body {
  background-image: linear-gradient(180deg, #eee, #fff 100px, #fff);
  font-family: 'Red Hat Display', sans-serif;
}

.app-shell {
  padding-bottom: 56px;
}

/* Desktop: phone-like centered container */
@media (min-width: 768px) {
  body {
    background-color: #e9ecef;
    background-image: none;
  }

  .app-shell {
    width: 430px;
    min-height: 100vh;
    margin: 0 auto;
    background-color: #fff;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow-x: hidden;
  }

  .app-shell .navbar {
    border-radius: 0 0 15px 15px;
  }

  .app-shell .fixed-bottom {
    position: fixed;
    bottom: 0;
    left: 50% !important;
    right: auto !important;
    transform: translateX(-50%);
    width: 430px;
    max-width: 430px;
    border-radius: 15px 15px 0 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1030;
  }
}

/* Mobile: full width (default behavior) */
@media (max-width: 767.98px) {
  .app-shell {
    width: 100%;
  }
}