/* Limestone marketing site — styles
   Brand tokens mirror lim-brand-skills (tokens.css). Green #2FBF39 and paper
   #FBFFF6 are shared anchors with American Wetware. Three colors; paper/ink
   swap roles between light and dark; green is constant.
   Fonts: Space Mono (display/wordmark), Inter (body), IBM Plex Mono (code/data). */

:root {
  --ls-paper: #FBFFF6;
  --ls-ink:   #16191A;
  --ls-green: #2FBF39;
  --ls-ink-aww: #1C1E35;

  --ls-bg:          var(--ls-paper);
  --ls-fg:          var(--ls-ink);
  --ls-accent:      var(--ls-green);
  --ls-accent-text: #1E8A28;
  --ls-muted:       #5C6560;
  --ls-line:        #DCE3DA;
  --ls-surface:     #F3F7EF;   /* faint paper panel */

  --ls-link:        #8BA0D6;
  --ls-link-strong: #5B6FA8;
  --ls-warning:     #CA1E08;
  --ls-periwinkle:  #D1DCFF;
  --ls-mint-wash:   #E3F7E3;
  --ls-yellow:      #FFFF77;

  --ls-font-display: "Space Mono", ui-monospace, monospace;
  --ls-font-sans:    "Inter", system-ui, sans-serif;
  --ls-font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --ls-maxw: 1080px;
}

[data-theme="dark"] {
  --ls-bg:          var(--ls-ink);
  --ls-fg:          var(--ls-paper);
  --ls-accent-text: var(--ls-green);
  --ls-muted:       #8B9088;
  --ls-line:        #2A2E2C;
  --ls-surface:     #1C201D;
}

/* self-hosted fonts (shared assets/) */
@font-face { font-family:'Space Mono'; font-weight:400; font-display:swap;
  src:url('assets/fonts/space-mono/space-mono-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family:'Space Mono'; font-weight:700; font-display:swap;
  src:url('assets/fonts/space-mono/space-mono-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:400; font-display:swap;
  src:url('assets/fonts/inter/inter-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:500; font-display:swap;
  src:url('assets/fonts/inter/inter-latin-500-normal.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:700; font-display:swap;
  src:url('assets/fonts/inter/inter-latin-700-normal.woff2') format('woff2'); }
@font-face { font-family:'IBM Plex Mono'; font-weight:400; font-display:swap;
  src:url('assets/fonts/ibm-plex-mono/ibm-plex-mono-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family:'IBM Plex Mono'; font-weight:500; font-display:swap;
  src:url('assets/fonts/ibm-plex-mono/ibm-plex-mono-latin-500-normal.woff2') format('woff2'); }
@font-face { font-family:'IBM Plex Mono'; font-weight:700; font-display:swap;
  src:url('assets/fonts/ibm-plex-mono/ibm-plex-mono-latin-700-normal.woff2') format('woff2'); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--ls-font-sans);
  background: var(--ls-bg);
  color: var(--ls-fg);
  line-height: 1.6;
  transition: background .25s, color .25s;
  -webkit-font-smoothing: antialiased;
}

/* ---- header / nav ---- */
header.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px;
  padding: 14px 28px;
  background: color-mix(in srgb, var(--ls-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ls-line);
}
header.top .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
header.top .brand img { height: 28px; }
header.top .wm { font-family: var(--ls-font-display); font-weight: 700; font-size: 20px; letter-spacing: -.04em; }
header.top nav { margin-left: auto; display: flex; gap: 22px; align-items: center; }
header.top nav a { color: var(--ls-muted); text-decoration: none; font-size: 14px; font-weight: 500; }
header.top nav a:hover { color: var(--ls-fg); }
header.top nav a.active { color: var(--ls-fg); }
.theme-toggle {
  border: 1px solid var(--ls-line); background: transparent; color: var(--ls-fg);
  border-radius: 8px; padding: 6px 12px; cursor: pointer; font-size: 13px;
  font-family: var(--ls-font-mono);
}

