/* ------------------------------------------------------------------
   Vellum Secondaries — design system
   Dark, precise, institutional. One accent, used sparingly.
------------------------------------------------------------------- */

:root {
  --bg: #0b0d11;
  --bg-raised: #11141a;
  --bg-panel: #14181f;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --ink: #e8e6e1;
  --ink-dim: #a3a49e;
  --ink-faint: #6f7169;
  --accent: #c8a96e;
  --accent-dim: rgba(200, 169, 110, 0.55);
  --accent-wash: rgba(200, 169, 110, 0.07);
  --danger: #d4766a;
  --max: 1120px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-dim); color: #0b0d11; }

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

a { color: inherit; text-decoration: none; }

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

/* ---------- type ---------- */

h1, h2, h3 {
  font-weight: 550;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
}

h1 { font-size: clamp(2.3rem, 5.4vw, 3.9rem); font-weight: 600; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.55rem, 3vw, 2.15rem); }
h3 { font-size: 1.08rem; font-weight: 600; letter-spacing: -0.01em; }

p { color: var(--ink-dim); }

strong { color: var(--ink); font-weight: 600; }

.eyebrow {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.lede {
  font-size: 1.13rem;
  line-height: 1.7;
  color: var(--ink-dim);
  max-width: 40em;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 13, 17, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.wordmark {
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
}

.wordmark span { color: var(--accent); }

.site-nav { display: flex; align-items: center; gap: 34px; }

.site-nav a {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--ink-dim);
  transition: color 0.18s ease;
}

.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); }

.site-nav .nav-cta {
  color: var(--bg);
  background: var(--ink);
  padding: 9px 18px;
  border-radius: 3px;
  font-weight: 600;
  transition: background 0.18s ease;
}

.site-nav .nav-cta:hover { background: #fff; color: var(--bg); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  color: var(--ink);
  width: 40px;
  height: 36px;
  font-size: 1.05rem;
  cursor: pointer;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 13px 26px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn-primary { background: var(--accent); color: #14110a; }
.btn-primary:hover { background: #d9bc85; }

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--accent-dim); color: var(--accent); }

/* ---------- sections ---------- */

section { padding: 96px 0; }

.section-line { border-top: 1px solid var(--line); }

.section-head { max-width: 620px; margin-bottom: 56px; }
.section-head p { margin-top: 16px; }

/* ---------- hero ---------- */

.hero {
  padding: 130px 0 110px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 48% at 78% 8%, rgba(200, 169, 110, 0.06), transparent 70%);
}

.hero .wrap { position: relative; z-index: 1; }

.hero h1 { max-width: 15em; }

.hero .lede { margin-top: 26px; }

.hero-actions { margin-top: 42px; display: flex; gap: 14px; flex-wrap: wrap; }

.hero-note {
  margin-top: 60px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  max-width: 46em;
  font-size: 0.9rem;
  color: var(--ink-faint);
}

/* ---------- cards / grids ---------- */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

.card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 30px 26px;
  transition: border-color 0.25s ease;
}

.card:hover { border-color: var(--line-strong); }

.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.93rem; }

.card .kicker {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}

/* ---------- steps ---------- */

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }

.step {
  border-top: 1px solid var(--line-strong);
  padding-top: 22px;
  position: relative;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}

.step h3 { margin-bottom: 8px; font-size: 1rem; }
.step p { font-size: 0.9rem; }

/* ---------- honest math ---------- */

.honest {
  background: var(--bg-raised);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.honest-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
  gap: 70px;
  align-items: start;
}

.honest-points { display: grid; gap: 0; }

.honest-point {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.honest-point:first-child { border-top: 1px solid var(--line); }

.honest-point h3 { font-size: 0.98rem; margin-bottom: 6px; }
.honest-point p { font-size: 0.92rem; }

/* ---------- CTA band ---------- */

.cta-band { text-align: left; }

.cta-band .inner {
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 64px 56px;
  background:
    linear-gradient(120deg, var(--accent-wash), transparent 55%),
    var(--bg-raised);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-band h2 { max-width: 16em; }
.cta-band p { margin-top: 12px; max-width: 34em; }

/* ---------- diagram ---------- */

.diagram-panel {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-raised);
  padding: 48px 36px;
  overflow-x: auto;
}

