/* Tokens from the Corvyn Systems design system, theme "Raven & Verdigris". */
:root {
  --bg: #f8f6f1;
  --surface: #ffffff;
  --ink: #171b1d;
  --ink-muted: #545c60;
  --border: #e2dfd8;
  --border-strong: #878d90;
  --accent: #1d6358;
  --accent-hover: #164c44;
  --accent-text: #1d6358;
  --on-accent: #ffffff;

  --dark-bg: #141a19;
  --dark-surface: #1c2423;
  --dark-ink: #eeefe9;
  --dark-ink-muted: #a5afab;
  --dark-border: #2b3533;
  --dark-border-strong: #6c7a77;
  --dark-accent: #8fbfb2;
  --dark-accent-hover: #a6cec3;
  --dark-on-accent: #141a19;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --space-2: 8px;
  --space-4: 16px;
  --space-6: 24px;
  --space-12: 48px;
  --space-24: 96px;

  --max: 1120px;
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 26px;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { margin: 0 0 .5em; font-weight: 600; }
h1 { font-size: 52px; line-height: 58px; letter-spacing: -0.015em; max-width: 18ch; }
h2 { font-size: 32px; line-height: 38px; letter-spacing: -0.01em; max-width: 24ch; }
h3 { font-size: 19px; line-height: 26px; }
p { margin: 0 0 1em; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 2px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--space-12); }
.eyebrow {
  font-family: var(--font-mono); font-size: 12px; line-height: 16px; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent-text); margin-bottom: var(--space-4);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 20px; border-radius: var(--radius-md);
  font-family: inherit; font-size: 15px; line-height: 20px; font-weight: 600;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { border-color: var(--border-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-small { padding: 8px 14px; font-size: 14px; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; font-size: 17px; }
.brand-mark { height: 34px; width: auto; }
.nav-links { display: flex; align-items: center; gap: var(--space-6); }
.nav-links a:not(.btn) { text-decoration: none; color: var(--ink-muted); font-size: 15px; }
.nav-links a:not(.btn):hover { color: var(--ink); }

/* Hero */
.hero { padding: var(--space-24) 0; }
.lede { font-size: 19px; line-height: 30px; color: var(--ink-muted); max-width: 58ch; margin: var(--space-6) 0 36px; }
.cta-row { display: flex; flex-wrap: wrap; gap: var(--space-4); }

/* Problem strip */
.problem { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--surface); }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.problem-item { padding: 36px 28px 28px; border-left: 1px solid var(--border); }
.problem-item:first-child { border-left: 0; padding-left: 0; }
.problem-item p { color: var(--ink-muted); margin: 0; }

/* Sections */
.section { padding: var(--space-24) 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-lede { font-size: 19px; line-height: 30px; color: var(--ink-muted); max-width: 62ch; margin-bottom: 40px; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); margin-top: 40px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 32px; display: flex; flex-direction: column;
}
.card-num { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; color: var(--accent-text); margin-bottom: 12px; }
.card p { color: var(--ink-muted); }
.card ul { margin: auto 0 0; padding: var(--space-4) 0 0; list-style: none; border-top: 1px solid var(--border); }
.card li { padding: 4px 0 4px 18px; position: relative; font-size: 15px; color: var(--ink-muted); }
.card li::before { content: ""; position: absolute; left: 0; top: 15px; width: 6px; height: 6px; background: var(--accent); }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
.steps li { counter-increment: step; border-top: 2px solid var(--ink); padding-top: 20px; }
.steps li::before { content: "0" counter(step); display: block; font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; color: var(--accent-text); margin-bottom: 10px; }
.steps p { color: var(--ink-muted); margin: 0; }

.about-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: var(--space-12); }
.about-body p { font-size: 19px; line-height: 30px; color: var(--ink-muted); }

/* Dark sections: dark-* tokens only */
.section-dark { background: var(--dark-bg); color: var(--dark-ink); }
.section-dark .eyebrow { color: var(--dark-accent); }
.section-dark p { color: var(--dark-ink-muted); }
.section-dark :focus-visible { outline-color: var(--dark-accent); }
.section-dark .btn-primary { background: var(--dark-accent); color: var(--dark-on-accent); }
.section-dark .btn-primary:hover { background: var(--dark-accent-hover); }
.btn-ghost-light { border-color: var(--dark-border-strong); color: var(--dark-ink); }
.btn-ghost-light:hover { border-color: var(--dark-ink); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.cta-col { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-4); margin-top: 32px; }

.form { background: var(--dark-surface); border: 1px solid var(--dark-border); border-radius: var(--radius-lg); padding: 32px; display: grid; gap: var(--space-4); }
.section-dark .form-intro { margin: 0; color: var(--dark-ink); font-weight: 600; font-size: 19px; line-height: 26px; }
.form label { display: grid; gap: var(--space-2); font-size: 14px; line-height: 22px; color: var(--dark-ink-muted); }
.form input, .form select, .form textarea {
  font: inherit; font-size: 16px; color: var(--dark-ink); background: var(--dark-bg);
  border: 1px solid var(--dark-border-strong); border-radius: var(--radius-sm); padding: 10px 12px; width: 100%;
}
.form textarea { resize: vertical; }
.form ::placeholder { color: var(--dark-ink-muted); }
.form .btn { justify-self: start; }
.form-status { margin: 0; font-size: 14px; min-height: 22px; }
.hp { position: absolute; left: -9999px; }

.footer { background: var(--dark-bg); color: var(--dark-ink-muted); border-top: 1px solid var(--dark-border); font-size: 14px; line-height: 22px; }
.footer-inner { display: flex; justify-content: space-between; padding-top: var(--space-6); padding-bottom: var(--space-6); gap: var(--space-4); flex-wrap: wrap; }
.footer-inner { align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--dark-ink); }

/* Responsive */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .contact-grid, .about-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 680px) {
  .wrap { padding: 0 var(--space-4); }
  h1 { font-size: 36px; line-height: 42px; }
  h2 { font-size: 28px; line-height: 34px; }
  .nav-links a:not(.btn) { display: none; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .problem-grid { grid-template-columns: 1fr; }
  .problem-item, .problem-item:first-child { border-left: 0; padding: var(--space-6) 0; border-top: 1px solid var(--border); }
  .problem-item:first-child { border-top: 0; }
  .steps { grid-template-columns: 1fr; }
  .card, .form { padding: var(--space-6); }
  .cta-row .btn { width: 100%; }
}