* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, Arial, sans-serif;
  color: #ffffff;
  background:
    linear-gradient(
      rgba(0,0,0,0.10),
      rgba(0,0,0,0.22)
    ),
    url("../img/background/desk.png") center / cover no-repeat;
}

/* =========================
   HEADER CENTRADO
========================= */

header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 40px 20px 30px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
  box-shadow: 0 10px 30px rgba(0,255,255,0.15);
}

header h1 {
  margin: 0;
  font-size: 2.6rem;
  color: #00ffff;
  text-shadow: 0 0 10px #00ffff;
}

/* =========================
   NAV
========================= */

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
}

nav a {
  color: #ffffff;
  text-decoration: none;
  font-size: 1.05rem;
  opacity: 0.85;
  transition: color 0.2s ease, opacity 0.2s ease;
}

nav a:hover {
  color: #00ffff;
  opacity: 1;
}

/* =========================
   MAIN CONTENT
========================= */

main {
  padding: 60px 20px;
}

.section-box {
  max-width: 900px;
  margin: auto;
  background: rgba(0,0,0,0.5);
  padding: 30px 35px;
  border-radius: 16px;
  box-shadow: 0 0 20px rgba(0,255,255,0.12);
}

.section-box p {
  font-size: 1.1rem;
  line-height: 1.6;
}

.section-box li {
  padding: 12px 0;
}

.section-box li strong {
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  margin-left: 6px;
}

/* GALLERY GRID */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.gallery-grid img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 0 15px rgba(0,0,0,0.4);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: 0 0 25px rgba(0,255,255,0.35);
}