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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  padding: 40px;
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.header {
  margin-bottom: 30px;
}

.header h1 {
  color: #333;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 10px;
}

.header p {
  color: #666;
  font-size: 16px;
}

.app-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto 30px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.download-btn {
  background: linear-gradient(135deg, #00a8ff 0%, #0097e6 100%);
  color: white;
  border: none;
  border-radius: 15px;
  padding: 18px 30px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
  margin-bottom: 15px;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 168, 255, 0.3);
}

.download-btn:active {
  transform: translateY(0);
}

.version {
  color: white;
  font-size: 14px;
  margin-top: 5px;
}

/* iOS 버튼 스타일 (주석 해제 시 사용) */
.download-btn.ios {
  background: linear-gradient(135deg, #000 0%, #333 100%);
}

.download-btn.ios:hover {
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.platform-grid {
  display: grid;
  gap: 15px;
}

/* iOS 추가 시 사용할 그리드 레이아웃 */
.platform-grid.two-columns {
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 480px) {
  .container {
    padding: 30px 20px;
  }

  .header h1 {
    font-size: 24px;
  }

  .app-icon {
    width: 100px;
    height: 100px;
  }
}