/* =========================================================
   AQUASPORT SANTERNO — Foglio di stile principale
   Palette: fiume Santerno (blu-verde, verde golena, sabbia)
   ========================================================= */

/* --- VARIABILI -------------------------------------------- */
:root {
  --blu-fiume: #1d5b6f;
  --blu-profondo: #0d3a47;
  --blu-chiaro: #4a8fa3;
  --verde-golena: #4a7c4e;
  --verde-scuro: #2d5230;
  --sabbia: #e8d8b8;
  --sabbia-chiara: #f1e7d0;
  --pietra: #8a8275;
  --schiuma: #f5f1e8;
  --bianco: #ffffff;
  --testo: #1a2e34;
  --testo-tenue: #5a6c72;
  --bordo: #d9d2c2;

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --max-larghezza: 1180px;
  --raggio: 4px;
  --transizione: 0.25s ease;
}

/* --- RESET / BASE ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--testo);
  background: var(--schiuma);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--blu-fiume);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transizione);
}
a:hover { color: var(--blu-profondo); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--blu-profondo);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 400; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; font-family: var(--font-body); font-weight: 600; letter-spacing: 0.02em; }

p { margin: 0 0 1em; }

/* Eyebrow — etichetta sopra i titoli di sezione */
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--verde-golena);
  margin-bottom: 0.8rem;
}

/* --- ACCESSIBILITÀ --------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--blu-profondo);
  color: var(--bianco);
  padding: 0.6rem 1rem;
  z-index: 999;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--verde-golena);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* --- LAYOUT ---------------------------------------------- */
.contenitore {
  width: 100%;
  max-width: var(--max-larghezza);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 4.5rem 0; }
@media (max-width: 720px) { section { padding: 3rem 0; } }

/* --- HEADER / NAV ---------------------------------------- */
.header-sito {
  background: var(--bianco);
  border-bottom: 1px solid var(--bordo);
  position: sticky;
  top: 0;
  z-index: 50;
}

.barra-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--blu-profondo);
  text-decoration: none;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.logo-immagine {
  height: 52px;
  width: auto;
  flex-shrink: 0;
}
.logo-testo {
  display: flex;
  flex-direction: column;
}
.logo small {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--verde-golena);
  margin-top: 2px;
}
@media (max-width: 480px) {
  .logo { font-size: 1.1rem; gap: 0.6rem; }
  .logo-immagine { height: 44px; }
}

.menu {
  list-style: none;
  display: flex;
  gap: 1.8rem;
  margin: 0;
  padding: 0;
}
.menu a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--testo);
  text-decoration: none;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transizione), color var(--transizione);
}
.menu a:hover,
.menu a.attivo {
  color: var(--blu-fiume);
  border-bottom-color: var(--verde-golena);
}

/* Hamburger mobile (puro CSS, no JS) */
.toggle-menu { display: none; }
.label-menu {
  display: none;
  cursor: pointer;
  font-size: 1.5rem;
  background: none;
  border: 1px solid var(--bordo);
  border-radius: var(--raggio);
  width: 42px;
  height: 42px;
  text-align: center;
  line-height: 40px;
  color: var(--blu-profondo);
}

@media (max-width: 860px) {
  .label-menu { display: inline-block; }
  .menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bianco);
    border-bottom: 1px solid var(--bordo);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .menu li { border-top: 1px solid var(--bordo); }
  .menu a { display: block; padding: 1rem 1.5rem; }
  .toggle-menu:checked ~ .menu { max-height: 500px; }
}

/* --- HERO ------------------------------------------------ */
.hero {
  position: relative;
  background: var(--blu-profondo);
  color: var(--bianco);
  padding: 6rem 0 5rem;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(135deg, rgba(13,58,71,0.78), rgba(29,91,111,0.65)),
                    url("images/hero-santerno.jpg");
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero h1 { color: var(--bianco); margin-bottom: 1rem; }
.hero .eyebrow { color: var(--sabbia); }
.hero .sottotitolo {
  font-size: 1.2rem;
  max-width: 640px;
  margin: 0 0 2rem;
  color: rgba(255,255,255,0.92);
}

.hero-piccolo { padding: 4rem 0 3rem; }
.hero-piccolo h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }

/* --- TOPOGRAFIA: motivo distintivo ----------------------- */
/* Sottili curve di livello tra le sezioni, evocano la mappa
   del fiume e ricorrono come elemento d'identità. */
.divisore-topo {
  height: 28px;
  background-image:
    repeating-linear-gradient(
      to right,
      transparent 0,
      transparent 16px,
      rgba(29,91,111,0.18) 16px,
      rgba(29,91,111,0.18) 17px
    ),
    radial-gradient(ellipse 200% 30px at 50% 100%, rgba(74,143,163,0.08), transparent);
  border-bottom: 1px solid var(--bordo);
}

