; padding-bottom: .5rem; }
.site-nav .logo { font-family: var(--font-titoli); font-weight: 700; font-size: 1.1rem; color: var(--verde-700); text-decoration: none; }
.site-nav .links { display: flex; align-items: center; gap: var(--s-3); font-weight: 600; overflow-x: auto; white-space: nowrap; }
.site-nav .links a:not(.btn) { text-decoration: none; }
.site-nav .links a:not(.btn):hover, .site-nav .links a:not(.btn):focus { text-decoration: underline; }
.nav-toggle {
  display: none; width: 44px; height: 44px; padding: 10px; flex: 0 0 44px;
  border: 0; border-radius: var(--radius); background: transparent; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px; margin: 5px 0;
  background: var(--verde-900); transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
@media (max-width: 640px) {
  .site-nav .container { flex-wrap: nowrap; }
  .site-nav .logo { min-width: 0; }
  .site-nav.nav-ready .nav-toggle { display: block; }
  .site-nav.nav-ready .links {
    display: none; position: absolute; z-index: 10; top: 100%; left: var(--s-2); right: var(--s-2);
    flex-direction: column; align-items: stretch; gap: 0; overflow: visible; white-space: normal;
    padding: var(--s-1); background: #fff; border: 1px solid var(--grigio-300);
    border-radius: var(--radius); box-shadow: var(--shadow);
  }
  .site-nav.nav-ready .links.is-open { display: flex; }
  .site-nav.nav-ready .links a { padding: .75rem; }
  .site-nav.nav-ready .links .btn { text-align: center; }
}

/* Hero */
.hero {
  position: relative; overflow: hidden; color: #fff; text-align: center;
  padding: var(--s-8) var(--s-2); min-height: 60vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: linear-gradient(180deg, var(--verde-700) 0%, var(--verde-900) 65%, #14251c 100%);
}
.hero::after {
  content: ""; position: absolute; bottom: 0; left: 0; right: 0; height: 48px;
  background-image: linear-gradient(135deg, transparent 50%, #14251c 50%), linear-gradient(45deg, transparent 50%, #14251c 50%);
  background-size: 32px 48px; opacity: .9;
}
.hero .loghi {
  display: flex; align-items: center; justify-content: center;
  gap: var(--s-2); width: 100%; margin: 0 auto var(--s-4);
}
.hero .loghi img {
  display: block; width: auto; height: 200px; object-fit: contain;
}
@media (max-width: 880px) {
  .hero .loghi {
    display: grid; grid-template-columns: 3.6fr 1fr 1fr;
    height: clamp(88px, 20vw, 160px);
  }
  .hero .loghi img { width: 100%; height: 100%; min-width: 0; }
}
.hero h1 { color: #fff; max-width: 820px; margin: 0 0 var(--s-2); }
.hero .sottotitolo { font-size: 1.25rem; color: var(--verde-100); font-weight: 500; margin-bottom: var(--s-4); }

/* Footer */
.site-footer { background: var(--verde-900); color: var(--verde-100); padding: var(--s-6) 0; }
.site-footer a { color: var(--verde-100); }
.site-footer .loghi {
  display: grid; grid-template-columns: 2.5fr 1fr 1fr; align-items: stretch;
  gap: var(--s-2); width: min(100%, 360px); height: 80px; margin-bottom: var(--s-3);
}
.site-footer .loghi img {
  display: block; width: 100%; height: 100%; min-width: 0; object-fit: contain;
}
.site-footer .links { display: flex; gap: var(--s-4); flex-wrap: wrap; margin-bottom: var(--s-2); }
.site-footer small { color: #a9b8ac; }

/* CTA finale */
.cta-finale { background: var(--verde-700); color: #fff; text-align: center; padding: var(--s-6) var(--s-2); }
.cta-finale h2 { color: #fff; }

