/* ============================================================================
   Preston-Check landing — proprietary visual system

   Color tokens
     --ink         #0B1F3A   deep navy, primary text + brand
     --paper       #FFFFFF   surface
     --paper-2     #F8FAFC   raised surface
     --rule        #E2E8F0   hairline rules + dividers
     --mute        #475569   secondary text
     --mute-2      #94A3B8   tertiary text
     --accent      #10B981   emerald — Preston-Check brand accent (PASS, score)
     --accent-2    #2563EB   action blue (CTAs, links)
     --warn        #F59E0B   amber (WARN)
     --bad         #DC2626   red (FAIL, critical)

   Typography
     Headings — system serif (ui-serif / Georgia fallback). Editorial, calm.
     Body     — system sans (ui-sans-serif / Inter fallback). Honest, legible.
     Code     — system mono (ui-monospace / Menlo fallback). For terminal blocks.

   Grid: 1200px max content width, 24px gutter, 8px base spacing rhythm.
   Type scale: 1.250 modular (major third) anchored at 18px body.
============================================================================ */

:root {
  --ink: #0B1F3A;
  --paper: #FFFFFF;
  --paper-2: #F8FAFC;
  --rule: #E2E8F0;
  --mute: #475569;
  --mute-2: #94A3B8;
  --accent: #10B981;
  --accent-2: #2563EB;
  --warn: #F59E0B;
  --bad: #DC2626;

  --serif: ui-serif, Georgia, "Times New Roman", serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ----- Layout ----------------------------------------------------------- */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 96px 0; border-top: 1px solid var(--rule); }
section:first-of-type { border-top: 0; }

/* ----- Type ------------------------------------------------------------- */
h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 0.5em 0;
}
h1 { font-size: 56px; line-height: 1.05; letter-spacing: -0.02em; }
h2 { font-size: 36px; line-height: 1.15; }
h3 { font-size: 22px; line-height: 1.3; font-family: var(--sans); font-weight: 600; }
p  { margin: 0 0 1em 0; color: var(--mute); }
.lede { font-size: 22px; color: var(--mute); max-width: 60ch; }

.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px 0;
  font-weight: 600;
}

code, pre { font-family: var(--mono); font-size: 14px; }

/* ----- Header ----------------------------------------------------------- */
header.site {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  z-index: 50;
  border-bottom: 1px solid var(--rule);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}
header.site nav { display: flex; gap: 28px; align-items: center; }
header.site nav a { color: var(--ink); font-size: 15px; }
header.site nav a:hover { color: var(--accent-2); text-decoration: none; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 32px; width: auto; }

/* ----- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .08s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #14305A; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-ghost:hover { border-color: var(--ink); }
.btn .icon { width: 18px; height: 18px; }

/* ----- Hero ------------------------------------------------------------- */
.hero {
  padding: 96px 0 72px 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* faint diamond watermark in background */
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("assets/diamond-watermark.svg");
  background-repeat: no-repeat;
  background-position: 110% -10%;
  background-size: 600px;
  opacity: 0.04;
  pointer-events: none;
}
.hero .grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 72px;
  align-items: center;
}
.hero h1 strong { color: var(--accent); font-weight: 600; }
.hero .ctas { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero .install {
  margin-top: 32px;
  display: inline-block;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
}
.hero .install::before { content: "$ "; color: var(--mute-2); }
.hero .badge-wrap { display: flex; justify-content: center; }
.hero .badge-wrap img { width: 100%; max-width: 360px; height: auto; }

/* ----- Pillars (three-feature row) ------------------------------------- */
.pillars { background: var(--paper-2); }
.pillars .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.pillar {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 28px;
}
.pillar .icon-frame {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.pillar .icon-frame .icon { width: 24px; height: 24px; }

/* ----- Terminal demo ---------------------------------------------------- */
.terminal {
  background: #0B1F3A;
  border-radius: 12px;
  border: 1px solid #14305A;
  font-family: var(--mono);
  font-size: 14px;
  color: #CBD5E1;
  overflow: hidden;
}
.terminal .bar {
  background: #14305A;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.terminal .bar .dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: #475569;
}
.terminal .bar .dot.r { background: #DC2626; }
.terminal .bar .dot.y { background: #F59E0B; }
.terminal .bar .dot.g { background: #10B981; }
.terminal .bar .title {
  margin-left: 12px;
  font-size: 12px;
  color: var(--mute-2);
}
.terminal pre {
  margin: 0;
  padding: 24px;
  white-space: pre;
  overflow-x: auto;
}
.t-pass { color: #10B981; }
.t-fail { color: #F87171; }
.t-warn { color: #FBBF24; }
.t-skip { color: #60A5FA; }
.t-mute { color: var(--mute-2); }