/* ---- layout primitives ---- */
.wrap { max-width: var(--ls-maxw); margin: 0 auto; padding: 0 28px; }
.section { padding: 72px 0; }
.section.tight { padding: 48px 0; }
.eyebrow { font-family: var(--ls-font-mono); font-size: 13px; color: var(--ls-accent-text);
  text-transform: uppercase; letter-spacing: .12em; margin-bottom: 12px; }
h1 { font-family: var(--ls-font-display); font-weight: 700; font-size: clamp(34px,6vw,58px);
  letter-spacing: -.035em; line-height: 1.05; margin: 0 0 18px; }
h2 { font-family: var(--ls-font-display); font-weight: 700; font-size: clamp(24px,3.4vw,34px);
  letter-spacing: -.025em; line-height: 1.15; margin: 0 0 14px; }
h3 { font-size: 19px; font-weight: 700; margin: 0 0 8px; letter-spacing: -.01em; }
.lede { color: var(--ls-muted); font-size: clamp(17px,2.2vw,21px); max-width: 62ch; margin: 0 0 8px; }
.muted { color: var(--ls-muted); }
code, .mono { font-family: var(--ls-font-mono); font-size: .9em; }
.k { font-family: var(--ls-font-mono); color: var(--ls-accent-text); font-size: .92em; }
.center { text-align: center; }
.center .lede { margin-left: auto; margin-right: auto; }

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  font-family: var(--ls-font-sans); font-weight: 600; font-size: 15px;
  padding: 12px 22px; border-radius: 10px; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--ls-green); color: #0b0f0c; }
.btn-primary:hover { background: #29a832; }
.btn-ghost { background: transparent; color: var(--ls-fg); border-color: var(--ls-line); }
.btn-ghost:hover { border-color: var(--ls-fg); }
.btn[aria-disabled="true"], .btn.is-disabled {
  opacity: .55; cursor: not-allowed; pointer-events: none;
}
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }
.center .btn-row { justify-content: center; }

/* ---- hero ---- */
.hero { position: relative; padding: 84px 0 64px; }
.hero .wrap { text-align: center; }

/* [[limestone]] wordmark as the hero heading */
.hero .wordmark {
  font-family: var(--ls-font-display); font-weight: 700;
  font-size: clamp(44px, 9vw, 88px); letter-spacing: -.05em; line-height: 1;
  margin: 0 0 18px; color: var(--ls-fg);
  display: inline-flex; align-items: baseline; justify-content: center;
}
.hero .wordmark .brk { color: var(--ls-accent); }

/* blinking square cursor after the wordmark */
.hero .wordmark .cursor {
  display: inline-block; width: .52em; height: .92em;
  margin-left: .12em; background: var(--ls-accent);
  transform: translateY(.06em);
  animation: ls-blink 1.05s steps(1) infinite;
}
@keyframes ls-blink { 0%,50% { opacity: 1; } 50.01%,100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .hero .wordmark .cursor { animation: none; opacity: 1; }
}

.hero .tagline-sub {
  font-family: var(--ls-font-display); font-weight: 700;
  font-size: clamp(18px, 2.6vw, 26px); letter-spacing: -.02em;
  margin: 0 0 16px; color: var(--ls-fg);
}
.hero .values { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 26px; }
.chip { font-family: var(--ls-font-mono); font-size: 13px; padding: 6px 13px; border-radius: 999px;
  border: 1px solid var(--ls-accent); color: var(--ls-accent-text); }

/* ---- feature rows (home) ---- */
.features { display: flex; flex-direction: column; gap: 0; }
.feature {
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center;
  padding: 56px 0; border-top: 1px solid var(--ls-line);
}
.feature:nth-child(even) .feature-visual { order: -1; }
.feature-num { font-family: var(--ls-font-mono); font-size: 13px; color: var(--ls-accent-text);
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 10px; }
.feature p { color: var(--ls-muted); font-size: 16px; margin: 0; max-width: 52ch; }
.feature-visual {
  background: var(--ls-surface); border: 1px solid var(--ls-line); border-radius: 18px;
  min-height: 200px; display: flex; align-items: center; justify-content: center;
  padding: 28px; overflow: hidden;
}
/* small monospace "diagram" motifs inside visuals */
.motif { font-family: var(--ls-font-mono); font-size: 13px; color: var(--ls-muted);
  line-height: 1.9; white-space: pre; text-align: left; }
.motif .g { color: var(--ls-accent-text); }
.motif .b { color: var(--ls-link-strong); }
.motif-big { font-family: var(--ls-font-display); font-weight: 700; font-size: 46px;
  letter-spacing: -.04em; color: var(--ls-fg); }
.motif-big .brk { color: var(--ls-accent); }

/* ---- generic card grid (short feature summary, about, etc.) ---- */
.grid { display: grid; gap: 16px; }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card { border: 1px solid var(--ls-line); border-radius: 14px; padding: 22px; background: var(--ls-bg); }
.card h3 { font-size: 16px; }
.card p { margin: 0; color: var(--ls-muted); font-size: 14px; }
.card .ic { font-family: var(--ls-font-mono); color: var(--ls-accent-text); font-size: 13px;
  letter-spacing: .06em; margin-bottom: 10px; }

