/*
 * Myrmo design system
 * Layout concept: a colony cross-section. Dark loam ground, content dug out as tunnels,
 * and a single glowing pheromone colour that marks whatever leads somewhere.
 */
:root {
  /* Colour: dark-first ("underground"). Light theme ("limestone") below. */
  --soil: #13100c;        /* page ground: deep loam */
  --tunnel: #1c1813;      /* raised surfaces */
  --wall: #2d261d;        /* borders, hairlines */
  --chalk: #ede4d3;       /* primary text */
  --dust: #9d9282;        /* secondary text */
  --amber: #ffb23e;       /* pheromone: the one accent */
  --amber-ink: #ffb23e;   /* accent used as text */
  --amber-glow: 255, 178, 62;  /* rgb triplet for canvas glow */
  --moss: #93d17f;        /* semantic: worked */
  --ember: #ef7a62;       /* semantic: failed / high risk */
  --ochre: #e0c35a;       /* semantic: medium risk */
  --code-bg: #0e0c09;

  /* Type */
  --f-display: "Martian Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --f-body: "Geologica", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-code: "Fragment Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  /* Scale (1.25) */
  --t-xs: 0.75rem;
  --t-sm: 0.875rem;
  --t-md: 1rem;
  --t-lg: 1.25rem;
  --t-xl: 1.5625rem;
  --t-2xl: 1.953rem;
  --t-3xl: clamp(2rem, 4.4vw, 3.6rem);

  --gutter: clamp(16px, 4vw, 48px);
  --radius: 6px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --soil: #ebe8e1;
    --tunnel: #f7f5f0;
    --wall: #d6d0c4;
    --chalk: #1c1813;
    --dust: #645c50;
    --amber: #e8901c;
    --amber-ink: #a35a00;
    --amber-glow: 214, 120, 10;
    --moss: #2f7d32;
    --ember: #b8402a;
    --ochre: #8a6d00;
    --code-bg: #1c1813;
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --soil: #ebe8e1;
  --tunnel: #f7f5f0;
  --wall: #d6d0c4;
  --chalk: #1c1813;
  --dust: #645c50;
  --amber: #e8901c;
  --amber-ink: #a35a00;
  --amber-glow: 214, 120, 10;
  --moss: #2f7d32;
  --ember: #b8402a;
  --ochre: #8a6d00;
  --code-bg: #1c1813;
  color-scheme: light;
}

*, *::before, *::after { 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;
  background: var(--soil);
  color: var(--chalk);
  font-family: var(--f-body);
  font-size: var(--t-md);
  line-height: 1.6;
  font-weight: 350;
}

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }
a { color: inherit; }
img, svg, canvas { max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

.eyebrow {
  font-family: var(--f-display);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dust);
}

code, pre, kbd { font-family: var(--f-code); }
:not(pre) > code {
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: color-mix(in srgb, var(--wall) 55%, transparent);
}

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px var(--gutter);
  background: color-mix(in srgb, var(--soil) 82%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--wall) 60%, transparent);
}
.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
  font-size: var(--t-sm);
}
.nav-links a {
  text-decoration: none;
  color: var(--dust);
  transition: color 0.15s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--chalk); }
@media (max-width: 720px) { .nav-links .optional { display: none; } .nav { gap: 16px; } .nav-links { gap: 16px; } }

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-family: var(--f-display);
  font-weight: 800;
  font-stretch: 112.5%;
  font-size: 1.15rem;
  letter-spacing: -0.04em;
  color: var(--chalk);
}
.wordmark svg { width: 26px; height: 12px; flex: none; }
.wordmark svg circle { fill: var(--amber); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 18px;
  border-radius: var(--radius);
  font-family: var(--f-display);
  font-size: var(--t-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--wall);
  color: var(--chalk);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--dust); }
.btn-amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #1a1206;
}
.btn-amber:hover { background: color-mix(in srgb, var(--amber) 85%, white); }

/* ---------- Code blocks ---------- */
.code {
  position: relative;
  min-width: 0;
  max-width: 100%;
  background: var(--code-bg);
  color: #e9e0cf;
  border: 1px solid var(--wall);
  border-radius: var(--radius);
  font-size: 0.82rem;
  line-height: 1.65;
}
.code pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
}
.code .copy {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 9px;
  font-family: var(--f-display);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #b9ad99;
  background: #241e17;
  border: 1px solid #3a3226;
  border-radius: 4px;
  cursor: pointer;
}
.code .copy:hover { color: #fff3dc; }
/* syntax tokens, always on the dark code ground */
.tk-k { color: #ffb23e; }   /* keys / keywords */
.tk-s { color: #b5d98f; }   /* strings */
.tk-n { color: #f3a27c; }   /* numbers */
.tk-c { color: #7d7262; }   /* comments */
.tk-p { color: #c6b9a3; }   /* prompt */

/* ---------- Pills ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 9px;
  border-radius: 999px;
  font-family: var(--f-display);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  border: 1px solid var(--wall);
  color: var(--dust);
  white-space: nowrap;
}
.pill.ok { color: var(--moss); border-color: color-mix(in srgb, var(--moss) 40%, transparent); }
.pill.warn { color: var(--ochre); border-color: color-mix(in srgb, var(--ochre) 40%, transparent); }
.pill.bad { color: var(--ember); border-color: color-mix(in srgb, var(--ember) 45%, transparent); }
.pill.amber { color: var(--amber-ink); border-color: color-mix(in srgb, var(--amber) 45%, transparent); }

/* ---------- Footer ---------- */
.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  align-items: baseline;
  padding: 40px var(--gutter) 56px;
  border-top: 1px solid var(--wall);
  font-size: var(--t-sm);
  color: var(--dust);
}
.footer a { color: var(--dust); }
.footer a:hover { color: var(--chalk); }
.footer .spacer { flex: 1; }