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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #640a7a 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

.header {
  text-align: center;
  color: white;
  margin-bottom: 20px;
}

.controls {
  display: flex;
  gap: 15px;
  margin-top: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 25px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-primary {
  background: linear-gradient(45deg, #ff6b6b, #ff8e53);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
}

.btn-secondary {
  background: linear-gradient(45deg, #4ecdc4, #44a08d);
  color: white;
  box-shadow: 0 4px 15px rgba(78, 205, 196, 0.4);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(78, 205, 196, 0.6);
}

/* Poster alanı */
.poster-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 20px;
  width: 100%;
  max-width: 720px;
  flex: 1;
}

.poster img {
  max-width: 100%;
  max-height: 80vh; /* dikey ekrana sığdırır */
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

/* Navigation */
.navigation {
  display: flex;
  gap: 20px;
  align-items: center;
  color: white;
  font-size: 18px;
  margin-top: 20px;
  justify-content: center;
}

.nav-btn {
  padding: 10px 20px;
  border: 2px solid white;
  background: transparent;
  color: white;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 16px;
}

.nav-btn:hover {
  background: white;
  color: #667eea;
}

.nav-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.nav-btn:disabled:hover {
  background: transparent;
  color: white;
}

.poster-counter {
  background: rgba(255, 255, 255, 0.2);
  padding: 8px 16px;
  border-radius: 20px;
  backdrop-filter: blur(10px);
}

/* Progress bar */
.progress-bar {
  width: 720px;
  height: 8px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 20px;
}

.progress {
  height: 100%;
  background: linear-gradient(45deg, #ff6b6b, #ff8e53);
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* Responsive */
@media (max-width: 600px) {
  .poster-container {
    width: 90vw;
  }

  .poster img {
    max-height: 60vh;
  }

  .controls {
    flex-direction: column;
    align-items: center;
  }

  .progress-bar {
    width: 90vw;
  }
}
/* Tam ekran modal */
.fullscreen-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  justify-content: center;
  align-items: center;
  z-index: 9999;
  cursor: zoom-out;
}

.fullscreen-overlay img {
  max-width: 95%;
  max-height: 95%;
  object-fit: contain;
  border-radius: 8px;
}