/* ---- pricing ---- */
.price-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 760px; margin: 0 auto; }
.price-card {
  border: 1px solid var(--ls-line); border-radius: 18px; padding: 30px; background: var(--ls-bg);
  display: flex; flex-direction: column;
}
.price-card.featured { border-color: var(--ls-accent); box-shadow: 0 0 0 1px var(--ls-accent) inset; }
.price-tag { font-family: var(--ls-font-mono); font-size: 12px; color: var(--ls-accent-text);
  text-transform: uppercase; letter-spacing: .1em; margin-bottom: 12px; }
.price-amt { font-family: var(--ls-font-display); font-weight: 700; font-size: 44px; letter-spacing: -.03em;
  line-height: 1; }
.price-amt .per { font-family: var(--ls-font-sans); font-size: 15px; font-weight: 500; color: var(--ls-muted);
  letter-spacing: 0; }
.price-desc { color: var(--ls-muted); margin: 12px 0 20px; font-size: 15px; }
.price-list { list-style: none; margin: 0 0 24px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.price-list li { position: relative; padding-left: 26px; font-size: 15px; }
.price-list li::before { content: "✓"; position: absolute; left: 0; color: var(--ls-accent);
  font-weight: 700; }
.price-card .btn { margin-top: auto; }

/* ---- download tiles ---- */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.dl-tile { border: 1px solid var(--ls-line); border-radius: 16px; padding: 26px; text-align: center;
  background: var(--ls-bg); display: flex; flex-direction: column; align-items: center; gap: 6px; }
.dl-tile .os { font-family: var(--ls-font-display); font-weight: 700; font-size: 20px; }
.dl-tile .meta { font-family: var(--ls-font-mono); font-size: 12px; color: var(--ls-muted); margin-bottom: 14px; }
.dl-tile .btn { width: 100%; }
.dl-glyph { font-size: 30px; line-height: 1; margin-bottom: 6px; }

/* ---- callout / notice ---- */
.notice {
  border: 1px solid var(--ls-accent); border-radius: 14px; padding: 18px 22px;
  background: color-mix(in srgb, var(--ls-accent) 8%, transparent);
  font-size: 15px; color: var(--ls-fg);
}
.notice strong { color: var(--ls-accent-text); }
.callout { border: 1px solid var(--ls-line); border-radius: 16px; padding: 26px; background: var(--ls-surface); }

/* ---- CTA band ---- */
.cta {
  border: 1px solid var(--ls-line); border-radius: 22px; padding: 48px; text-align: center;
  background: var(--ls-surface);
}
.cta h2 { margin-bottom: 10px; }

/* ---- prose (about, legal) ---- */
.prose { max-width: 68ch; }
.prose p { color: var(--ls-fg); }
.prose h2 { margin-top: 40px; }
.prose ul { padding-left: 20px; color: var(--ls-fg); }
.prose li { margin: 6px 0; }
.prose a { color: var(--ls-link-strong); }

/* ---- footer ---- */
footer.site {
  border-top: 1px solid var(--ls-line); margin-top: 40px; padding: 40px 28px;
}
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between; align-items: flex-start; }
footer.site .f-brand { display: flex; align-items: center; gap: 10px; }
footer.site .f-brand img { height: 24px; }
footer.site .f-brand .wm { font-family: var(--ls-font-display); font-weight: 700; letter-spacing: -.04em; }
footer.site nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer.site nav a { color: var(--ls-muted); text-decoration: none; font-size: 14px; }
footer.site nav a:hover { color: var(--ls-fg); }
footer.site .f-legal { width: 100%; color: var(--ls-muted); font-family: var(--ls-font-mono);
  font-size: 12px; border-top: 1px solid var(--ls-line); padding-top: 18px; margin-top: 6px; }

/* ---- responsive ---- */
@media (max-width: 860px) {
  .feature { grid-template-columns: 1fr; gap: 24px; padding: 44px 0; }
  .feature:nth-child(even) .feature-visual { order: 0; }
  .cols-3 { grid-template-columns: 1fr; }
  .cols-2 { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .dl-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  header.top { padding: 12px 18px; gap: 10px; }
  header.top nav { gap: 14px; }
  header.top nav a.hide-sm { display: none; }
  .wrap { padding: 0 18px; }
  .cta { padding: 32px 22px; }
}