body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #0f0f0f, #1a1a1a);
  color: white;
  opacity: 0;
  animation: pageLoad 0.5s ease forwards;
}

@keyframes pageLoad {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* HEADER */
header {
  text-align: center;
  font-size: 30px;
  font-weight: bold;
  padding: 20px;
}

/* NAV */
nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  padding-bottom: 10px;
}

nav a {
  text-decoration: none;
  color: white;
  background: rgba(255,255,255,0.08);
  padding: 10px 16px;
  border-radius: 12px;
  transition: 0.3s;
}

nav a:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,0.2);
}

/* AKTIVNÍ STRÁNKA */
nav a.active {
  background: #4caf50;
  transform: translateY(-6px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.5);
}

/* 🔥 HLAVNÍ KONTEJNER FOTEK */
.photos {
  max-width: 1100px;
  margin: 20px auto;
  padding: 10px;

  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

/* FOTKY */
.photos img {
  width: 80%;
  height: 350px;
  object-fit: cover; /* důležité → žádné divné prázdno */
  border-radius: 16px;
  cursor: pointer;
  transition: 0.3s;
}

.photos img:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

/* TEXT BOX */
.content {
  max-width: 900px;
  margin: 30px auto;
  padding: 0 20px;
}

.card {
  background: rgba(255,255,255,0.06);
  padding: 20px;
  border-radius: 16px;
  line-height: 1.5;
}

/* LIGHTBOX */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 10px;
}