/* =============================================================
   Mycelium — a landing page that deliberately isn't a dev tool page
   ============================================================= */

:root {
  /* Loam — warm-black soil, not cool-black slate */
  --bg: #0a0906;
  --bg-soft: #110e09;
  --bg-card: #171310;
  --border: #2a2219;
  --border-soft: #1e1813;

  /* Spore */
  --text: #f5f1e8;            /* warm off-white, not cold white */
  --text-soft: #a8a096;       /* mushroom tan */
  --text-dim: #6b635a;        /* dim loam */

  /* Bioluminescence */
  --accent: #a3e635;          /* phosphorescent lime */
  --accent-soft: #84cc16;
  --accent-glow: rgba(163, 230, 53, 0.22);
  --accent-glow-soft: rgba(163, 230, 53, 0.08);

  /* Fungal ochres */
  --amber: #d97706;
  --ochre: #a16207;
  --rust: #9a3412;

  /* Fonts */
  --serif: 'Fraunces', ui-serif, Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
}

/* -------------------------------------------------------------
   Reset & baseline
   ------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* Subtle living-organism grain on the background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(163, 230, 53, 0.04), transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(217, 119, 6, 0.03), transparent 50%);
}

#myc-net {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.75;
}

main, header, footer { position: relative; z-index: 2; }

a {
  color: var(--text);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease;
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
  color: var(--accent);
  background: var(--accent-glow-soft);
  padding: 0.08em 0.35em;
  border-radius: 3px;
}

pre {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-left: 2px solid var(--accent);
  padding: 14px 16px;
  border-radius: 4px;
  overflow-x: auto;
  color: var(--text);
  margin: 0;
}

em { font-style: italic; color: var(--text-soft); }

/* -------------------------------------------------------------
   Nav
   ------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 9, 6, 0.78);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid var(--border-soft);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 640px) { .nav-inner { padding: 16px 32px; } }
@media (max-width: 520px) { .nav nav { gap: 16px; font-size: 12px; } }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.logo svg { color: var(--accent); }

.nav nav {
  display: flex;
  gap: 28px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-soft);
}

.nav nav a:hover { color: var(--accent); }

/* -------------------------------------------------------------
   Hero
   ------------------------------------------------------------- */

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 72px 22px 100px;
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

@media (min-width: 640px) { .hero { padding: 88px 32px 110px; } }
@media (min-width: 900px) {
  .hero {
    padding: 96px 32px 120px;
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 80px;
  }
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: lowercase;
  letter-spacing: 0.05em;
  margin: 0 0 20px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(44px, 6.8vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  font-weight: 400;
  margin: 0 0 32px;
  color: var(--text);
  /* Fraunces variable axes: optical size + SOFT for mushroom-cap curves */
  font-variation-settings: 'opsz' 144, 'SOFT' 60;
}

.h1-serif { display: block; }
.h1-serif.italic {
  font-style: italic;
  color: var(--accent);
  font-variation-settings: 'opsz' 144, 'SOFT' 80;
}

.lede {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.6;
  color: var(--text-soft);
  max-width: 56ch;
  margin: 0 0 18px;
  font-weight: 300;
  font-variation-settings: 'opsz' 24, 'SOFT' 30;
}

.lede:last-of-type { margin-bottom: 40px; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 12px;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--bg);
  background: var(--accent);
  padding: 13px 20px 13px 22px;
  border-radius: 3px;
  transition: all 180ms ease;
  box-shadow: 0 0 0 1px var(--accent), 0 8px 24px -8px var(--accent-glow);
}

.cta:hover {
  background: #b4ef55;
  box-shadow: 0 0 0 1px #b4ef55, 0 10px 30px -8px var(--accent-glow);
  transform: translateY(-1px);
}

.inline-cmd {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-soft);
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  padding: 12px 18px;
  border-radius: 3px;
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .inline-cmd { font-size: 11.5px; padding: 10px 14px; }
}

.inline-cmd .prompt { color: var(--accent); margin-right: 10px; opacity: 0.7; }

/* Hero marginalia — a scholarly footnote in the margin */
.hero-marginalia {
  font-family: var(--serif);
  font-style: italic;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
  padding-left: 20px;
  border-left: 1px solid var(--border-soft);
  align-self: end;
  max-width: 28ch;
  position: relative;
}

.hero-marginalia em { color: var(--text-soft); }

.margin-label {
  position: absolute;
  top: -2px;
  left: -22px;
  font-family: var(--mono);
  font-style: normal;
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 0.1em;
  background: var(--bg);
  padding: 0 6px;
}

/* -------------------------------------------------------------
   Chapters (prose-heavy sections)
   ------------------------------------------------------------- */

.chapter {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 640px) { .chapter { padding: 80px 32px; } }
@media (min-width: 900px) {
  .chapter { grid-template-columns: 120px 1fr; gap: 64px; }
}

.chapter-num {
  font-family: var(--serif);
  font-size: 48px;
  font-weight: 300;
  color: var(--accent);
  font-style: italic;
  letter-spacing: -0.02em;
  line-height: 1;
  font-variation-settings: 'opsz' 144, 'SOFT' 100;
  opacity: 0.85;
}

.chapter-body { max-width: 62ch; }

.chapter h2, .anatomy-header h2, .install h2, .why h2, .how h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 4.2vw, 48px);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 32px;
  font-variation-settings: 'opsz' 96, 'SOFT' 50;
}

.chapter-body p {
  margin: 0 0 20px;
  color: var(--text-soft);
}

.pullquote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  line-height: 1.4;
  color: var(--text);
  padding: 20px 0 20px 28px;
  border-left: 2px solid var(--accent);
  margin: 36px 0 !important;
  max-width: 58ch;
  font-variation-settings: 'opsz' 48, 'SOFT' 70;
}

