:root {
  --c-bg: #0A0D18;
  --c-ink: #EBF0F7;
  --c-ink-muted: #9DA8B7;
  --c-accent-primary: #E53945;
  --c-accent-secondary: #00A9E0;
  --c-glass: rgba(18, 21, 36, 0.7);
  --c-stroke: rgba(163, 177, 194, 0.15);

  --font-primary: 'Space Grotesk', sans-serif;
  --font-display: 'Playfair Display', serif;

  --radius: 12px;
  --transition: 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  --hero-bg-image: url('foto.jpeg');
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-primary);
  background-color: var(--c-bg);
  color: var(--c-ink);
  overflow-x: hidden;
  line-height: 1.6;
}
.chip{
  display:inline-block;
  margin:6px 1px;
  padding:8px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.08);
  border:1px solid var(--stroke);
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3 { font-weight: 700; margin: 0; }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.6rem);
  margin-bottom: 60px;
  text-align: center;
  position: relative;
}
.section-title::before {
  content: '';
  position: absolute;
  bottom: -15px; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 3px;
  background: linear-gradient(to right, var(--c-accent-primary), var(--c-accent-secondary));
  border-radius: 2px;
}

.background-grid {
  position: fixed; top: 0; left: 0;
  width: 100vw; height: 100vh;
  background-image: linear-gradient(to right, var(--c-stroke) 1px, transparent 1px),
                    linear-gradient(to bottom, var(--c-stroke) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.08;
  z-index: -2;
}

#header {
  position: sticky; top: 0; z-index: 100;
  padding: 18px 0;
  width: 100%;
  background-color: transparent;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition), border-color var(--transition);
}
#header.scrolled { background-color: var(--c-glass); border-color: var(--c-stroke); }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.6rem; font-weight: 700; }
.logo strong { color: var(--c-accent-primary); }
.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-link { color: var(--c-ink-muted); font-weight: 500; transition: color var(--transition); position: relative; padding: 5px 0; }
.nav-link:hover { color: var(--c-accent-primary); }
.nav-link::after { /* Sottolineatura animata */
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--c-accent-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease-out;
}
.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* --- HERO SECTION --- */
/* --- HERO SECTION --- */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding: 80px 0;
  overflow: hidden;
}
.hero-background {
  position: absolute; top: 0; left: 0; z-index: -1;
  width: 100%; height: 100%;
  background:
    linear-gradient(180deg, rgba(10, 13, 24, 0) 40%, var(--c-bg) 85%), /* Gradiente più corto per mostrare più immagine */
    var(--hero-bg-image) center/cover no-repeat;
  opacity: 0.45; /* Aumentata l'opacità generale */
  filter: saturate(0.9) brightness(0.85); /* Aumentata la luminosità per farla vedere di più */
}
.hero__heart-container {
  position: relative;
  width: 160px; height: 160px;
  margin: 0 auto 30px;
  display: flex; align-items: center; justify-content: center;
}
#hero-heart { width: 100%; height: 100%; animation: pulse-heart 1.8s infinite ease-in-out; }
#hero-heart path { fill: var(--c-accent-primary); stroke: var(--c-accent-primary); stroke-width: 4; }
.pulse-wave {
  position: absolute;
  width: 100%; height: 100%;
  border-radius: 50%;
  background-color: var(--c-accent-primary);
  opacity: 0;
  animation: pulse-wave 2s infinite ease-out;
}
@keyframes pulse-heart { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }
@keyframes pulse-wave { 0% { transform: scale(0.5); opacity: 0.4; } 100% { transform: scale(1.5); opacity: 0; } }
.hero h1 { font-family: var(--font-display); font-size: clamp(3rem, 8vw, 4.8rem); line-height: 1.1; }
.hero .subtitle { font-size: clamp(1.1rem, 2.5vw, 1.4rem); color: var(--c-ink-muted); margin: 15px 0 40px; }
.countdown { display:flex; justify-content:center; gap:15px; margin-bottom: 50px; flex-wrap: wrap; }
.timebox { background: var(--c-glass); padding: 12px; min-width: 80px; border: 1px solid var(--c-stroke); border-radius: var(--radius); }
.timebox .num { font-size: 1.8rem; font-weight: 700; color: var(--c-accent-primary); }
.timebox .lab { font-size: 0.8rem; color: var(--c-ink-muted); margin-top: 5px; }

