/* Ovillo site base: palette, type, header, button, footer and reading pages. The palette, serif and mark are the app's own.
   Charter ships with every Mac, so no web fonts are loaded. */
:root {
  --paper: #f3efe5;
  --paper-light: #fbf9f3;
  --paper-deep: #e7e0d2;
  --ink: #153d3c;
  --ink-soft: #496461;
  --line: #c9c3b5;
  --accent: #a94734;
  --band: #153d3c;
  --band-text: #f3efe5;
  --band-soft: #b9cbc6;
  --button: #153d3c;
  --button-text: #fbf9f3;
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --measure: 62ch;
  --wide: 1120px;
  --step--1: .875rem;
  --step-0: 1.0625rem;
  --step-1: 1.3rem;
  --step-2: clamp(1.6rem, 1.2rem + 1.6vw, 2.2rem);
  --step-3: clamp(2.2rem, 1.4rem + 3.4vw, 3.6rem);
  --section: 96px;
  --ease: cubic-bezier(0.23, 1, 0.32, 1);
  --lift: 0 1px 2px rgba(0, 0, 0, .05), 0 12px 32px rgba(0, 0, 0, .08);
  --outline: rgba(0, 0, 0, .1);
  color-scheme: light;
}
@media (max-width: 760px) { :root { --section: 64px; } }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --outline: rgba(255, 255, 255, .1);
    --paper: #0f2627; --paper-light: #153233; --paper-deep: #1c3d3e; --ink: #ecf1ec; --ink-soft: #a9bfbb; --line: #2f5050;
    --accent: #e3917b; --band: #0a1c1d; --band-text: #ecf1ec; --band-soft: #a9bfbb; --button: #ecf1ec; --button-text: #0f2627; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
    --outline: rgba(255, 255, 255, .1);
  --paper: #0f2627; --paper-light: #153233; --paper-deep: #1c3d3e; --ink: #ecf1ec; --ink-soft: #a9bfbb; --line: #2f5050;
  --accent: #e3917b; --band: #0a1c1d; --band-text: #ecf1ec; --band-soft: #a9bfbb; --button: #ecf1ec; --button-text: #0f2627; color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
::selection { background: color-mix(in srgb, var(--accent) 22%, transparent); color: var(--ink); }
html { scrollbar-color: color-mix(in srgb, var(--ink-soft) 60%, transparent) var(--paper); accent-color: var(--ink); caret-color: var(--accent); }
body { margin: 0; overflow-wrap: break-word; background: var(--paper); color: var(--ink); font: 400 var(--step-0)/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -.02em; line-height: 1.08; margin: 0; text-wrap: balance; }
h1 { font-size: var(--step-3); }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); line-height: 1.25; letter-spacing: 0; }
p { margin: 0; text-wrap: pretty; }
.wrap { max-width: var(--wide); margin-inline: auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
.skip { position: absolute; left: 12px; top: -60px; background: var(--button); color: var(--button-text); padding: 10px 14px; border-radius: 8px; z-index: 50; }
.skip:focus { top: 12px; }
[id] { scroll-margin-top: 80px; }
[tabindex="-1"]:focus { outline: none; }

/* header */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 24px; padding-block: 12px; }
.brand { display: flex; align-items: center; gap: 10px; padding-block: 5px; margin-block: -5px; text-decoration: none; font: 600 1.25rem/1 var(--serif); letter-spacing: -.01em; }
.brand svg { width: 34px; height: 34px; flex: none; }
.nav { display: flex; gap: 12px; margin-left: auto; font-size: var(--step--1); }
.nav a { text-decoration: none; color: var(--ink-soft); padding: 10px 4px; }
.nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 20px; border-radius: 10px; font: 600 1rem/1.2 var(--sans); text-decoration: none; border: 1px solid var(--button); background: var(--button); color: var(--button-text); cursor: pointer; transition: transform 160ms var(--ease), background-color 160ms var(--ease), border-color 160ms var(--ease); }

.btn:active { transform: scale(.96); }

.btn.quiet { background: transparent; color: var(--ink); border-color: var(--line); }

.btn svg { width: 18px; height: 18px; }
.top .btn { min-height: 36px; padding: 8px 16px; font-size: .9375rem; border-radius: 8px; }
@media (max-width: 760px) { .nav { display: none; } .top .btn { margin-left: auto; } }
@media (pointer: coarse) { .top .btn { min-height: 40px; } }
.eyebrow { font: 500 var(--step--1)/1.4 var(--sans); color: var(--ink-soft); }
.lede { font-size: var(--step-1); line-height: 1.5; color: var(--ink-soft); max-width: 34ch; }
/* footer */
.foot { border-top: 1px solid var(--line); font-size: var(--step--1); color: var(--ink-soft); }
.foot .wrap { padding-block: 32px 40px; display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: baseline; }
.foot nav { display: flex; flex-wrap: wrap; gap: 4px 8px; }
.foot nav a { padding: 10px 4px; }
.foot .legal { flex-basis: 100%; max-width: 80ch; }
/* reading pages: guide, privacy, legal */
.page .wrap { padding-block: 64px var(--section); display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; }
.page article { max-width: 70ch; display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; min-width: 0; }
.page h1 { font-size: var(--step-3); margin-bottom: 4px; }
.page h2 { margin-top: 26px; }
.page h3 { margin-top: 10px; }
.page p, .page li { color: var(--ink-soft); }
.page strong { color: var(--ink); font-weight: 650; }
.page ol, .page ul { margin: 0; padding-left: 1.3em; display: grid; gap: 10px; }
.page .lede { max-width: 54ch; }
.callout { border-radius: 14px; padding: 18px 20px; background: var(--paper-light); border: 1px solid var(--line); display: grid; gap: 6px; }
.callout.warn { border-color: var(--accent); }
.callout b { color: var(--ink); }
.ui { font: 600 .95em/1.2 var(--sans); padding: 1px 7px; border-radius: 6px; background: var(--paper-deep); color: var(--ink); white-space: normal; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.page .toc { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: var(--step--1); }
.figure img { border-radius: 12px; box-shadow: 0 0 0 1px rgba(21, 61, 60, .10); max-width: min(420px, 100%); }
.todo { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--ink); padding: 0 4px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) { .btn { transition: none; } }
/* hover only where a real pointer hovers; touch taps would leave it stuck */
@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: color-mix(in srgb, var(--button) 86%, var(--paper)); }
  .btn.quiet:hover { background: var(--paper-light); border-color: var(--ink-soft); }
  .nav a:hover { color: var(--ink); text-decoration: underline; }
}

/* the one authored entrance: copy settles in, then stays put */
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
@media (prefers-reduced-motion: reduce) { @keyframes rise { from { opacity: 0; } } }