@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Inter:wght@400;500&display=swap');

:root {
  --bg: #0a0a0a;
  --bg-subtle: #111111;
  --border: #222222;
  --text: #e5e5e5;
  --text-muted: #888888;
  --white: #ffffff;
  /* Terminal-green accent — a deliberate break from the grayscale-only palette
     of lookalike sites. Used sparingly: CTA, link hover, section markers. */
  --accent: #34d399;
  --accent-ink: #07120c;

  --font-mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, monospace;
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;

  --max-width: 760px;
  --section-gap: 80px;
  --section-gap-sm: 48px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Typography ─────────────────────────────────── */

h1, h2, h3 {
  font-family: var(--font-mono);
  color: var(--white);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

p {
  color: var(--text);
  line-height: 1.7;
}

a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a:hover {
  color: var(--accent);
}

/* ─── Header ─────────────────────────────────────── */

header {
  padding: 40px 0 80px;
}

.brand {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.08em;
  text-decoration: none;
}

.brand:hover {
  color: var(--white);
}

.brand-cursor {
  color: var(--accent);
  margin-left: 2px;
  animation: brand-blink 1.1s steps(1) infinite;
}

@keyframes brand-blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .brand-cursor { animation: none; }
}

/* ─── Hero ───────────────────────────────────────── */

.hero {
  padding-bottom: var(--section-gap);
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 20px;
  max-width: 600px;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 1.0625rem;
  max-width: 480px;
  margin-bottom: 36px;
}

.hero-sub br {
  display: block;
  content: '';
  margin-top: 4px;
}

/* ─── Waitlist Form ──────────────────────────────── */

.waitlist-form {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  max-width: 480px;
}

.waitlist-form input[type="email"] {
  flex: 1;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  padding: 10px 14px;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.15s;
  min-width: 0;
}

.waitlist-form input[type="email"]::placeholder {
  color: var(--text-muted);
}

.waitlist-form input[type="email"]:focus {
  border-color: var(--accent);
}

.waitlist-form button {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.waitlist-form button:hover {
  opacity: 0.88;
}

.waitlist-form button:disabled {
  background: #1b3b2c;
  color: #5f8c76;
  opacity: 1;
  cursor: not-allowed;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.form-confirmation {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--accent);
  padding: 12px 0;
}

.form-confirmation::before {
  content: '> ';
  color: var(--accent);
}

.form-error {
  display: none;
  font-size: 0.8125rem;
  color: #f87171;
  margin-top: 8px;
}

/* ─── Sections ───────────────────────────────────── */

section {
  padding-bottom: var(--section-gap);
}

.section-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.section-heading::before {
  content: '// ';
  color: var(--accent);
}

/* ─── Problem ────────────────────────────────────── */

.problem-body p + p {
  margin-top: 20px;
}

/* ─── What Stratum Does ──────────────────────────── */

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.column {
  padding: 28px 32px;
}

.column + .column {
  border-left: 1px solid var(--border);
}

.column-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.column-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.column-item {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);
}

.column-item h3 {
  color: var(--white);
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  margin-bottom: 3px;
}

/* ─── Pillars (positioning trifecta) ─────────────── */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--border);
  margin-top: 24px;
}

.pillar {
  background: var(--bg);
  padding: 24px 22px;
}

.pillar h3 {
  font-size: 0.9375rem;
  color: var(--white);
  margin-bottom: 8px;
}

.pillar p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ─── Comparison table (vs closed forges) ────────── */

.compare-wrap {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow-x: auto;
  margin-top: 24px;
}

.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.compare th,
.compare td {
  text-align: left;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  vertical-align: top;
}

.compare thead th {
  border-top: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.compare tbody th {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--white);
  white-space: nowrap;
}

.compare td {
  color: var(--text-muted);
}

.compare td.yes {
  color: var(--text);
}

.compare td.yes::before {
  content: '→ ';
  color: var(--accent);
}

.compare tbody th,
.compare td + td {
  border-left: 1px solid var(--border);
}

/* ─── FAQ ────────────────────────────────────────── */

.faq {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.faq-item h3 {
  font-size: 0.9375rem;
  color: var(--white);
  margin-bottom: 6px;
}

.faq-item p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* ─── Closing CTA ────────────────────────────────── */

.cta-title {
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  margin-bottom: 12px;
}

.cta-body {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 520px;
  margin-bottom: 24px;
}

.cta-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-button {
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 11px 22px;
  border-radius: 4px;
  text-decoration: none;
  transition: opacity 0.15s;
}

.cta-button:hover {
  color: var(--accent-ink);
  opacity: 0.88;
}

.cta-secondary {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ─── Open Source ────────────────────────────────── */

.oss-body {
  margin-bottom: 20px;
}

.oss-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.oss-link:hover {
  color: var(--accent);
}

/* ─── Footer ─────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-left {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-left a {
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-left a:hover {
  color: var(--accent);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-cf {
  font-size: 0.8125rem;
  color: var(--text-muted);
  width: 100%;
}

/* ─── Divider ────────────────────────────────────── */

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin-bottom: var(--section-gap);
}

/* ─── Responsive ─────────────────────────────────── */

@media (max-width: 600px) {
  :root {
    --section-gap: 56px;
  }

  header {
    padding: 28px 0 56px;
  }

  .waitlist-form {
    flex-direction: column;
  }

  .waitlist-form button {
    width: 100%;
    padding: 12px 20px;
  }

  .columns {
    grid-template-columns: 1fr;
  }

  .pillars {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    letter-spacing: 0;
  }

  .column + .column {
    border-left: none;
    border-top: 1px solid var(--border);
  }

  .column {
    padding: 24px 20px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}