.pullquote.small { font-size: 18px; }

/* -------------------------------------------------------------
   Anatomy — specimen cards
   ------------------------------------------------------------- */

.anatomy {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 22px;
}
@media (min-width: 640px) { .anatomy { padding: 80px 32px; } }

.anatomy-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 62ch;
  margin-bottom: 56px;
}

@media (min-width: 900px) {
  .anatomy-header {
    grid-template-columns: 120px 1fr;
    gap: 64px;
    max-width: none;
  }
  .anatomy-header h2 { margin-bottom: 20px; }
}

.anatomy-sub {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--text-soft);
  margin: 0;
  max-width: 56ch;
  font-weight: 300;
  font-variation-settings: 'opsz' 24, 'SOFT' 30;
}

@media (min-width: 900px) {
  .anatomy-sub { grid-column: 2; }
  .anatomy-header h2 { grid-column: 2; }
  .anatomy-header .chapter-num { grid-column: 1; grid-row: 1 / span 2; }
}

.specimens {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: 3px;
  overflow: hidden;
}

@media (min-width: 700px) { .specimens { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1040px) { .specimens { grid-template-columns: 1fr 1fr 1fr; } }

.specimen {
  background: var(--bg-card);
  padding: 28px 28px 32px;
  position: relative;
  transition: background 250ms ease;
  overflow: hidden;
}

.specimen:hover { background: #1b1612; }

.specimen-glyph {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 72px;
  height: 72px;
  opacity: 0.92;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.4));
  transition: transform 400ms cubic-bezier(.2,.8,.2,1), opacity 250ms ease;
}

.specimen:hover .specimen-glyph {
  transform: translateY(-2px) rotate(-2deg);
  opacity: 1;
}

.specimen-taxon { padding-right: 80px; }

.specimen-taxon {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
}

.specimen-name {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.specimen-name::before {
  content: "myc ";
  color: var(--text-dim);
  font-weight: 400;
}

.specimen-role {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--text-dim);
  font-variation-settings: 'opsz' 24, 'SOFT' 50;
}

.specimen-def {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--text-soft);
  line-height: 1.55;
  margin: 14px 0 18px;
  font-weight: 300;
  font-variation-settings: 'opsz' 24, 'SOFT' 40;
}

.specimen-code {
  font-size: 12.5px;
  background: var(--bg);
  border-left-width: 2px;
  padding: 12px 14px;
  line-height: 1.55;
}

.c-prompt { color: var(--accent); opacity: 0.7; }
.c-arg { color: var(--amber); }
.c-str { color: var(--text); }

/* -------------------------------------------------------------
   How it grows — grid
   ------------------------------------------------------------- */

.how {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 640px) { .how { padding: 80px 32px; } }
@media (min-width: 900px) {
  .how { grid-template-columns: 120px 1fr; gap: 64px; }
}

.how-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 16px;
}

@media (min-width: 700px) { .how-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1040px) { .how-grid { grid-template-columns: 1fr 1fr 1fr; } }

.how-cell {
  background: var(--bg-card);
  padding: 28px;
  transition: background 250ms ease;
}

.how-cell:hover { background: #1b1612; }

.how-n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.how-cell h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  color: var(--text);
  margin: 0 0 12px;
  font-variation-settings: 'opsz' 48, 'SOFT' 60;
}

.how-cell p {
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.65;
  margin: 0;
}

/* -------------------------------------------------------------
   Install — numbered steps
   ------------------------------------------------------------- */

.install {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 640px) { .install { padding: 80px 32px; } }
@media (min-width: 900px) {
  .install { grid-template-columns: 120px 1fr; gap: 64px; }
}

.install-note {
  font-family: var(--serif);
  font-style: italic;
  color: var(--text-dim);
  font-size: 15px;
  margin-bottom: 40px;
  max-width: 58ch;
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step;
  max-width: 68ch;
}

.steps li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--border-soft);
}

.steps li:first-child { border-top: none; padding-top: 0; }

.step-label {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--accent);
  padding-top: 2px;
  font-variation-settings: 'opsz' 24, 'SOFT' 80;
}

.step-body p {
  margin: 0 0 12px;
  color: var(--text-soft);
  font-size: 15.5px;
}

.step-body pre {
  font-size: 13.5px;
  width: 100%;
  max-width: 520px;
}

/* -------------------------------------------------------------
   Why
   ------------------------------------------------------------- */

.why {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 22px 110px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 640px) { .why { padding: 80px 32px 140px; } }
@media (min-width: 900px) {
  .why { grid-template-columns: 120px 1fr; gap: 64px; }
  .why .chapter-body { max-width: 62ch; }
}

.why p {
  margin: 0 0 20px;
  color: var(--text-soft);
  font-size: 16.5px;
}

/* -------------------------------------------------------------
   Footer
   ------------------------------------------------------------- */

footer {
  border-top: 1px solid var(--border-soft);
  padding: 56px 32px 80px;
  background: var(--bg-soft);
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 700px) { .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; } }

.footer-col { display: flex; flex-direction: column; gap: 8px; }

.footer-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.footer-col a {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-soft);
}

.footer-col a:hover { color: var(--accent); }

.footer-tag {
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--text-soft);
  line-height: 1.55;
  max-width: 34ch;
  margin: 0;
  font-variation-settings: 'opsz' 24, 'SOFT' 40;
}

.footer-license {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* -------------------------------------------------------------
   Accessibility — respect reduced motion
   ------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  #myc-net { display: none; }
  body::before { opacity: 0.6; }
}

/* Focus states */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--accent); color: var(--bg); }