/* 1) RESET */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
}

/* 2) BODY & ARKA PLAN */
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
}

/* 3) BACKGROUND IMAGE */
.background {
  position: fixed;
  inset: 0;
  background: url('../img/deadend.jpg') no-repeat center center;
  background-size: cover;
  z-index: 0;
}

/* 4) DARK OVERLAY */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1;
}

/* 5) MESAJ KONTEYNERİ */
.message-container {
  position: relative;
  z-index: 2;
  width: 90%;
  max-width: 400px;
  margin: 0 auto;
  top: 50%;
  transform: translateY(-50%);
  text-align: center;
  color: #f5f5f5;
  padding: 20px;
}

/* 6) BAŞLIK ve METİN */
.message-container h1 {
  font-size: 3rem;
  margin-bottom: 10px;
}
.message-container p {
  font-size: 1.2rem;
  margin-bottom: 20px;
}

/* 7) BUTON */
.message-container button {
  padding: 12px 24px;
  background: #e30a17;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.message-container button:hover {
  background: #c20914;
}

/* 8) RESPONSIVE */
@media (max-width: 480px) {
  .message-container h1 {
    font-size: 2.5rem;
  }
  .message-container p {
    font-size: 1rem;
  }
  .message-container button {
    width: 100%;
    box-sizing: border-box;
  }
}