@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&display=swap');

:root {
  --bg: #05030a;
  --accent: #00eaff;
  --accent2: #ff00ff;
  --card-bg: rgba(10, 10, 25, 0.88);
  --border: rgba(255,255,255,0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: radial-gradient(circle at top, #1a1035 0, #05030a 55%, #000000 100%);
  color: #ffffff;
  letter-spacing: 0.2px;
}

/* ---------------- HEADER ---------------- */

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(5,5,15,0.75);
  backdrop-filter: blur(18px);
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  height: 110px;
}

header .left-header {
  display: flex;
  align-items: center;
  gap: 22px;
  height: 100%;
}

.logo-slot {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.main-logo-img {
  height: 95px;
  width: auto;
  object-fit: contain;
  display: block;
  filter: brightness(0) invert(1);
}

.header-sponsors {
  display: flex;
  gap: 12px;
}

.header-sponsor-logo {
  width: 75px;
  height: 45px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  color: white;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.85;
  transition: 0.2s;
}

.header-sponsor-logo:hover {
  transform: translateY(-2px);
  opacity: 1;
}

nav a {
  color: #eaeaea;
  margin-left: 28px;
  text-decoration: none;
  font-weight: 500;
  transition: 0.25s;
  position: relative;
}

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

nav a::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: 0.25s;
}

nav a:hover::after {
  width: 100%;
}

/* ---------------- HERO ---------------- */

.hero {
  height: 88vh;
  background: url('https://applescoop.org/image/wallpapers/mac/hyperspace-speed-purple-dark-8k-ultra-hd-ultra-hd-computer-desktop-image-screensavers-wallpapers-backgrounds-backdrops-display-image-theme-4k-mac-and-pc-15-03-2025-1742078790-hd-wallpaper.jpg') center/cover no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 110px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(0,0,0,0.6), rgba(0,0,0,0.95));
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 0 20px;
}

.hero h1 {
  font-size: 4.8rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 10px;
  background: linear-gradient(135deg, #ffffff 0%, #00eaff 50%, #ff00ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 18px rgba(0, 234, 255, 0.8)) drop-shadow(0 0 40px rgba(255, 0, 255, 0.5));
}

.hero h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 20px;
  /* FIX: era un gradient trasparente, ora leggibile */
  color: #c8f4ff;
  filter: drop-shadow(0 0 10px rgba(0, 234, 255, 0.5));
}

/* FIX: era color: transparent, ora visibile */
.hero p {
  font-size: 1.05rem;
  color: #d8d8d8;
  margin-bottom: 18px;
  line-height: 1.7;
}

.hero p strong {
  color: #ffffff;
}

/* GRATUITO in evidenza */
.hero-gratuito {
  color: var(--accent);
  font-weight: 800;
  text-shadow: 0 0 12px rgba(0, 234, 255, 0.8);
}

.cta-btn {
  padding: 15px 34px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border: none;
  border-radius: 999px;
  color: white;
  font-size: 1.08rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 0 25px rgba(0, 234, 255, 0.45);
  transition: 0.25s;
}

.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(0, 234, 255, 0.85);
}

/* ---------------- MAIN ---------------- */

main {
  padding: 40px 40px 70px;
  max-width: 1200px;
  margin: auto;
}

.main-layout {
  display: grid;
  grid-template-columns: 330px 1fr;
  gap: 30px;
  align-items: start;
}

.sidebar-contacts {
  position: sticky;
  top: 130px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 8px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
}

.main-content {
  margin-top: 0;
  padding-top: 0;
}

.main-content .card:first-child {
  margin-top: 0;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 28px;
  border-radius: 18px;
  margin-bottom: 32px;
  box-shadow: 0 10px 35px rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  transition: 0.25s;
}

.card:hover {
  border-color: rgba(0,234,255,0.35);
  box-shadow: 0 0 35px rgba(0,234,255,0.12);
}

.card h2 {
  margin-top: 0;
  font-size: 1.7rem;
  margin-bottom: 15px;
}

.card p {
  color: #d6d6d6;
  line-height: 1.7;
}

ul {
  list-style: none;
  padding: 0;
}

ul li {
  padding: 7px 0;
  color: #d2d2d2;
}

/* ---------------- ORGANIZZATORI ---------------- */

.organizer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 25px;
}

.organizer-card {
  background: rgba(15, 10, 35, 0.95);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 18px;
  border-radius: 16px;
  transition: 0.25s;
  box-shadow: 0 0 20px rgba(0,0,0,0.7);
  display: flex;
  gap: 16px;
  align-items: center;
}

.organizer-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(0,234,255,0.4);
}

/* FIX: background-image rimosso dal CSS, ogni card ha il suo URL inline */
.organizer-photo {
  width: 110px;
  height: 110px;
  background-color: rgba(255,255,255,0.08);
  background-size: cover;
  background-position: center;
  border-radius: 12px;
  flex-shrink: 0;
}

.organizer-card h4 {
  margin: 5px 0;
  font-size: 18px;
}

.role {
  color: var(--accent);
  font-size: 14px;
}

/* ---------------- FORM ---------------- */

form {
  display: flex;
  flex-direction: column;
  max-width: 480px;
}

input, textarea {
  padding: 13px;
  margin-bottom: 16px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.06);
  color: white;
  font-family: 'Inter';
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0,234,255,0.3);
}

textarea {
  height: 140px;
}

button {
  padding: 13px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border: none;
  border-radius: 999px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: 0.25s;
  box-shadow: 0 0 20px rgba(0,234,255,0.5);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0,234,255,0.9);
}

/* ---------------- SPONSOR ---------------- */

.sponsor-section {
  display: grid;
  gap: 28px;
}

.sponsor-tier {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 22px;
  border: 1px solid var(--border);
}

.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.sponsor-card {
  background: rgba(10, 10, 30, 0.95);
  border-radius: 14px;
  padding: 15px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.15);
  transition: 0.25s;
}

.sponsor-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 25px rgba(0,234,255,0.25);
}

.sponsor-logo {
  width: 100%;
  height: 90px;
  background: white;
  border-radius: 10px;
  margin-bottom: 10px;
}

.gold {
  border-color: #ffd700;
  box-shadow: 0 0 18px rgba(255, 215, 0, 0.25);
}

.silver {
  border-color: #c0c0c0;
  box-shadow: 0 0 18px rgba(192, 192, 192, 0.25);
}

.bronze {
  border-color: #cd7f32;
  box-shadow: 0 0 18px rgba(205, 127, 50, 0.25);
}

/* ---------------- RESPONSIVE ---------------- */

@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  .sidebar-contacts {
    position: static;
  }
}

@media (max-width: 700px) {
  header {
    flex-direction: column;
    height: auto;
    gap: 12px;
    padding: 12px 20px;
  }

  header .left-header {
    height: auto;
  }

  .main-logo-img {
    height: 55px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  main {
    padding: 130px 20px 50px;
  }

  .organizer-card {
    flex-direction: column;
    align-items: flex-start;
  }
}FF