/* Marker project site — shared tokens and base.
   Layout concept: a survey sheet. Hairline rules, a left-aligned measure,
   mono figures in labelled fields, screenshots set as numbered plates.
   Palette is taken from the app's own store screenshots (paper ground,
   near-black ink, the brass rule under each caption) rather than invented. */

:root {
  /* colour — light (paper) */
  --bg: #f4f3f0;
  --surface: #fbfaf8;
  --ink: #191c1a;
  --muted: #5f6562;
  --line: #d8d5cd;
  --line-strong: #bdb9ae;
  /* demo map: land, state lines and coastline. Separate from the UI line
     tokens because the map needs more separation from its background than a
     table rule does — at hairline weights on a dense scatter, the UI values
     disappear under the dots. */
  --map-land: #e6e2d7;
  --map-line: #c7c1b2;
  --map-coast: #a39b89;
  /* Course dots sit back so the brass highlight carries the eye, the way the
     app's share card plays played courses against everything else. */
  --map-dot: #6c7168;
  --map-panel: #fbfaf8;
  --accent: #8a6a1f;        /* brass, as on the screenshot captions */
  --accent-bright: #a98127;
  --green: #2f5d3f;         /* fairway, for secondary data marks */
  --ghost: rgba(25, 28, 26, 0.13);

  /* type */
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* measure */
  --measure: 70rem;
  --prose: 38rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111312;
    --surface: #181b19;
    --ink: #e7e9e5;
    --muted: #9ba29d;
    --line: #272b28;
    --line-strong: #3a403c;
    --map-land: #232724;
    --map-line: #3b423c;
    --map-coast: #596158;
    --map-dot: #868d88;
    --map-panel: #0e100f;
    --accent: #d8b05c;
    --accent-bright: #e8c577;
    --green: #7fb08c;
    --ghost: rgba(231, 233, 229, 0.12);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111312;
  --surface: #181b19;
  --ink: #e7e9e5;
  --muted: #9ba29d;
  --line: #272b28;
  --line-strong: #3a403c;
  --map-land: #232724;
  --map-line: #3b423c;
  --map-coast: #596158;
  --map-dot: #868d88;
  --map-panel: #0e100f;
  --accent: #d8b05c;
  --accent-bright: #e8c577;
  --green: #7fb08c;
  --ghost: rgba(231, 233, 229, 0.12);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--measure);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }
a { color: inherit; }

/* a labelled field, as on a survey form */
.label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- masthead ---------- */

.masthead {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  background: var(--bg);
  z-index: 21;
}
.masthead .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
}
.wordmark span {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.masthead nav {
  display: flex;
  gap: 1.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
}
.masthead nav a { color: var(--muted); text-decoration: none; }
.masthead nav a:hover,
.masthead nav a[aria-current="page"] { color: var(--ink); }

/* ---------- sections ---------- */

section { border-top: 1px solid var(--line); }
section:first-of-type { border-top: 0; }
.sec { padding-block: clamp(2.75rem, 6vw, 4.5rem); }

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}
.sec-head h2 { font-size: clamp(1.35rem, 2.6vw, 1.75rem); }
.sec-head .label { margin-left: auto; white-space: nowrap; }

/* Below this the heading wraps to three lines with the label jammed beside it,
   so the label drops under instead. */
@media (max-width: 640px) {
  .sec-head { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .sec-head .label { margin-left: 0; white-space: normal; }
}

.prose { max-width: var(--prose); }
.prose p + p { margin-top: 1rem; }
.prose strong { font-weight: 600; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.6rem 1.05rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  transition: opacity 0.15s ease;
}
.btn:hover { opacity: 0.82; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn.ghost:hover { border-color: var(--ink); opacity: 1; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}
footer .wrap { padding-block: 2.5rem; display: grid; gap: 1.25rem; }
footer a { color: var(--muted); }
footer .attrib { max-width: var(--prose); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}