/* --- CARD INTERATTIVA --- */
.interactive-card {
  background-color: var(--c-glass);
  border-radius: var(--radius);
  border: 1px solid var(--c-stroke);
  transition: transform var(--transition), border-color var(--transition);
}
.interactive-card:hover {
  transform: translateY(-5px);
  border-color: rgba(229, 57, 69, 0.4);
}

/* --- PROGRAMMA --- */
.day-switch { display: flex; justify-content: center; gap: 15px; margin-bottom: 40px; flex-wrap: wrap; }
.pill { padding: 10px 22px; border: 1px solid var(--c-stroke); border-radius: 99px; background-color: transparent; color: var(--c-ink-muted); font-weight: 500; cursor: pointer; transition: all var(--transition); }
.pill:hover { background-color: var(--c-glass); color: var(--c-ink); }
.pill.active { background-color: var(--c-accent-primary); color: #fff; border-color: var(--c-accent-primary); }

.program__content { padding: 0; }
.day-panel { display: none; flex-direction: column; }
.day-panel.active { display: flex; }
.program-slot {
  display: grid; grid-template-columns: 90px 1fr auto; align-items: center; gap: 20px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--c-stroke);
  cursor: pointer;
  transition: background-color var(--transition);
}
.program-slot:last-child { border-bottom: none; }
.program-slot:hover { background-color: rgba(229, 57, 69, 0.05); }
.program-slot:hover .slot-title { color: var(--c-accent-primary); }
.slot-time { font-weight: 700; color: var(--c-accent-secondary); }
.slot-title { transition: color var(--transition); }
.slot-speaker { color: var(--c-ink-muted); text-align: right; }

/* --- SEZIONI --- */
.speakers__grid, .gallery__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.speaker-card { padding: 0; text-align: center; }
.speaker-card img { width: 100%; height: 280px; object-fit: cover; border-radius: var(--radius) var(--radius) 0 0; }
.speaker-card h3 { font-size: 1.4rem; margin: 20px 0 8px; }
.speaker-card p { color: var(--c-ink-muted); margin: 0; padding: 0 20px; }
.speaker-card .muted { font-size: 0.9rem; margin-top: 8px; padding-bottom: 20px; color: var(--c-accent-primary); }

.gallery__item { padding: 0; position: relative; }
.gallery__item img { width: 100%; height: 220px; object-fit: cover; border-radius: var(--radius); }
.gallery__label { position: absolute; bottom: 20px; left: 20px; padding: 8px 14px; background-color: var(--c-glass); border-radius: 8px; font-weight: 500; }

.contact { text-align: center; }
.contact__actions { display: flex; justify-content: center; align-items: center; gap: 30px; flex-wrap: wrap; }
.btn {
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 700;
  transition: all var(--transition);
  border: 1px solid var(--c-accent-primary);
  background: transparent;
  color: var(--c-accent-primary);
  cursor: pointer;
}
.btn--primary { background-color: var(--c-accent-primary); color: #fff; }
.btn:hover { box-shadow: 0 0 25px rgba(229, 57, 69, 0.4); transform: translateY(-3px); }
.social-links { display: flex; gap: 15px; }
.social-links a {
  display: flex; align-items: center; justify-content: center;
  width: 50px; height: 50px;
  border: 1px solid var(--c-stroke);
  border-radius: 50%;
  transition: all var(--transition);
}
.social-links svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 2; }
.social-links a:hover { background-color: var(--c-accent-primary); border-color: var(--c-accent-primary); color: #fff; }
.footer { padding: 40px 0; text-align: center; border-top: 1px solid var(--c-stroke); color: var(--c-ink-muted); font-size: 0.9rem; }

/* --- FINESTRE MODALI (PDF & LIGHTBOX) --- */
.pdf-modal, .lightbox {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s ease, visibility 0s 0.3s linear;
}
.pdf-modal.open, .lightbox.open { opacity: 1; visibility: visible; transition-delay: 0s; }
.pdf-modal__box, .lightbox__image {
  transform: scale(0.95);
  transition: transform 0.3s ease;
}
.pdf-modal.open .pdf-modal__box, .lightbox.open .lightbox__image { transform: scale(1); }
.pdf-modal__box {
    position: relative;
    width: min(95%, 1100px);
    height: 90vh;
    display: flex; flex-direction: column;
    background-color: var(--c-bg);
    border: 1px solid var(--c-stroke);
    border-radius: var(--radius);
}
.pdf-modal__header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--c-stroke);
}
.pdf-modal__header h3 { font-family: var(--font-primary); font-size: 1.1rem; }
.pdf-modal__body { flex-grow: 1; }
.pdf-modal__close, .lightbox__close {
  background: none; border: none; font-size: 2.5rem; color: var(--c-ink-muted);
  cursor: pointer; transition: color var(--transition);
}
.pdf-modal__close:hover, .lightbox__close:hover { color: var(--c-accent-primary); }
#pdfFrame { width: 100%; height: 100%; border: none; border-bottom-left-radius: var(--radius); border-bottom-right-radius: var(--radius); }
.lightbox__image { max-width: 90vw; max-height: 90vh; }
.lightbox__close { position: absolute; top: 20px; right: 30px; }

