/* Genel yapı */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f0f2f5;
}

/* Üst başlık */
header {
  background-color: #1a237e;
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}

header input {
  margin-top: 1rem;
  padding: 0.5rem;
  font-size: 1rem;
  width: 90%;
  max-width: 400px;
  border: none;
  border-radius: 5px;
}

/* Video listesi alanı */
main {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 2rem;
  gap: 1rem;
}

/* Video kartı */
.video-karti {
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 1rem;
  width: 300px;
  max-width: 100%;
  box-sizing: border-box;
}

.video-karti iframe {
  width: 100%;
  height: 170px;
  border: none;
}

/* Alt bilgi */
footer {
  text-align: center;
  padding: 1rem;
  background-color: #e8eaf6;
  color: #333;
}

/* Mobil uyum: küçük ekranlarda padding azalt */
@media (max-width: 600px) {
  header {
    padding: 1rem 0.5rem;
  }

  main {
    padding: 1rem;
  }

  .video-karti {
    width: 100%;
  }

  header input {
    width: 100%;
  }
}