/* ============================================================
   SimSlate marketing pages — shared stylesheet
   Semantic accent system: --lev (leverage green) vs --chalk
   (chalk amber). Green marks *your* edge, amber marks the field.
   ============================================================ */

:root {
  --ink-0: #1e1c1a;   /* page */
  --ink-1: #262421;   /* raised surface */
  --ink-2: #2e2b27;   /* card */
  --line: #3b3833;    /* hairline */
  --line-2: #47433d;
  --paper: #f4f1ec;
  --dim: #a8a299;
  --faint: #8d877d;
  --lev: #ff7a1a;     /* leverage green */
  --lev-deep: #c95f12;
  --chalk: #ffb01a;   /* chalk amber */
  --max-w: 1180px;
  --font-d: "Chivo", system-ui, sans-serif;
  --font-m: "Chivo Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  background: var(--ink-0);
  color: var(--paper);
  font-family: var(--font-d);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip; /* decorative hero elements may extend past the edge */
}

::selection { background: rgba(255,122,26, 0.25); }

a { color: inherit; }
:focus-visible { outline: 2px solid var(--lev); outline-offset: 2px; border-radius: 2px; }

img, svg, canvas { max-width: 100%; display: block; }

.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }

/* ---------- type voices ---------- */
.display {
  font-family: var(--font-d);
  font-weight: 800;
  font-stretch: 118%;
  text-transform: uppercase;
  letter-spacing: 0.005em;
  line-height: 0.98;
}
.mono {
  font-family: var(--font-m);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
}
.tnum { font-variant-numeric: tabular-nums; font-family: var(--font-m); }

.eyebrow { color: var(--lev); }
.eyebrow--chalk { color: var(--chalk); }
.eyebrow--dim { color: var(--faint); }

/* ---------- nav (two rows: wordmark + auth above, primary links below) ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--ink-0) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-top {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  height: 54px;
}
.nav-auth { display: flex; gap: 10px; align-items: center; }
.wordmark {
  font-family: var(--font-d);
  font-weight: 800; font-stretch: 125%;
  text-transform: uppercase; letter-spacing: 0.02em;
  font-size: 1.02rem; text-decoration: none;
  display: flex; align-items: baseline; gap: 2px;
}
.wordmark em { font-style: normal; color: var(--lev); }
.nav-main { border-top: 1px solid var(--line); }

/* free-plan teaser in the nav-top dead space (hidden when it can't breathe) */
.nav-free {
  display: flex; align-items: center; gap: 12px;
  min-width: 0; margin: 0 auto; padding: 0 14px;
  text-decoration: none;
}
.nav-free-tag {
  flex: none; font-family: var(--font-m); font-size: 0.6rem; letter-spacing: 0.14em;
  text-transform: uppercase; font-weight: 600;
  color: var(--ink-0); background: var(--lev);
  padding: 3px 9px; border-radius: 999px;
}
.nav-free-copy {
  font-size: 0.78rem; color: var(--dim);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nav-free-copy b { color: var(--paper); font-weight: 600; }
.nav-free-go {
  flex: none; font-family: var(--font-m); font-size: 0.66rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--lev); white-space: nowrap;
}
.nav-free:hover .nav-free-copy { color: var(--paper); }
@media (max-width: 1080px) { .nav-free { display: none; } }

.nav-links {
  display: flex; gap: 24px; align-items: center; height: 46px;
  overflow-x: auto; scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  font-family: var(--font-m); font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; text-decoration: none; color: var(--dim);
  padding: 6px 2px; white-space: nowrap;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--paper); }
.nav-links a[aria-current="page"] { box-shadow: 0 2px 0 var(--lev); }
.nav-links a.nav-product { color: var(--paper); font-weight: 600; }
.nav-links a.nav-product::before { content: "▸ "; color: var(--lev); }
.nav-links a.nav-product:hover { color: var(--lev); }
.nav-sep { width: 1px; height: 16px; background: var(--line-2); flex: none; }

