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

body {
  font-family: 'Inter', sans-serif;
  background-color: #0D1B2A;
  color: #F5F5F5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
}

.collage {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.collage img {
  position: absolute;
  top: 0;
  left: -150px;
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
  opacity: 0.8;
  pointer-events: none;
  will-change: transform;
}

/* Kader */
.quiz-container {
  background-color: rgba(245,245,245,0.95);
  color: #0D1B2A;
  padding: 30px;
  border-radius: 12px;
  max-width: 600px;
  width: 90%;
  text-align: center;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

button {
  padding: 12px 24px;
  margin: 15px 5px 0 5px;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background-color: #0D1B2A;
  color: #F5F5F5;
  transition: 0.3s;
}
button:hover {
  background-color: #1B2A4D;
}
.option-btn.selected {
  border: 2px solid gold;
  background: rgba(255,215,0,0.2);
}

input[type="text"] {
  padding: 10px;
  width: 80%;
  margin-top: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

.hidden { display: none; }
.error { color: red; margin-top: 10px; }


@media (max-width: 768px) {
  .collage img { width: 60px; height: 60px; }
}
@media (max-width: 480px) {
  .collage img { width: 50px; height: 50px; }
}