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

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: background-color var(--dur) ease, color var(--dur) ease;
}

#app {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
}

main#screen {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  scrollbar-width: none;
}
main#screen::-webkit-scrollbar { display: none; }

.screen {
  min-height: 100%;
  padding-top: calc(var(--safe-top) + var(--s-3));
  padding-bottom: calc(var(--tabbar-h) + var(--safe-bottom) + var(--s-7));
  animation: screen-in var(--dur) var(--ease-out);
}
.screen.no-tabbar { padding-bottom: calc(var(--safe-bottom) + var(--s-7)); }
.screen:has(> .topbar) { padding-top: 0; }

@keyframes screen-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

h1, h2, h3, h4, .display {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1.12;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0; }

a { color: inherit; text-decoration: none; }
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  touch-action: manipulation;
}
button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
input, select, textarea {
  font: inherit;
  color: inherit;
}
img { display: block; max-width: 100%; }
ul { list-style: none; margin: 0; padding: 0; }

/* text helpers */
.micro {
  font-size: var(--fs-micro);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-2);
}
.micro.accent { color: var(--accent); }
.small { font-size: var(--fs-small); }
.muted { color: var(--text-2); }
.faint { color: var(--text-3); }
.serif { font-family: var(--font-display); }
.price { font-family: var(--font-display); font-weight: 500; letter-spacing: 0; }
.price .was { color: var(--text-3); text-decoration: line-through; margin-left: 6px; font-size: 0.85em; }
.price .sale { color: var(--accent); }
.gutter { padding-left: var(--gutter); padding-right: var(--gutter); }
.hairline { height: 1px; background: var(--hairline); border: 0; margin: 0; }
.row { display: flex; align-items: center; gap: var(--s-3); }
.row.between { justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: var(--s-3); }
.center { text-align: center; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hidden { display: none !important; }

/* page header */
.page-head {
  padding: var(--s-4) var(--gutter) var(--s-4);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s-3);
}
.page-head h1 { font-size: var(--fs-h1); }
.page-head .eyebrow { display: block; margin-bottom: var(--s-2); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: var(--s-6) var(--gutter) var(--s-3);
}
.section-head h2 { font-size: var(--fs-h3); }
.section-head .link { font-size: var(--fs-small); color: var(--text-2); }

/* top bar for pushed screens */
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  padding: calc(var(--safe-top) + var(--s-2)) var(--s-3) var(--s-2);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  backdrop-filter: saturate(160%) blur(18px);
}
.topbar.over { position: absolute; left: 0; right: 0; background: none; backdrop-filter: none; -webkit-backdrop-filter: none; }
.topbar .title { font-family: var(--font-display); font-size: var(--fs-lead); text-align: center; flex: 1; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}