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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0a15;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-shell {
  width: 450px;
  height: 950px;
  overflow: auto;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  border-radius: 20px;
  box-shadow: 0 0 40px rgba(233, 69, 96, 0.2);
}

.app-shell-white {
  width: 450px;
  height: 950px;
  overflow: hidden;
  background: #FFFFFF;
  border-radius: 40px;
  box-shadow: 0 25px 80px rgba(0,0,0,0.4);
}

@media (max-width: 480px) {
  body {
    align-items: flex-start;
    justify-content: flex-start;
  }
  
  .app-shell,
  .app-shell-white {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
    box-shadow: none;
  }
}