/*
==============================================
--- MEDIA QUERIES PER IL MOBILE ---
==============================================
*/
@media (max-width: 768px) {
  .section-title { margin-bottom: 40px; }

  /* --- Menu Hamburger --- */
  .nav-menu-toggle {
    display: block; /* Mostra il bottone hamburger */
    z-index: 1001;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
  }
  .hamburger-icon {
      width: 24px;
      height: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
  }
  .hamburger-icon span {
      width: 100%;
      height: 2px;
      background-color: var(--c-ink);
      border-radius: 2px;
      transition: transform 0.3s, opacity 0.3s;
  }
  body.nav-open .hamburger-icon span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
  body.nav-open .hamburger-icon span:nth-child(2) { opacity: 0; }
  body.nav-open .hamburger-icon span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

  .nav-menu {
    position: fixed;
    top: 0; right: -100%; /* Parte da fuori schermo */
    width: 70%;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    background-color: var(--c-glass);
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    transition: right var(--transition);
    font-size: 1.2rem;
  }
  body.nav-open .nav-menu {
    right: 0; /* Appare da destra */
  }

  /* --- Layout Generale --- */
  .hero { padding: 60px 0; }
  .hero__heart-container { width: 120px; height: 120px; }
  .countdown { gap: 10px; }
  .timebox { min-width: 70px; padding: 10px; }
  .timebox .num { font-size: 1.5rem; }

  .program-slot {
    grid-template-columns: 1fr; /* Una colonna */
    text-align: center;
    gap: 8px;
  }
  .slot-speaker { text-align: center; }

  .speakers__grid, .gallery__grid {
    grid-template-columns: 1fr; /* Una colonna */
    gap: 25px;
  }
  .speaker-card img { height: auto; aspect-ratio: 1/1; }

  .pdf-modal__header h3 { font-size: 0.9rem; }
}
/*
==============================================
--- STILI PAGINA ISCRIZIONE ---
==============================================
*/

/* Spaziatura per i blocchi di contenuto */
.content-block {
  padding: 25px 30px;
  margin-bottom: 40px;
}
.content-block h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 15px;
  color: var(--c-accent-secondary);
}

/* Wrapper responsive per video YouTube */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* Proporzioni 16:9 */
  height: 0;
  overflow: hidden;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--c-stroke);
}
.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Stili per il form (riutilizzando le variabili del tema) */
.iscrizione-form .form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.iscrizione-form .form-group {
  display: flex;
  flex-direction: column;
}
.iscrizione-form .form-group.full-width {
  grid-column: 1 / -1; /* Occupa tutta la larghezza */
}
.iscrizione-form label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-ink-muted);
  margin-bottom: 8px;
}
.iscrizione-form input[type="text"],
.iscrizione-form input[type="email"],
.iscrizione-form textarea {
  background-color: var(--c-bg);
  border: 1px solid var(--c-stroke);
  border-radius: 8px;
  padding: 12px 15px;
  font-family: var(--font-primary);
  color: var(--c-ink);
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.iscrizione-form input[type="text"]:focus,
.iscrizione-form input[type="email"]:focus,
.iscrizione-form textarea:focus {
  outline: none;
  border-color: var(--c-accent-secondary);
  box-shadow: 0 0 10px rgba(0, 169, 224, 0.3);
}
.iscrizione-form textarea {
  resize: vertical;
  min-height: 100px;
}
/* Aggiunge spazio tra i due bottoni nell'hero della home */
.hero-cta + .hero-cta {
  margin-top: 15px;
}

/* Responsive per il form */
@media (max-width: 768px) {
  .iscrizione-form .form-grid {
    grid-template-columns: 1fr; /* Una colonna su mobile */
  }
  .content-block {
    padding: 20px;
  }
}