/* --- PULSANTI -------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.85rem 1.6rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--raggio);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transizione);
}
.btn-primario {
  background: var(--verde-golena);
  color: var(--bianco);
}
.btn-primario:hover {
  background: var(--verde-scuro);
  color: var(--bianco);
}
.btn-secondario {
  background: transparent;
  color: var(--bianco);
  border-color: rgba(255,255,255,0.6);
}
.btn-secondario:hover {
  background: var(--bianco);
  color: var(--blu-profondo);
  border-color: var(--bianco);
}
.btn-scuro {
  background: var(--blu-profondo);
  color: var(--bianco);
}
.btn-scuro:hover { background: var(--blu-fiume); color: var(--bianco); }

.gruppo-btn { display: flex; flex-wrap: wrap; gap: 1rem; }

/* --- GRIGLIE GENERICHE ----------------------------------- */
.griglia-2 { display: grid; gap: 2.5rem; grid-template-columns: 1fr; }
.griglia-3 { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.griglia-4 { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .griglia-2 { grid-template-columns: 1fr 1fr; }
  .griglia-3 { grid-template-columns: repeat(3, 1fr); }
  .griglia-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) {
  .griglia-4 { grid-template-columns: repeat(4, 1fr); }
}

/* --- CARD ------------------------------------------------ */
.card {
  background: var(--bianco);
  border: 1px solid var(--bordo);
  border-radius: var(--raggio);
  padding: 1.8rem;
  transition: transform var(--transizione), box-shadow var(--transizione);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(13,58,71,0.08);
}
.card h3 { margin-top: 0; }

.card-attivita {
  background: var(--bianco);
  border-left: 3px solid var(--verde-golena);
  padding: 1.5rem 1.5rem 1.5rem 1.8rem;
}
.card-attivita h3 { color: var(--blu-fiume); margin-bottom: 0.5rem; }
.card-attivita p { color: var(--testo-tenue); margin: 0; }

/* --- FOTO PERSONE (direttivo) ---------------------------- */
.foto-persona {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin: 0 auto 1.2rem;
  background: linear-gradient(135deg, var(--sabbia), var(--sabbia-chiara));
  border: 3px solid var(--bianco);
  box-shadow: 0 4px 12px rgba(13,58,71,0.1);
}
.card-persona {
  text-align: center;
  padding: 2rem 1.5rem;
}
.card-persona h3 { margin: 1rem 0 0.5rem; }

/* --- GRADI DI DIFFICOLTÀ (signature del sito) ------------ */
/* Usa la scala internazionale di classificazione delle rapide
   come elemento ricorrente — è autentica al nostro mondo. */
.grado {
  display: flex;
  gap: 1.5rem;
  padding: 1.8rem;
  background: var(--bianco);
  border: 1px solid var(--bordo);
  border-radius: var(--raggio);
  align-items: flex-start;
}
.grado-numero {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--verde-golena);
  line-height: 1;
  min-width: 70px;
  letter-spacing: -0.02em;
}
.grado-corpo h3 {
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--blu-profondo);
}
.grado-corpo p { margin: 0; color: var(--testo-tenue); font-size: 0.95rem; }

/* --- SEZIONE ALTERNATA ----------------------------------- */
.sezione-scura {
  background: var(--blu-profondo);
  color: var(--bianco);
}
.sezione-scura h2, .sezione-scura h3 { color: var(--bianco); }
.sezione-scura .eyebrow { color: var(--sabbia); }
.sezione-scura p { color: rgba(255,255,255,0.85); }

.sezione-sabbia { background: var(--sabbia-chiara); }

/* --- INTESTAZIONE DI SEZIONE ---------------------------- */
.intro-sezione {
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
}
.intro-sezione p { color: var(--testo-tenue); font-size: 1.05rem; }

/* --- EVENTO / TIMELINE ---------------------------------- */
.evento {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--bordo);
  align-items: start;
}
.evento:last-child { border-bottom: none; }
.evento-data {
  font-family: var(--font-display);
  text-align: center;
  padding: 0.8rem 0.6rem;
  background: var(--sabbia-chiara);
  border-radius: var(--raggio);
}
.evento-data .giorno {
  display: block;
  font-size: 2rem;
  font-weight: 500;
  line-height: 1;
  color: var(--blu-profondo);
}
.evento-data .mese {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--verde-golena);
  margin-top: 4px;
}
.evento-corpo h3 { margin-bottom: 0.3rem; }
.evento-corpo .luogo {
  font-size: 0.9rem;
  color: var(--testo-tenue);
  margin-bottom: 0.5rem;
}

