.app-shell {
  position: relative;
  width: 100%;
  max-width: var(--shell-max);
  min-height: 100vh;
  margin: 0 auto;
  overflow: hidden;
  background:
    linear-gradient(var(--paper-light), var(--paper) 240px),
    var(--paper);
  box-shadow: 0 0 0 1px rgba(184, 170, 142, 0.35), 0 24px 60px rgba(34, 36, 30, 0.08);
}

.app-atmosphere {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-position: center;
  background-size: cover;
  filter: blur(6px) saturate(1);
  opacity: 0.7;
  transform: scale(1.03);
  pointer-events: none;
}

.app-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(250, 246, 236, 0.55);
}

.app-main {
  position: relative;
  z-index: 1;
  padding: 0 18px 108px;
}

.bottom-nav {
  position: fixed;
  bottom: calc(12px + env(safe-area-inset-bottom));
  left: 50%;
  z-index: 30;
  width: auto;
  min-width: 360px;
  max-width: calc(100vw - 24px);
  height: 58px;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: repeat(5, minmax(56px, 1fr));
  align-items: center;
  gap: 4px;
  padding: 7px 10px;
  border: 1px solid rgba(184, 170, 142, 0.35);
  border-radius: 18px;
  background: rgba(250, 246, 236, 0.72);
  box-shadow: 0 10px 30px rgba(34, 36, 30, 0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.bottom-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 0;
  color: var(--ink-muted);
  font-size: var(--text-micro);
  line-height: 1.2;
}

.bottom-nav a .icon {
  width: 22px;
  height: 22px;
}

.bottom-nav a.is-active {
  border-radius: 999px;
  background: rgba(157, 64, 48, 0.1);
  color: var(--cinnabar);
}

.bottom-nav a.is-active::before {
  display: none;
}

.bottom-nav a {
  position: relative;
}

@media (min-width: 720px) {
  .app-main {
    padding-left: 26px;
    padding-right: 26px;
  }
}