:root {
  --bg: #020617;
  --bg2: #071a2f;
  --blue: #38bdf8;
  --blue2: #7dd3fc;
  --white: #ffffff;
  --soft: #dbeafe;
  --muted: #93c5fd;
  --glass: rgba(255, 255, 255, 0.08);
  --line: rgba(125, 211, 252, 0.25);
  --shadow: rgba(56, 189, 248, 0.28);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--white);
  background:
    radial-gradient(circle at top left, rgba(0, 195, 255, 0.28), transparent 35%),
    radial-gradient(circle at bottom right, rgba(0, 80, 180, 0.35), transparent 40%),
    linear-gradient(135deg, var(--bg), var(--bg2), #002b45);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.site-bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(125, 211, 252, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 211, 252, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent);
  z-index: -1;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 18px 7%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.logo {
  text-decoration: none;
  display: inline-block;
}

.logo-main {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--blue2);
  text-shadow: 0 0 18px var(--blue);
}

.logo-sub {
  display: block;
  font-size: 0.78rem;
  color: var(--soft);
  margin-top: 2px;
  letter-spacing: 1px;
}

.nav {
  display: flex;
  gap: 18px;
  align-items: center;
}

.nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--soft);
  opacity: 0.9;
}

.nav a:hover,
.nav a.active {
  color: var(--blue2);
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: var(--glass);
  color: white;
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
}

.hero {
  min-height: 86vh;
  padding: 80px 7%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.eyebrow {
  color: var(--blue2);
  letter-spacing: 3px;
  text-transform: uppercase;
  font-size: 0.86rem;
  margin-bottom: 18px;
}

.hero h1,
.page-hero h1 {
  font-size: clamp(2.8rem, 7vw, 6.4rem);
  line-height: 0.96;
  margin-bottom: 26px;
}

.hero h1 span,
.page-hero h1 span {
  color: var(--blue2);
  text-shadow: 0 0 24px rgba(125, 211, 252, 0.9);
}

.hero p,
.page-hero p,
.section-lead {
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--soft);
  max-width: 760px;
}

.buttons {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 14px 24px;
  border-radius: 999px;
  color: #00111f;
  background: linear-gradient(135deg, var(--blue2), white);
  font-weight: 800;
  box-shadow: 0 0 28px rgba(125, 211, 252, 0.42);
}

.btn.secondary {
  color: white;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(125,211,252,0.45);
}

.holo-card,
.glass-card {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: 0 0 60px rgba(56, 189, 248, 0.18);
  backdrop-filter: blur(18px);
}

.holo-card {
  padding: 20px;
}

.island-visual {
  min-height: 430px;
  border-radius: 24px;
  background:
    linear-gradient(to top, rgba(0,0,0,0.76), transparent),
    linear-gradient(135deg, rgba(56,189,248,0.25), rgba(255,255,255,0.06)),
    url("https://images.unsplash.com/photo-1533105079780-92b9be482077?auto=format&fit=crop&w=1200&q=80");
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.island-visual::after {
  content: "KASTOS · GREECE";
  position: absolute;
  left: 24px;
  bottom: 24px;
  letter-spacing: 3px;
  font-weight: 800;
}

.badge {
  position: absolute;
  top: 22px;
  right: 22px;
  background: rgba(2,6,23,0.7);
  border: 1px solid rgba(125,211,252,0.5);
  color: #bae6fd;
  padding: 12px 16px;
  border-radius: 999px;
}

.section {
  padding: 70px 7%;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.4rem);
  margin-bottom: 18px;
}

.grid-3,
.grid-4,
.gallery-grid,
.video-grid {
  display: grid;
  gap: 22px;
  margin-top: 34px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.gallery-grid {
  grid-template-columns: repeat(3, 1fr);
}

.video-grid {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  padding: 28px;
  min-height: 210px;
}

.card h3 {
  color: var(--blue2);
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.card p {
  color: var(--soft);
  line-height: 1.65;
}

.photo-card,
.video-card {
  overflow: hidden;
}

.photo-placeholder,
.video-placeholder {
  height: 260px;
  border-radius: 24px 24px 0 0;
  background:
    linear-gradient(135deg, rgba(56,189,248,0.7), rgba(14,165,233,0.25)),
    radial-gradient(circle at center, rgba(255,255,255,0.35), transparent 34%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  letter-spacing: 2px;
  text-align: center;
  padding: 20px;
}

.photo-card .caption,
.video-card .caption {
  padding: 22px;
}

.caption h3 {
  color: var(--blue2);
  margin-bottom: 8px;
}

.caption p {
  color: var(--soft);
  line-height: 1.5;
}

.page-hero {
  padding: 90px 7% 50px;
}

.content-box {
  padding: 34px;
  max-width: 1000px;
}

.content-box p {
  color: var(--soft);
  line-height: 1.8;
  margin-bottom: 18px;
}

.timeline {
  display: grid;
  gap: 22px;
  margin-top: 34px;
  max-width: 950px;
}

.timeline-item {
  padding: 28px;
  border-left: 4px solid var(--blue2);
  border-radius: 0 24px 24px 0;
}

.timeline-item h3 {
  color: var(--blue2);
  margin-bottom: 10px;
}

.timeline-item p {
  color: var(--soft);
  line-height: 1.7;
}

.form {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.form input,
.form textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.08);
  color: white;
  font-size: 1rem;
}

.form textarea {
  min-height: 150px;
  resize: vertical;
}

.form button {
  border: none;
  cursor: pointer;
  justify-self: start;
}

.footer {
  padding: 36px 7%;
  text-align: center;
  color: #bfdbfe;
  border-top: 1px solid rgba(125,211,252,0.18);
  background: rgba(2,6,23,0.55);
}

.note {
  margin-top: 20px;
  padding: 18px;
  border-radius: 18px;
  background: rgba(14,165,233,0.12);
  border: 1px solid rgba(125,211,252,0.25);
  color: var(--soft);
  line-height: 1.7;
}

@media (max-width: 1050px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid-4,
  .grid-3,
  .gallery-grid,
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  .header {
    align-items: flex-start;
  }

  .menu-btn {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    top: 78px;
    left: 7%;
    right: 7%;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(2,6,23,0.96);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 18px;
  }

  .nav.open {
    display: flex;
  }

  .hero,
  .page-hero,
  .section {
    padding-left: 6%;
    padding-right: 6%;
  }

  .grid-4,
  .grid-3,
  .gallery-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .island-visual {
    min-height: 310px;
  }

  .photo-placeholder,
  .video-placeholder {
    height: 220px;
  }
}