*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body.app-shell {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
  min-height: 100dvh;
  padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
  transition: background-color 0.15s ease, color 0.15s ease;
}

.top-bar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 16px 8px;
  max-width: 720px;
  margin: 0 auto;
}

.app-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 650;
}

.load-line {
  margin: 0 16px 8px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  font-size: 0.88rem;
  color: var(--note);
}

.tab-panels {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px 24px;
}

.tab-panel[hidden] {
  display: none !important;
}

.tab-panel {
  animation: fadeIn 0.18s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.tabbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 6px 8px calc(8px + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--bg) 92%, var(--border));
  border-top: 1px solid var(--border);
  max-width: 720px;
  margin: 0 auto;
}

.admin-shell .tabbar {
  grid-template-columns: repeat(5, 1fr);
}

.tabbar__btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.78rem;
  padding: 8px 4px;
  cursor: pointer;
  border-radius: 8px;
}

.tabbar__btn.is-active {
  color: var(--accent);
  font-weight: 650;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
}

.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 8px 16px 88px;
  font-size: 0.8rem;
  color: var(--muted);
}

.site-footer a {
  color: var(--note);
}

.chart-box {
  min-height: 220px;
  margin: 12px 0;
}

@media (min-width: 900px) {
  .tab-panels {
    padding-bottom: 32px;
  }
}