/* Form */
fieldset { border: 1px solid var(--grigio-300); border-radius: var(--radius); padding: var(--s-3); margin: 0 0 var(--s-3); }
legend { padding: 0 .5rem; color: var(--verde-700); font-size: 1.125rem; font-weight: 600; }
.field { margin-bottom: var(--s-2); }
.field:last-child { margin-bottom: 0; }
.field > label, fieldset > label { display: block; font-weight: 600; margin-bottom: .35rem; }
.field .hint { display: block; font-weight: 400; font-size: .85rem; color: var(--grigio-600); margin-top: .25rem; }
.req { color: var(--rosso-600); }
input[type="text"], input[type="email"], input[type="tel"], input[type="date"], input[type="time"],
input[type="number"], select, textarea {
  width: 100%; min-height: 44px; padding: .6rem .75rem; border: 1px solid var(--grigio-300);
  border-radius: var(--radius); font-size: 1rem; font-family: inherit; color: var(--grigio-900); background: #fff;
}
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--verde-500); outline: 3px solid var(--ocra-500); outline-offset: 1px; }
[aria-invalid="true"] { border-color: var(--rosso-600); }
.field-error { color: var(--rosso-600); font-size: .85rem; margin-top: .35rem; }

.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--s-2) var(--s-3); }
@media (min-width: 641px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.span-2 { grid-column: 1 / -1; }

.checkbox-group, .radio-group { display: flex; flex-wrap: wrap; gap: .75rem 1.75rem; }
.checkbox-row { display: flex; align-items: flex-start; gap: .5rem; font-size: 1rem; min-height: 28px; cursor: pointer; }
.checkbox-row input { width: 20px; height: 20px; min-height: 0; margin-top: 2px; flex-shrink: 0; }
.checkbox-row.stacked { display: flex; }
.checkbox-list { display: flex; flex-direction: column; gap: .6rem; }

.cond-block { border-left: 3px solid var(--verde-100); padding-left: var(--s-2); margin-top: var(--s-2); }

.riepilogo-errori { border: 2px solid var(--rosso-600); background: #fbe9e8; border-radius: var(--radius); padding: var(--s-2) var(--s-3); margin-bottom: var(--s-3); }
.riepilogo-errori a { color: var(--rosso-600); font-weight: 600; }

.cf-turnstile { margin: var(--s-2) 0; }

/* Campo honeypot anti-spam: invisibile ma presente nel DOM (accessibile solo ai bot) */
.campo-trappola {
  position: absolute !important; left: -9999px !important; top: -9999px !important;
  height: 1px; width: 1px; overflow: hidden;
}

/* Admin */
.admin-body { background: var(--grigio-100); }
.admin-bar { background: var(--verde-900); color: #fff; padding: .75rem 0; }
.admin-bar .container { display: flex; justify-content: space-between; align-items: center; }
.admin-bar a { color: #fff; }
.admin-table { width: 100%; border-collapse: collapse; font-size: .9rem; background: #fff; }
.admin-table th, .admin-table td { padding: .5rem .6rem; border-bottom: 1px solid var(--grigio-300); text-align: left; }
.admin-table thead th { background: var(--verde-100); color: var(--verde-900); position: sticky; top: 0; }
.admin-filtri { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--s-2); background: #fff; padding: var(--s-2); border-radius: var(--radius); margin-bottom: var(--s-3); border: 1px solid var(--grigio-300); }
.admin-contatori { display: flex; gap: var(--s-2); flex-wrap: wrap; margin-bottom: var(--s-3); }
.admin-contatori .stat { background: #fff; border: 1px solid var(--grigio-300); border-radius: var(--radius); padding: .75rem 1rem; }
.admin-contatori .stat strong { display: block; font-size: 1.5rem; color: var(--verde-700); }
.stato-badge { display: inline-block; padding: 2px 10px; border-radius: 4px; font-size: .75rem; font-weight: 700; }
.stato-Ricevuta { background: var(--grigio-300); color: var(--grigio-900); }
.stato-In-verifica { background: var(--lago-600); color: #fff; }
.stato-Confermata { background: var(--verde-700); color: #fff; }
.stato-In-lista-d-attesa { background: var(--ocra-500); color: var(--grigio-900); }
.stato-Annullata { background: var(--rosso-600); color: #fff; }
.stato-Dati-incompleti { background: #fff; color: var(--rosso-600); border: 1px solid var(--rosso-600); }
.login-box { max-width: 360px; margin: var(--s-8) auto; }

/* Riduzione movimento */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* Stampa */
@media print {
  .site-nav, .btn, .cta-finale, .no-print { display: none !important; }
}