/* ----- Feature grid ----------------------------------------------------- */
.features .grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature {
  display: flex; gap: 16px; align-items: flex-start;
}
.feature .icon-frame {
  flex: 0 0 40px;
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--paper-2);
  color: var(--accent);
  border: 1px solid var(--rule);
  display: inline-flex; align-items: center; justify-content: center;
}
.feature .icon-frame .icon { width: 22px; height: 22px; }
.feature h3 { margin-bottom: 4px; }
.feature p { font-size: 16px; }

/* ----- Frameworks strip ------------------------------------------------- */
.frameworks {
  background: var(--ink);
  color: var(--paper);
  padding: 72px 0;
}
.frameworks h2, .frameworks p { color: var(--paper); }
.frameworks p { color: rgba(255,255,255,0.7); }
.frameworks .strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.fw-pill {
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.04);
}
.fw-pill.accent { border-color: var(--accent); color: var(--accent); }

/* ----- Pricing ---------------------------------------------------------- */
.pricing .grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tier {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 32px;
  display: flex;
  flex-direction: column;
}
.tier.featured {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
  position: relative;
}
.tier.featured h3, .tier.featured .price, .tier.featured ul { color: var(--paper); }
.tier.featured .price small { color: rgba(255,255,255,0.7); }
.tier.featured .ribbon {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent);
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
}
.tier .price {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 600;
  color: var(--ink);
  margin: 16px 0 8px;
}
.tier .price small {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 400;
  color: var(--mute);
}
.tier ul {
  list-style: none;
  padding: 0;
  margin: 16px 0 28px 0;
  flex: 1;
}
.tier li {
  padding: 8px 0;
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--mute);
  border-bottom: 1px solid var(--rule);
}
.tier.featured li { color: rgba(255,255,255,0.85); border-bottom-color: rgba(255,255,255,0.1); }
.tier li::before {
  content: "";
  width: 18px; height: 18px;
  flex: 0 0 18px;
  background-image: url("icons/shield.svg");
  background-size: contain;
  background-repeat: no-repeat;
  margin-top: 3px;
  filter: invert(60%) sepia(60%) saturate(400%) hue-rotate(115deg);
}
.tier .btn { align-self: stretch; justify-content: center; }

/* ----- Origin story ----------------------------------------------------- */
.origin {
  background: var(--paper-2);
}
.origin .grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 56px;
  align-items: center;
}
.origin blockquote {
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.4;
  font-weight: 500;
  color: var(--ink);
  margin: 0;
  padding: 0;
  position: relative;
  padding-left: 28px;
  border-left: 3px solid var(--accent);
}
.origin .stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 24px; }
.origin .stat { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 16px; }
.origin .stat .n { font-family: var(--serif); font-size: 28px; color: var(--ink); font-weight: 600; }
.origin .stat .l { font-size: 13px; color: var(--mute); margin-top: 4px; }

/* ----- Final CTA -------------------------------------------------------- */
.cta-final {
  background: var(--ink);
  color: var(--paper);
  text-align: center;
}
.cta-final h2 { color: var(--paper); font-size: 44px; }
.cta-final p { color: rgba(255,255,255,0.7); }
.cta-final .ctas { display: flex; gap: 12px; justify-content: center; margin-top: 28px; flex-wrap: wrap; }
.cta-final .btn-ghost { color: var(--paper); border-color: rgba(255,255,255,0.3); }
.cta-final .btn-ghost:hover { border-color: var(--paper); }

/* ----- Footer ----------------------------------------------------------- */
footer.site {
  padding: 48px 0;
  background: var(--paper);
  color: var(--mute);
  font-size: 14px;
  border-top: 1px solid var(--rule);
}
footer.site .grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
footer.site h4 { color: var(--ink); font-size: 14px; letter-spacing: 1px; text-transform: uppercase; margin: 0 0 12px 0; font-family: var(--sans); }
footer.site ul { list-style: none; padding: 0; margin: 0; }
footer.site li { padding: 4px 0; }
footer.site a { color: var(--mute); }
footer.site .colophon {
  margin-top: 48px;
  border-top: 1px solid var(--rule);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--mute-2);
}

/* ----- Responsive ------------------------------------------------------- */
@media (max-width: 900px) {
  h1 { font-size: 40px; }
  h2 { font-size: 28px; }
  .hero .grid, .pillars .grid, .features .grid, .pricing .grid, .origin .grid, footer.site .grid {
    grid-template-columns: 1fr;
  }
  section { padding: 64px 0; }
  header.site nav { display: none; }
}

/* Inline icon helper — every <svg class="icon"> takes currentColor. */
.icon { display: inline-block; vertical-align: middle; }