/* ==========================================================================
   Reset + element defaults.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-md); }

p { margin: 0 0 var(--sp-3); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--accent-hover); }

ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { cursor: pointer; }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--sp-6) 0;
}

code, kbd, pre { font-family: var(--font-mono); font-size: 0.9em; }

kbd {
  display: inline-block;
  padding: 0.1em 0.4em;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: var(--radius-xs);
  background: var(--surface-2);
  font-size: var(--text-xs);
  color: var(--ink-soft);
}

/* --- Focus --------------------------------------------------------------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* --- Scrollbars ---------------------------------------------------------- */
* { scrollbar-color: var(--line-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 3px solid transparent;
  background-clip: content-box;
  border-radius: var(--radius-pill);
}
*::-webkit-scrollbar-thumb:hover { background-color: var(--ink-faint); background-clip: content-box; }

/* --- Utilities ----------------------------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--sp-2);
  top: -4rem;
  z-index: 200;
  padding: var(--sp-2) var(--sp-4);
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--sp-2); color: var(--accent-ink); }
.skip-link:focus-visible { outline-color: var(--accent-ink); }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.muted { color: var(--ink-muted); }
.faint { color: var(--ink-faint); }
.small { font-size: var(--text-sm); }
.serif { font-family: var(--font-serif); }
.nowrap { white-space: nowrap; }
.stack { display: flex; flex-direction: column; gap: var(--sp-3); }
.row { display: flex; align-items: center; gap: var(--sp-2); }
.row-wrap { display: flex; align-items: center; gap: var(--sp-2); flex-wrap: wrap; }
.spacer { flex: 1 1 auto; }
.text-right { text-align: right; }

/* --- Boot screen --------------------------------------------------------- */
.boot {
  min-height: 100dvh;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: var(--sp-4);
  color: var(--ink-muted);
  text-align: center;
  padding: var(--sp-6);
}
.boot-mark {
  width: 3.25rem; height: 3.25rem;
  display: grid; place-items: center;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  color: var(--accent-soft-ink);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  letter-spacing: 0.04em;
}
.boot-error { color: var(--danger); max-width: 34rem; }

/* --- Motion preferences -------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}