/* --- GALLERIA -------------------------------------------- */
.galleria {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}
@media (min-width: 720px) {
  .galleria { grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
}
@media (min-width: 980px) {
  .galleria { grid-template-columns: repeat(4, 1fr); }
}
.galleria figure {
  margin: 0;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--sabbia);
  border-radius: var(--raggio);
}
.galleria img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.galleria figure:hover img { transform: scale(1.04); }

/* --- FORM ------------------------------------------------ */
.form {
  background: var(--bianco);
  padding: 2.5rem;
  border-radius: var(--raggio);
  border: 1px solid var(--bordo);
}
@media (max-width: 600px) { .form { padding: 1.5rem; } }

.campo {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.3rem;
}
.campo label {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--blu-profondo);
}
.campo input,
.campo select,
.campo textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--bordo);
  border-radius: var(--raggio);
  background: var(--schiuma);
  color: var(--testo);
  transition: border-color var(--transizione), background var(--transizione);
}
.campo input:focus,
.campo select:focus,
.campo textarea:focus {
  outline: none;
  border-color: var(--verde-golena);
  background: var(--bianco);
}
.campo textarea { min-height: 130px; resize: vertical; }

.campo-checkbox {
  flex-direction: row;
  align-items: flex-start;
  gap: 0.7rem;
}
.campo-checkbox input { margin-top: 4px; }
.campo-checkbox label { font-weight: 400; font-size: 0.9rem; }

.griglia-form {
  display: grid;
  gap: 1.3rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .griglia-form { grid-template-columns: 1fr 1fr; }
  .griglia-form .campo { margin-bottom: 0; }
  .larghezza-piena { grid-column: 1 / -1; }
}

/* --- INFOBOX (es. IBAN, recapiti) ----------------------- */
.infobox {
  background: var(--sabbia-chiara);
  border-left: 3px solid var(--verde-golena);
  padding: 1.3rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--raggio) var(--raggio) 0;
}
.infobox h4 { color: var(--blu-profondo); margin: 0 0 0.5rem; }
.infobox p { margin: 0; }
.infobox code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  background: var(--bianco);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--bordo);
}

/* --- LISTE PERSONALIZZATE -------------------------------- */
.lista-pulita { list-style: none; padding: 0; margin: 0; }
.lista-pulita li {
  padding: 0.6rem 0 0.6rem 1.8rem;
  border-bottom: 1px solid var(--bordo);
  position: relative;
}
.lista-pulita li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--verde-golena);
  font-weight: 700;
  font-size: 1.2rem;
  top: 0.5rem;
}
.lista-pulita li:last-child { border-bottom: none; }

/* --- FOOTER ---------------------------------------------- */
.footer-sito {
  background: var(--blu-profondo);
  color: rgba(255,255,255,0.85);
  padding: 3.5rem 0 1.5rem;
  font-size: 0.92rem;
}
.footer-sito h4 {
  color: var(--bianco);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-sito a {
  color: var(--sabbia);
  text-decoration: none;
}
.footer-sito a:hover { color: var(--bianco); text-decoration: underline; }
.footer-sito ul { list-style: none; padding: 0; margin: 0; }
.footer-sito li { margin-bottom: 0.5rem; }

.griglia-footer {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 720px) {
  .griglia-footer { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}

.colofone {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
}
.colofone a { color: rgba(255,255,255,0.7); }

/* --- ELEMENTI VARI -------------------------------------- */
.evidenza { color: var(--verde-golena); font-weight: 600; }

.badge {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  background: var(--verde-golena);
  color: var(--bianco);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 999px;
  text-transform: uppercase;
}

.testo-centro { text-align: center; }


/* --- Menu mobile fallback (JS-based) ----------------------- */
@media (max-width: 819px) {
  .menu-aperto {
    display: flex !important;
    max-height: 500px !important;
    overflow: visible !important;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bianco);
    padding: 1rem 1.5rem;
    margin: 0;
    box-shadow: 0 6px 18px rgba(13, 58, 71, 0.12);
    border-top: 1px solid var(--bordo);
    z-index: 100;
    gap: 0.25rem;
  }
  .menu-aperto li {
    list-style: none;
  }
  .menu-aperto a {
    display: block;
    padding: 0.75rem 0;
    font-size: 1.05rem;
    text-decoration: none;
    border-bottom: 1px solid var(--bordo);
    color: var(--blu-profondo);
  }
  .menu-aperto li:last-child a {
    border-bottom: none;
  }
}