/* ---------- prose pages ---------- */

.page-head { padding: 96px 0 64px; border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(2rem, 4.4vw, 3rem); max-width: 18em; }
.page-head .lede { margin-top: 22px; }

.prose { max-width: 680px; }
.prose h2 { margin: 56px 0 18px; font-size: 1.45rem; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 18px; }
.prose ul { margin: 0 0 18px 20px; color: var(--ink-dim); }
.prose li { margin-bottom: 10px; padding-left: 6px; }
.prose li::marker { color: var(--accent); }

.aside-note {
  border-left: 2px solid var(--accent);
  background: var(--accent-wash);
  padding: 20px 24px;
  border-radius: 0 4px 4px 0;
  margin: 30px 0;
}
.aside-note p { margin: 0; font-size: 0.93rem; }

/* ---------- FAQ ---------- */

.faq-list { max-width: 760px; }

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 26px 44px 26px 0;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--ink);
  position: relative;
  transition: color 0.18s ease;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--accent);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }

.faq-item summary:hover { color: var(--accent); }

.faq-body { padding: 0 0 28px; max-width: 660px; }
.faq-body p { margin-bottom: 14px; font-size: 0.96rem; }
.faq-body p:last-child { margin-bottom: 0; }

/* ---------- contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 5fr);
  gap: 72px;
  align-items: start;
}

.contact-aside h2 { margin-bottom: 18px; }
.contact-aside p { margin-bottom: 16px; font-size: 0.97rem; }

.contact-direct {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  color: var(--ink-faint);
}

.contact-direct a { color: var(--accent); }
.contact-direct a:hover { text-decoration: underline; }

.form-panel {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 42px 40px;
}

.field { margin-bottom: 24px; }

.field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 9px;
  color: var(--ink);
}

.field .optional { color: var(--ink-faint); font-weight: 400; }

.field input,
.field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--ink);
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 13px 14px;
  transition: border-color 0.18s ease;
}

.field textarea { min-height: 130px; resize: vertical; }

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.field input::placeholder,
.field textarea::placeholder { color: var(--ink-faint); }

.field .error-msg {
  display: none;
  margin-top: 8px;
  font-size: 0.83rem;
  color: var(--danger);
}

.field.has-error input,
.field.has-error textarea { border-color: var(--danger); }
.field.has-error .error-msg { display: block; }

.form-footer { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }

.form-privacy { font-size: 0.8rem; color: var(--ink-faint); max-width: 26em; }

.form-error-banner {
  display: none;
  margin-bottom: 22px;
  padding: 14px 16px;
  border: 1px solid rgba(212, 118, 106, 0.4);
  border-radius: 4px;
  background: rgba(212, 118, 106, 0.08);
  color: var(--danger);
  font-size: 0.88rem;
}
.form-error-banner.visible { display: block; }

.form-success { display: none; text-align: left; padding: 20px 0; }
.form-success.visible { display: block; }

.form-success .check {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.15rem;
  margin-bottom: 22px;
}

.form-success h3 { font-size: 1.25rem; margin-bottom: 12px; }
.form-success p { font-size: 0.95rem; margin-bottom: 10px; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 56px 0 44px;
  margin-top: 40px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.footer-grid .wordmark { font-size: 0.85rem; }

.footer-nav { display: flex; gap: 28px; flex-wrap: wrap; }

.footer-nav a { font-size: 0.85rem; color: var(--ink-dim); }
.footer-nav a:hover { color: var(--ink); }

.footer-legal {
  border-top: 1px solid var(--line);
  padding-top: 28px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink-faint);
  max-width: 62em;
}

.footer-legal p + p { margin-top: 10px; }

/* ---------- reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in { opacity: 1; transform: none; }

.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .grid-4, .steps { grid-template-columns: 1fr 1fr; }
  .honest-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .cta-band .inner { padding: 48px 36px; }
}

@media (max-width: 640px) {
  section { padding: 68px 0; }
  .hero { padding: 88px 0 76px; }
  .grid-2, .grid-4, .steps { grid-template-columns: 1fr; }

  .nav-toggle { display: block; }

  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--line);
    padding: 8px 0 16px;
  }

  .site-nav.open { display: flex; }

  .site-nav a { padding: 13px 28px; }

  .site-nav .nav-cta {
    margin: 10px 28px 0;
    text-align: center;
    border-radius: 3px;
  }

  .form-panel { padding: 30px 22px; }
}