/* css/base.css — reset, page frame, layout primitives. */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(var(--dot) 1.1px, transparent 1.1px);
  background-size: 18px 18px;
  overscroll-behavior-y: none;
  touch-action: manipulation;
  padding-bottom: calc(84px + env(safe-area-inset-bottom));
}

h1, h2, h3, h4, p, figure { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--blue-deep); }

:focus-visible {
  outline: 3px dashed var(--blue-deep);
  outline-offset: 3px;
}

img, svg { max-width: 100%; }

/* layout primitives */
.stack { display: flex; flex-direction: column; gap: var(--s3); }
.stack--lg { gap: var(--s5); }
.row { display: flex; align-items: center; gap: var(--s2); }
.row--between { justify-content: space-between; }
.row--wrap { flex-wrap: wrap; }
.grow { flex: 1 1 auto; min-width: 0; }
.center { display: grid; place-items: center; }
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-faint); }
.small { font-size: var(--fs-sm); }
.xs { font-size: var(--fs-xs); }
.bold { font-weight: 800; }
.display { font-family: var(--font-display); }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* app frame */
#app {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--s4) var(--s4) var(--s6);
  padding-left: max(var(--s4), env(safe-area-inset-left));
  padding-right: max(var(--s4), env(safe-area-inset-right));
}

.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s3);
  margin: var(--s2) 0 var(--s4);
}

.page-title {
  font-size: var(--fs-xl);
  font-weight: 900;
  letter-spacing: -0.5px;
  line-height: 1.15;
}

.page-sub { font-size: var(--fs-sm); color: var(--ink-soft); }

/* heading with marker highlight */
.marked {
  position: relative;
  display: inline-block;
  z-index: 0;
}
.marked::after {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: 2px;
  height: 0.42em;
  background: var(--yellow);
  z-index: -1;
  transform: rotate(-0.6deg);
  border-radius: 3px;
}

@media (min-width: 900px) {
  body { padding-bottom: var(--s6); padding-left: 108px; }
  #app { padding: var(--s6) var(--s5); }
  .page-title { font-size: var(--fs-2xl); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}