/* ================================================================
   CircuitMind Landing Page — Light editorial aesthetic
   Bloomberg terminal meets indie maker newsletter.
   Background: warm off-white. No gradients. No stock photos.
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --bg: #f7f5f0;
  --bg-raised: #ffffff;
  --fg: #1a1917;
  --fg-muted: #6b6862;
  --fg-dim: #9e9b94;
  --border: #e0ddd8;
  --accent: #1a1917;
  --font-serif: 'Libre Baskerville', Georgia, serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--fg);
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ───────────────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 245, 240, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 32px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--fg);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 12px;
  color: var(--fg-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.15s;
}
.nav-link:hover { color: var(--fg); }

/* ── HERO ──────────────────────────────────────────────────────── */
.hero {
  max-width: 780px;
  margin: 0 auto;
  padding: 80px 32px 72px;
}
.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 20px;
  font-weight: 400;
}
.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4.5vw, 46px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
  color: var(--fg);
}
.hero-sub {
  font-size: 15px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 40px;
}

/* ── EMAIL FORM ───────────────────────────────────────────────── */
.subscribe-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  max-width: 520px;
}
.subscribe-input {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 11px 16px;
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  flex: 1;
  min-width: 240px;
  transition: border-color 0.15s;
}
.subscribe-input:focus { border-color: var(--fg); }
.subscribe-input::placeholder { color: var(--fg-dim); }
.subscribe-btn {
  background: var(--fg);
  color: var(--bg);
  border: 1px solid var(--fg);
  border-radius: 4px;
  padding: 11px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.subscribe-btn:hover { opacity: 0.75; }
.form-msg {
  font-size: 12px;
  min-height: 20px;
  margin-top: 12px;
}
.msg-success { color: #2d7a45; }
.msg-error { color: #c0392b; }

/* ── DIVIDER ──────────────────────────────────────────────────── */
.section-divider {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 32px;
}
.section-divider hr {
  border: none;
  border-top: 1px solid var(--border);
}

/* ── VALUE PROPS ─────────────────────────────────────────────── */
.props {
  max-width: 780px;
  margin: 0 auto;
  padding: 56px 32px 48px;
}
.props-header {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 28px;
}
.props-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.prop-card {
  background: var(--bg-raised);
  padding: 28px 24px;
  border-right: 1px solid var(--border);
}
.prop-card:last-child { border-right: none; }
.prop-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--fg);
}
.prop-desc {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ── PRICING ───────────────────────────────────────────────────── */
.pricing {
  max-width: 780px;
  margin: 0 auto;
  padding: 56px 32px 40px;
}
.pricing-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 28px;
  text-align: center;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.pricing-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.pricing-card--featured {
  border-color: var(--fg);
  box-shadow: 0 0 0 1px var(--fg);
}
.pricing-tier {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 12px;
  font-weight: 500;
}
.pricing-price {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 6px;
}
.pricing-period {
  font-size: 16px;
  font-weight: 400;
  color: var(--fg-muted);
}
.pricing-desc {
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 20px;
  line-height: 1.55;
}
.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  flex: 1;
}
.pricing-features li {
  font-size: 12px;
  color: var(--fg-muted);
  padding: 5px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-cta {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--fg);
  border-radius: 4px;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  width: 100%;
  text-align: center;
}
.pricing-cta:hover { background: var(--fg); color: var(--bg); }
.pricing-cta--featured {
  background: var(--fg);
  color: var(--bg);
}
.pricing-cta--featured:hover { background: #333; }
.pricing-footnote {
  text-align: center;
  font-size: 11px;
  color: var(--fg-dim);
  margin-top: 20px;
}

/* ── SOCIAL PROOF ─────────────────────────────────────────────── */
.proof {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 32px 80px;
}
.proof-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 12px;
}
.proof-statement {
  font-family: var(--font-serif);
  font-size: 17px;
  font-style: italic;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 480px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-tagline {
  font-size: 12px;
  color: var(--fg-dim);
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-link {
  font-size: 12px;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-link:hover { color: var(--fg); }

/* ── FOOTER ──────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 32px;
}
.footer-inner {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-logo {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
}
.footer-note {
  font-size: 12px;
  color: var(--fg-dim);
}

/* ── MOBILE ──────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero { padding: 56px 20px 48px; }
  .pricing { padding: 40px 20px 36px; }
  .proof { padding: 0 20px 56px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .props-grid { grid-template-columns: 1fr; }
  .prop-card { border-right: none; border-bottom: 1px solid var(--border); }
  .prop-card:last-child { border-bottom: none; }
  .nav-inner { padding: 0 20px; }
  .footer-inner { flex-direction: column; gap: 14px; }
  .footer-left { flex-direction: column; gap: 6px; }
  .footer-links { gap: 16px; }
  .subscribe-form { flex-direction: column; }
  .subscribe-input { min-width: 0; }
  .subscribe-btn { width: 100%; }
}