/* Tools dropdown. .nav-links is a horizontal scroll container, so the menu
   must NOT have a positioned ancestor inside it — anchoring to .nav-main
   lets it escape the overflow clip on small screens. */
.nav-main { position: relative; }
.nav-dd { flex: none; }
.nav-dd summary {
  font-family: var(--font-m); font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--dim);
  padding: 6px 2px; white-space: nowrap; cursor: pointer;
  list-style: none; user-select: none;
}
.nav-dd summary::-webkit-details-marker { display: none; }
.nav-dd summary::after { content: " ▾"; color: var(--faint); }
.nav-dd summary:hover, .nav-dd[open] summary { color: var(--paper); }
.nav-dd-menu {
  position: absolute; top: 100%; left: 28px; z-index: 60;
  min-width: 220px; padding: 6px 0; margin-top: -1px;
  background: var(--ink-1); border: 1px solid var(--line-2); border-radius: 3px;
}
.nav-dd-menu a {
  display: block; padding: 10px 16px;
  font-family: var(--font-m); font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; text-decoration: none; color: var(--dim);
}
.nav-dd-menu a:hover { color: var(--paper); background: var(--ink-2); }
@media (min-width: 641px) {
  /* the full link row fits, so the scroll clip can be lifted and the menu
     anchored directly under the Tools trigger */
  .nav-links { overflow: visible; }
  .nav-dd { position: relative; }
  .nav-dd-menu { left: 0; }
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-m); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none;
  padding: 12px 22px; border-radius: 3px; border: 1px solid transparent;
  cursor: pointer; transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn--solid, .nav-links a.btn--solid { background: var(--lev); color: #2a1a0c; }
.btn--solid:hover, .nav-links a.btn--solid:hover { background: #ff9540; color: #2a1a0c; }
.btn--ghost { border-color: var(--line-2); color: var(--paper); }
.btn--ghost:hover { border-color: var(--lev); color: var(--lev); }
.btn--nav { padding: 9px 16px; }

/* ---------- section scaffolding ---------- */
.section { padding: 104px 0; border-top: 1px solid var(--line); }
.section--flush { border-top: none; }

.sec-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 48px; flex-wrap: wrap; }
.sec-head .rule { flex: 1; height: 1px; background: var(--line); align-self: center; min-width: 60px; }

h1, h2, h3 { font-weight: 800; }
.h-xl { font-size: clamp(1.9rem, 7.2vw, 5.6rem); }
.h-lg { font-size: clamp(2rem, 4.4vw, 3.3rem); }
.h-md { font-size: clamp(1.35rem, 2.4vw, 1.8rem); }

.lede { color: var(--dim); font-size: 1.1rem; max-width: 34em; }
p { color: var(--dim); }
p strong { color: var(--paper); font-weight: 600; }
.ink { color: var(--paper); }
.lev { color: var(--lev); }
.chalk { color: var(--chalk); }

/* ---------- stat rail ---------- */
.rail {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: var(--ink-1);
}
.rail-inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.rail-cell {
  padding: 26px 28px; border-left: 1px solid var(--line);
}
.rail-cell:first-child { border-left: none; }
.rail-num {
  font-family: var(--font-m); font-weight: 600;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem); color: var(--paper);
  font-variant-numeric: tabular-nums; line-height: 1.1;
}
.rail-num em { font-style: normal; color: var(--lev); }
.rail-label { margin-top: 6px; color: var(--faint); }

/* ---------- cards ---------- */
.card {
  background: var(--ink-2); border: 1px solid var(--line);
  border-radius: 6px; padding: 30px;
}
.card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.card p { font-size: 0.94rem; }

/* ---------- phase blocks (landing) ---------- */
.phase {
  display: grid; grid-template-columns: 130px 1fr 1fr; gap: 40px;
  padding: 56px 0; border-top: 1px solid var(--line);
}
.phase:first-of-type { border-top: none; }
.phase-no {
  font-family: var(--font-m); font-weight: 300;
  font-size: 3.4rem; line-height: 1; color: var(--faint);
}
.phase-no b { color: var(--lev); font-weight: 300; }
.phase h3 { font-size: 1.5rem; margin: 4px 0 14px; }
.phase p { font-size: 0.97rem; max-width: 32em; }
.phase-fig { align-self: center; }

/* ---------- versus table ---------- */
.versus { border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.versus-row { display: grid; grid-template-columns: 1.1fr 1fr 1fr; }
.versus-row > div { padding: 20px 24px; border-top: 1px solid var(--line); font-size: 0.94rem; }
.versus-row:first-child > div { border-top: none; }
.versus-row > div:nth-child(2), .versus-row > div:nth-child(3) { border-left: 1px solid var(--line); }
.versus-head > div { background: var(--ink-1); padding: 14px 24px !important; }
.versus .them { color: var(--faint); }
.versus .us { color: var(--paper); }
.versus .us::before { content: "▸ "; color: var(--lev); }
.versus .dim-label { color: var(--dim); font-weight: 600; }

