/* App shell */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding-top: env(safe-area-inset-top);
}

.app-header__inner {
  height: var(--header-h);
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.brand__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--green-400), var(--green-600));
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  box-shadow: var(--shadow-sm);
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.view {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 24px);
}

/* Tab bar */
.tab-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 10;
  backdrop-filter: saturate(1.2) blur(12px);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
}

.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: var(--tabbar-h);
  color: var(--muted);
  text-decoration: none;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: color .15s ease;
}

.tab:hover { text-decoration: none; }

.tab svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  transition: transform .15s ease;
}

.tab[aria-current="page"] {
  color: var(--green-600);
}

.tab[aria-current="page"] svg {
  transform: translateY(-1px) scale(1.05);
}

.tab:active svg { transform: scale(.92); }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 16px);
  transform: translate(-50%, 20px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: transform .25s ease, opacity .25s ease;
  z-index: 50;
  max-width: calc(100% - 32px);
  box-shadow: var(--shadow-lg);
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}