@font-face { font-family: "Quattro"; src: url("fonts/iAWriterQuattroS-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Quattro"; src: url("fonts/iAWriterQuattroS-Bold.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Quattro"; src: url("fonts/iAWriterQuattroS-Italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Quattro"; src: url("fonts/iAWriterQuattroS-BoldItalic.woff2") format("woff2"); font-weight: 700; font-style: italic; font-display: swap; }

:root {
  --bg: #1a1b26;
  --surface: #1f2130;
  --raised: #262a3d;
  --text: #c0caf5;
  --body: #a9b1d6;
  --dim: #787fa6;
  --faint: #565f89;
  --hair: rgba(169, 177, 214, 0.14);
  --accent: #7aa2f7;
  --accent-ink: #1a1b26;
  --green: #9ece6a;
  --red: #f7768e;
  --radius: 10px;
  --measure: 64ch;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #eff1f5;
    --surface: #e6e9ef;
    --raised: #dce0e8;
    --text: #4c4f69;
    --body: #5c5f77;
    --dim: #7c7f93;
    --faint: #9ca0b0;
    --hair: rgba(76, 79, 105, 0.14);
    --accent: #1e66f5;
    --accent-ink: #eff1f5;
    --green: #40a02b;
    --red: #d20f39;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: "Quattro", "iA Writer Quattro S", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 17px;
  line-height: 1.65;
  font-feature-settings: "kern", "liga";
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3 { color: var(--text); font-weight: 700; letter-spacing: -0.01em; line-height: 1.15; margin: 0; }
h1 { font-size: clamp(34px, 5.2vw, 58px); }
h2 { font-size: clamp(26px, 3.4vw, 36px); }
h3 { font-size: 20px; margin-top: 2.2em; }
p { margin: 0 0 1.1em; max-width: var(--measure); }
strong { color: var(--text); font-weight: 700; }
code, pre { font-family: "Quattro", ui-monospace, "SF Mono", Menlo, monospace; }
code { background: var(--surface); border-radius: 5px; padding: 0.08em 0.4em; color: var(--text); font-size: 0.94em; }
pre {
  background: var(--surface);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 0 0 1.4em;
  color: var(--text);
  line-height: 1.55;
  max-width: 100%;
}
pre code { background: none; padding: 0; font-size: 15px; }
kbd {
  font-family: inherit;
  font-size: 0.85em;
  color: var(--text);
  background: var(--raised);
  border: 1px solid var(--hair);
  border-radius: 5px;
  padding: 0.1em 0.5em;
  white-space: nowrap;
}

.wrap { width: min(1160px, 100% - 32px); margin: 0 auto; }

/* ---- nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hair);
}
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 58px; }
.brand { color: var(--text); font-weight: 700; font-size: 18px; letter-spacing: -0.01em; display: flex; align-items: center; gap: 10px; }
.brand:hover { text-decoration: none; }
.brand svg { width: 22px; height: 22px; }
.nav nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.nav nav a { color: var(--dim); }
.nav nav a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 640px) { .nav nav a.hide-sm { display: none; } }

/* ---- hero */
.hero { padding: 72px 0 32px; }
.hero h1 { max-width: 20ch; }
.hero .lede { font-size: clamp(18px, 2vw, 21px); color: var(--body); max-width: 56ch; margin: 22px 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button {
  display: inline-block; padding: 10px 18px; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 15px;
}
.button:hover { text-decoration: none; filter: brightness(1.08); }
.button.quiet { background: var(--surface); color: var(--text); border: 1px solid var(--hair); }
.hero .apps { display: flex; gap: 28px; margin-top: 34px; color: var(--dim); font-size: 15px; flex-wrap: wrap; }
.hero .apps span { display: inline-flex; align-items: center; gap: 8px; }
.hero .apps svg { width: 18px; height: 18px; }

figure { margin: 36px 0 12px; }
figure img { width: 100%; height: auto; display: block; border-radius: 14px; }
figcaption { color: var(--faint); font-size: 14px; margin-top: 10px; }
figure.tight { margin-top: 20px; }

/* ---- sections */
section { padding: 64px 0 24px; }
section + section { border-top: 1px solid var(--hair); }
h2 img { width: 0.8em; height: 0.8em; vertical-align: -0.06em; margin-right: 0.4em; }
section > .wrap > h2 { margin-bottom: 18px; }
.lead { font-size: 18px; color: var(--body); }

.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px 40px; margin-top: 34px; }
.principles p { margin: 0; max-width: none; }
.principles h3 { font-size: 17px; margin: 0 0 6px; }
@media (max-width: 900px) { .principles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .principles { grid-template-columns: 1fr; } }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; margin-top: 28px; }
@media (max-width: 820px) { .cols { grid-template-columns: 1fr; } }
.cols figure { margin: 0; }

.keys { border-collapse: collapse; width: 100%; max-width: 720px; margin: 10px 0 28px; font-size: 15px; }
.keys td { padding: 8px 12px 8px 0; border-bottom: 1px solid var(--hair); vertical-align: top; }
.keys td:first-child { white-space: nowrap; color: var(--text); width: 1%; padding-right: 22px; }

.how { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px 40px; margin-top: 28px; }
.how p { margin: 0; max-width: none; }
.how h3 { font-size: 17px; margin: 0 0 6px; }
@media (max-width: 700px) { .how { grid-template-columns: 1fr; } }

.install pre { max-width: 720px; }
.note { color: var(--dim); font-size: 15px; }

footer { border-top: 1px solid var(--hair); padding: 36px 0 60px; color: var(--faint); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 28px; align-items: center; }
footer a { color: var(--dim); }