.header {
  position: relative;
  width: 100%;
  height: 30vh; /* vagy pl. 50vh, hogy rugalmas legyen. vh = viewport height, tehát az ablak magasságához igazodik. */
  overflow: hidden;
}

/* ez a trükk: az iframe "cover" mód */
.video-background {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 100vw;
  min-height: 100%;
  min-width: 100%;
  transform: translate(-50%, -50%);
  overflow: hidden;
}

.video-background iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: none;
}

.header-content {
  position: relative;
  z-index: 1;
  color: white;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: 0 5vw;
  text-shadow: 0 0 clamp(5px, 1vw, 12px) rgba(0,0,0,0.7);
}

.header-content h1 {
    font-family: Arial, sans-serif;
  font-size: clamp(2rem, 5vw, 4rem); /* min 2rem, max 4rem, közben arányosan nő */
  margin: 0;
  line-height: 1.1; /* line-height: 1.1 */
} 


.header-content h2 {
    font-family: Arial, sans-serif;
  font-size: clamp(1.2rem, 3vw, 2.5rem);
  color: #ffffff !important;
  margin: clamp(5px, 1.5vw, 15px) 0 0 0;
  line-height: 1.2; /* line-height: 1.2 */
} 

nav a {
  color: white;
  text-decoration: none;
  margin: 0 clamp(5px, 2vw, 20px);
  font-weight: bold;
  font-size: clamp(0.9rem, 2vw, 1.2rem);
  transition: text-shadow 0.3s ease;
}

nav a:hover {
  text-shadow: 0 0 clamp(5px, 1vw, 12px) white;
}
    body {
      font-family: Arial, sans-serif;
      font-size: 15px;
      line-height: 1.8; /* ízléses sorköz */
      color: #222;
      margin: 20px;
    }

      .link-button {
  display: inline-block;
  background-color: #ebf6ff;
  color: grey;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease;
}
.link-button:hover {
  background-color: #005fa3;
}
     
      
    .about-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 30px;
    }

    .column {
      flex: 1 1 45%;
      text-align: justify;
    }

    h2 {
      text-align: center;
      font-size: 1.2em;
      margin-bottom: 15px;
      color: #444;
    }

    p {
      margin-bottom: 1em;
    }

footer {
  text-align: center;
  padding: 0.2em 0.4em;
  background: #eee;
  color: #555;
}

    /* Mobil nézetre */
    @media (max-width: 800px) {
      .column {
        flex: 1 1 100%;
      }
    }
      
    .image-double {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}

.image-frame {
  flex: 1 1 100%;
  max-width: 500px;
  text-align: center;
}

.image-frame iframe {
  width: 100%;
  aspect-ratio: 4 / 3; /* arány megtartása */
  border: none;
  border-radius: 8px;
  overflow: hidden;
}

.image-caption {
  font-size: 0.9rem;
  color: #555;
  font-style: italic;
  margin-top: 8px;
}