/* ---------- article layout (methodology / edge) ---------- */
.article-grid {
  display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 72px;
  padding-top: 88px; padding-bottom: 120px;
}
.toc { position: sticky; top: 100px; align-self: start; }
.toc ol { list-style: none; display: flex; flex-direction: column; gap: 4px; margin-top: 16px; }
.toc a {
  display: flex; gap: 12px; align-items: baseline; text-decoration: none;
  color: var(--faint); padding: 7px 0; font-size: 0.85rem;
  border-left: 2px solid transparent; padding-left: 14px; margin-left: -16px;
  transition: color 0.15s;
}
.toc a:hover { color: var(--paper); }
.toc a.active { color: var(--lev); border-left-color: var(--lev); }
.toc .n { font-family: var(--font-m); font-size: 0.68rem; letter-spacing: 0.08em; }

.prose h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 18px;
  scroll-margin-top: 100px;
}
.prose > section { padding: 56px 0; border-top: 1px solid var(--line); }
.prose > section:first-child { padding-top: 0; border-top: none; }
.prose p { margin-bottom: 16px; max-width: 44em; }
.prose ul { margin: 0 0 16px 1.2em; color: var(--dim); max-width: 42em; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--lev); }
.prose .mono { display: block; margin-bottom: 10px; }

.callout {
  border-left: 2px solid var(--lev);
  background: var(--ink-1);
  padding: 18px 22px; margin: 26px 0; border-radius: 0 6px 6px 0;
  max-width: 44em;
}
.callout--chalk { border-left-color: var(--chalk); }
.callout p { margin: 0; font-size: 0.94rem; }

.fig {
  border: 1px solid var(--line); border-radius: 6px; background: var(--ink-1);
  padding: 24px; margin: 28px 0;
}
.fig-cap {
  margin-top: 14px; color: var(--faint);
  font-family: var(--font-m); font-size: 0.7rem; letter-spacing: 0.1em;
  text-transform: uppercase;
}

kbd, code {
  font-family: var(--font-m); font-size: 0.85em;
  background: var(--ink-2); border: 1px solid var(--line);
  padding: 1px 6px; border-radius: 4px; color: var(--paper);
}

/* ---------- CTA band ---------- */
.cta-band { padding: 110px 0; text-align: center; border-top: 1px solid var(--line); position: relative; overflow: hidden; }
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { margin: 0 auto 34px; max-width: 36em; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); background: var(--ink-1); }
.footer-inner {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  padding-top: 34px; padding-bottom: 34px; color: var(--faint); font-size: 0.85rem;
}
.footer-inner .spacer { flex: 1; }
.footer a { color: var(--faint); text-decoration: none; }
.footer a:hover { color: var(--paper); }

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .phase { grid-template-columns: 1fr; gap: 18px; }
  .phase-fig { max-width: 480px; }
  .article-grid { grid-template-columns: 1fr; gap: 40px; }
  .toc { position: static; }
  .rail-inner { grid-template-columns: repeat(2, 1fr); }
  .rail-cell:nth-child(3) { border-left: none; }
  .rail-cell { border-top: 1px solid var(--line); }
  .rail-cell:nth-child(-n+2) { border-top: none; }
}
@media (max-width: 640px) {
  .nav-top { height: 50px; }
  .nav-links { gap: 18px; height: 42px; }
  .btn--nav { padding: 7px 12px; font-size: 0.66rem; }
  .versus-row { grid-template-columns: 1fr; }
  .versus-row > div:nth-child(2), .versus-row > div:nth-child(3) { border-left: none; border-top: 1px solid var(--line); }
  .versus-head { display: none; }
  .versus .them::before { content: "TYPICAL OPTIMIZER — "; font-family: var(--font-m); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--faint); }
  .versus--sims .them::before { content: "OTHER SIM TOOLS — "; }
  .versus .us::before { content: "▸ SIMSLATE — "; font-family: var(--font-m); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--lev); }
  .section { padding: 72px 0; }
}

/* ---------- waitlist capture (Field Report) ---------- */
.wl { border-top: 1px solid var(--line); background: var(--ink-1); }
.wl-inner { padding: 64px 0; text-align: center; }
.wl-inner h2 { margin: 14px 0 10px; }
.wl-inner p { max-width: 40em; margin: 0 auto 26px; color: var(--dim); }
.wl-form { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.wl-form input[type="email"] {
  background: var(--ink-2); border: 1px solid var(--line-2); border-radius: 3px;
  color: var(--paper); font-family: var(--font-m); font-size: 0.85rem;
  padding: 12px 16px; width: min(340px, 90vw);
}
.wl-form input[type="email"]::placeholder { color: var(--faint); }
.wl-form input[type="email"]:focus { outline: 2px solid var(--lev); outline-offset: 0; border-color: transparent; }
.wl-msg { display: block; margin-top: 14px; font-family: var(--font-m); font-size: 0.78rem; letter-spacing: 0.06em; min-height: 1.2em; }