/* Noterat — shared site styles.
   Palette from the app icon: navy ground, cream pencil, coral eraser, wood tip.
   The page itself is a sheet of engineering paper. */

@font-face { font-family: "Fraunces"; src: url(/assets/fonts/fraunces.woff2) format("woff2"); font-weight: 300 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Fraunces"; src: url(/assets/fonts/fraunces-italic.woff2) format("woff2"); font-weight: 300 700; font-style: italic; font-display: swap; }
@font-face { font-family: "Caveat"; src: url(/assets/fonts/caveat.woff2) format("woff2"); font-weight: 500 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url(/assets/fonts/jetbrains-mono.woff2) format("woff2"); font-weight: 400 600; font-display: swap; }

:root {
  --navy: #184482;
  --navy-deep: #0e2a57;
  --cream: #faf4ea;
  --coral: #f7957a;
  --wood: #f6dcbc;

  --paper: #fbf6ec;
  --panel: #fffdf8;
  --grid: rgba(24, 68, 130, 0.065);
  --grid-major: rgba(24, 68, 130, 0.11);
  --ink: #10284f;
  --ink-soft: #4d5a72;
  --rule: #e5dccb;
  --accent: #184482;
  --pencil: #c4553a;          /* coral dark enough to read on paper */
  --accent-bg: #f3ecdf;
  --ok-bg: #fdf1e7;
  --ok-rule: #f0d2bf;
  --shadow: 0 1px 1px rgba(16,40,79,.06), 0 12px 32px -12px rgba(16,40,79,.28);

  --measure: 38rem;
  --wide: 76rem;
  --radius: 6px;
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --hand: "Caveat", "Bradley Hand", cursive;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d1c38;
    --panel: #12254a;
    --grid: rgba(250, 244, 234, 0.04);
    --grid-major: rgba(250, 244, 234, 0.075);
    --ink: #f4ede1;
    --ink-soft: #aeb8cb;
    --rule: #243a63;
    --accent: #f7957a;
    --pencil: #f7957a;
    --accent-bg: #15294f;
    --ok-bg: #172b52;
    --ok-rule: #2c4577;
    --shadow: 0 1px 1px rgba(0,0,0,.3), 0 16px 40px -14px rgba(0,0,0,.6);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  background-position: -1px -1px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
strong { font-weight: 600; }
::selection { background: var(--coral); color: #10284f; }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }
.wide { max-width: var(--wide); margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }

.mono { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.02em; }
.hand { font-family: var(--hand); }

/* ---------- Site header ---------- */
.site-head { border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 20; }
.site-head .bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.75rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--ink); text-decoration: none; font: 600 1.3rem/1 var(--serif); letter-spacing: -0.01em; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.site-nav { display: flex; gap: 1.5rem; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; position: relative; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"]::after { content: ""; position: absolute; left: -2px; right: -2px; bottom: -3px; height: 6px; background: var(--coral); opacity: .55; border-radius: 3px; z-index: -1; }
@media (max-width: 480px) { .site-nav { gap: 1rem; } .site-nav a { font-size: 0.9rem; } }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 0.65rem; padding: 0.85rem 1.35rem 0.85rem 1.1rem; border-radius: 12px; font-weight: 600; font-size: 1rem; text-decoration: none; line-height: 1.15; transition: transform .15s ease, box-shadow .15s ease; }
.btn svg { width: 1.35em; height: 1.35em; flex: none; }
.btn .two { display: flex; flex-direction: column; }
.btn .two small { font-weight: 500; font-size: 0.7rem; opacity: .75; letter-spacing: .01em; }
.btn-ink { background: var(--ink); color: var(--paper); box-shadow: 0 2px 0 rgba(0,0,0,.18); }
.btn-ink:hover { transform: translateY(-2px); box-shadow: 0 6px 0 rgba(0,0,0,.14); text-decoration: none; }
.btn-coral { background: var(--coral); color: #10284f; box-shadow: 0 2px 0 rgba(0,0,0,.2); }
.btn-coral:hover { transform: translateY(-2px); box-shadow: 0 6px 0 rgba(0,0,0,.18); }

/* ---------- Page header (inner pages) ---------- */
.page-head { padding: 3.5rem 0 2.5rem; margin-bottom: 2.5rem; border-bottom: 1px solid var(--rule); }
.page-head .eyebrow { font-family: var(--mono); font-size: 0.78rem; color: var(--pencil); margin: 0 0 0.9rem; }
h1 { font: 500 clamp(2.2rem, 5vw, 3.1rem)/1.05 var(--serif); letter-spacing: -0.025em; margin: 0 0 0.75rem; font-variation-settings: "opsz" 144; }
.page-head h1 .slash { color: var(--ink-soft); font-weight: 300; font-style: italic; }
.updated { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-soft); margin: 0; }

/* ---------- Footer ---------- */
.site-foot { margin-top: 6rem; background: var(--navy-deep); color: rgba(250,244,234,.72); font-size: 0.92rem; padding: 3rem 0; }
.site-foot .cols { display: flex; flex-wrap: wrap; gap: 1.75rem 3rem; justify-content: space-between; align-items: flex-start; }
.site-foot a { color: var(--cream); text-decoration: none; }
.site-foot a:hover { text-decoration: underline; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.site-foot p { margin: 0 0 0.35rem; }
.site-foot .brand { color: var(--cream); margin-bottom: 0.9rem; }
.site-foot .sig { font-family: var(--hand); font-size: 1.35rem; color: var(--coral); margin-top: .5rem; }