/* Fumi site. Tokens copied from docs/DESIGN-LANGUAGE.md "Tokens" (light and dark), trimmed to what two pages need. */

@font-face { font-family: "Inter"; src: url("fonts/InterVariable.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/JetBrainsMono-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --h: 284; --nh: 245;
  --font-ui: "Inter", system-ui, "Segoe UI Variable Text", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --r-c: 6px; --r-i: 4px;
  --ease: cubic-bezier(.23, 1, .32, 1); --dur-base: 170ms;

  --bg: oklch(.975 .004 var(--nh)); --surface: oklch(.995 .002 var(--nh));
  --line: oklch(.915 .006 var(--nh)); --edge: oklch(.86 .008 var(--nh));
  --fg: oklch(.23 .012 var(--nh)); --muted: oklch(.42 .014 var(--nh)); --faint: oklch(.46 .012 var(--nh));
  --accent: oklch(.53 .2 var(--h)); --accent-soft: oklch(.53 .2 var(--h) / .11); --accent-on-soft: oklch(.45 .2 var(--h));
  --ring: var(--accent);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(.155 .006 var(--nh)); --surface: oklch(.195 .007 var(--nh));
    --line: oklch(.255 .008 var(--nh)); --edge: oklch(.32 .009 var(--nh));
    --fg: oklch(.93 .006 var(--nh)); --muted: oklch(.78 .01 var(--nh)); --faint: oklch(.68 .01 var(--nh));
    --accent: oklch(.75 .13 var(--h)); --accent-soft: oklch(.75 .13 var(--h) / .16); --accent-on-soft: oklch(.84 .1 var(--h));
    --ring: oklch(.75 .13 var(--h));
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 400 1rem/1.65 var(--font-ui); font-feature-settings: "case", "tnum";
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-on-soft); text-decoration-thickness: 1px; text-underline-offset: .2em; text-decoration-color: color-mix(in oklab, currentColor 40%, transparent); transition: text-decoration-color var(--dur-base) var(--ease); }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--ring); outline-offset: 3px; border-radius: var(--r-i); }

/* Page: a narrow margin column for labels, a reading column for text */
.page { max-width: 62rem; margin: 0 auto; padding: 0 16px 4rem; }
.row { display: grid; gap: .25rem 3rem; }
@media (min-width: 52rem) {
  .page { padding: 0 2.5rem 6rem; }
  .row { grid-template-columns: 10rem minmax(0, 38rem); }
}

/* Masthead: the name and the two links */
.masthead { display: flex; align-items: center; justify-content: space-between; padding: 1.75rem 0; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; min-height: 2rem; color: var(--fg); text-decoration: none; font-weight: 600; letter-spacing: -.01em; font-size: 1.05rem; }
.masthead nav { display: flex; gap: .25rem; }
.masthead nav a {
  display: inline-flex; align-items: center; min-height: 2rem; padding: 0 .75rem; border-radius: var(--r-c);
  color: var(--muted); text-decoration: none; font-size: .9rem; font-weight: 500;
}
.masthead nav a:hover { color: var(--fg); background: color-mix(in oklab, var(--fg) 6%, transparent); }
.masthead nav a[aria-current="page"] { color: var(--accent-on-soft); background: var(--accent-soft); }

/* The envelope: the page opens like a message header */
.envelope { margin: 4rem 0 0; padding: 0 0 1.5rem; border-bottom: 1px solid var(--line); }
.envelope div { padding: .3rem 0; }
.envelope dt, .label {
  font: 400 .78rem/1.9 var(--font-mono); color: var(--faint); letter-spacing: .02em;
}
.envelope dd { margin: 0; color: var(--muted); font-size: .95rem; }
.envelope dd.subject { color: var(--fg); font-weight: 500; }

/* Body of the letter */
.letter { padding: 3rem 0 1rem; }
h1 {
  margin: 0 0 1.5rem; font-weight: 600; letter-spacing: -.025em; line-height: 1.12;
  font-size: clamp(2rem, 1.2rem + 3.2vw, 3.1rem); text-wrap: balance;
}
.lead { margin: 0; font-size: 1.15rem; line-height: 1.6; color: var(--muted); text-wrap: pretty; }
.lead em { font-style: normal; color: var(--fg); }

/* Hairline rows, not cards */
.rows { margin: 3.5rem 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.rows > li, .rows > section { padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.rows h2 { margin: 0; font-size: 1rem; font-weight: 600; line-height: 1.65; }
.rows p, .rows ul { margin: 0; color: var(--muted); }
.rows p + p, .rows p + ul, .rows ul + p { margin-top: .75rem; }
.rows ul { padding-left: 1.1rem; }
.rows li li { padding: .15rem 0; }
.rows strong { color: var(--fg); font-weight: 500; }

.section-label { margin: 4.5rem 0 0; }

footer { margin-top: 4rem; color: var(--faint); font-size: .84rem; }
footer p { margin: 0; }