/* ============================================================================
   Cantera+ · Nocturne stylesheet
   Broadsheet-editorial dark. Trophy gold accent. Fraunces / Inter / JetBrains Mono.
   Matches the app's Nocturne design system.
   ============================================================================ */

:root {
  --bg: #0C0F0D;
  --surface: #151A17;
  --elevated: #1D2320;
  --border: #252C27;
  --border-strong: #34413A;
  --ink: #F0EDE4;
  --quiet: #A5AAA6;
  --mute: #7C837F;
  --gold: #D4A94D;
  --gold-dim: #9E7F3A;
  --gold-bg: rgba(212, 169, 77, 0.10);
  --gold-bg-soft: rgba(212, 169, 77, 0.04);
  --pitch: #7BB86F;
  --absent: #C15A4E;

  --serif: 'Fraunces', ui-serif, Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --wrap: 1120px;
  --gutter: clamp(20px, 4vw, 40px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--gold); }
::selection { background: var(--gold); color: var(--bg); }

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 8px 12px;
  background: var(--gold);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 12px;
}
.skip:focus { left: 12px; top: 12px; z-index: 100; }

/* ============ Wordmark ============ */
.wordmark {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  font-size: 20px;
  line-height: 1;
}
.wordmark .plus {
  color: var(--gold);
  font-weight: 400;
  margin-left: 0;
}
.wordmark-lg { font-size: 24px; }

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(12, 15, 13, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}
.header-row {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.brand-link { flex-shrink: 0; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.site-nav a { color: var(--quiet); transition: color 0.15s; }
.site-nav a:hover { color: var(--ink); }
.site-nav a.ghost { color: var(--ink); }
.site-nav a.cta {
  color: var(--bg);
  background: var(--gold);
  padding: 9px 14px;
  border-radius: 2px;
  font-weight: 700;
  transition: background 0.15s;
}
.site-nav a.cta:hover { background: var(--ink); color: var(--bg); }

/* Language switcher */
.langs {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--mute);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.langs a {
  color: var(--mute);
  transition: color 0.15s;
}
.langs a:hover, .langs a[aria-current="true"] { color: var(--gold); }
.langs svg { flex-shrink: 0; }

@media (max-width: 720px) {
  .site-nav { gap: 14px; }
  .site-nav a:not(.cta):not(.ghost) { display: none; }
  .langs { display: none; }
}

/* ============ Section rhythm ============ */
section { padding-block: clamp(60px, 9vw, 110px); }
.sec-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.sec-eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--gold);
}

.editorial {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  text-wrap: balance;
  color: var(--ink);
}

/* ============ Hero ============ */
.hero { padding-block: clamp(70px, 10vw, 120px); }
.hero .eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 7vw, 82px);
  letter-spacing: -0.04em;
  line-height: 1.02;
  color: var(--ink);
  max-width: 15ch;
  text-wrap: balance;
  margin-bottom: 24px;
}
.hero .sub {
  font-family: var(--serif);
  font-size: clamp(17px, 1.6vw, 21px);
  color: var(--quiet);
  line-height: 1.5;
  max-width: 60ch;
  margin-bottom: 36px;
  font-weight: 400;
}
.hero-ctas {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}
.cta {
  display: inline-block;
  background: var(--gold);
  color: var(--bg);
  padding: 14px 22px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background 0.15s;
}
.cta:hover { background: var(--ink); color: var(--bg); }
.cta-lg { padding: 16px 26px; font-size: 13px; }
.ghost {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--quiet);
  transition: color 0.15s;
}
.ghost:hover { color: var(--gold); }
.footnote {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  margin-top: 20px;
  letter-spacing: 0.08em;
}

/* ============ Problem ============ */
.problem {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.problem h2 {
  font-size: clamp(28px, 4vw, 46px);
  margin-bottom: 24px;
  max-width: 20ch;
}
.problem .lede {
  font-family: var(--serif);
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--quiet);
  line-height: 1.6;
  max-width: 60ch;
  font-weight: 400;
}

/* ============ Value props ============ */
.props .prop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 12px;
}
@media (max-width: 900px) { .props .prop-grid { grid-template-columns: 1fr; } }
.prop {
  padding: 32px 28px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.prop-idx {
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  color: var(--gold);
  font-weight: 400;
}
.prop h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
}
.prop p {
  font-family: var(--sans);
  color: var(--quiet);
  font-size: 15px;
  line-height: 1.6;
}

/* ============ Features list ============ */
.features h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  margin-bottom: 32px;
  max-width: 22ch;
}
.feature-list {
  columns: 2;
  column-gap: 40px;
  list-style: none;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(16px, 1.4vw, 18px);
  color: var(--quiet);
  line-height: 1.5;
}
.feature-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  break-inside: avoid;
  page-break-inside: avoid;
  padding-left: 20px;
  position: relative;
}
.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 1px;
  background: var(--gold);
}
@media (max-width: 720px) { .feature-list { columns: 1; } }

/* ============ Pricing ============ */
.pricing {
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.pricing h2 {
  font-size: clamp(28px, 4vw, 44px);
  margin-bottom: 40px;
  max-width: 22ch;
}
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
@media (max-width: 900px) { .tier-grid { grid-template-columns: 1fr; } }
.tier {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.tier-hi {
  border-color: var(--gold);
  background: var(--gold-bg-soft);
}
.tier-name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}
.tier-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.tier-num {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.tier-cadence {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--mute);
}
.tier-cap {
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--quiet);
}
.tier-features {
  list-style: none;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tier-features li {
  font-size: 14px;
  color: var(--quiet);
  padding-left: 16px;
  position: relative;
}
.tier-features li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--gold);
  font-weight: 700;
}
.tier-cta {
  margin-top: auto;
  background: var(--gold);
  color: var(--bg);
  padding: 12px;
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background 0.15s;
}
.tier-cta:hover { background: var(--ink); }
.tier-hi .tier-cta:hover { background: var(--ink); color: var(--bg); }
.pricing-foot {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 0.06em;
  text-align: center;
}

/* ============ FAQ ============ */
.faq h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  margin-bottom: 32px;
  max-width: 22ch;
}
.faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}
.faq-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
}
@media (max-width: 720px) {
  .faq-item { grid-template-columns: 1fr; gap: 10px; }
}
.faq-item dt {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.015em;
  color: var(--ink);
  line-height: 1.3;
}
.faq-item dd {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--quiet);
  line-height: 1.55;
}

/* ============ Final CTA ============ */
.final-cta {
  border-top: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
}
.final-cta h2 {
  font-size: clamp(30px, 4.5vw, 52px);
  margin-bottom: 20px;
  max-width: 18ch;
  margin-inline: auto;
}
.final-cta .sub {
  font-family: var(--serif);
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--quiet);
  max-width: 50ch;
  margin: 0 auto 32px;
  line-height: 1.5;
}

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--border);
  background: #050706;
  padding-block: 56px 32px;
}
.foot-row {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  margin-bottom: 40px;
}
@media (max-width: 720px) { .foot-row { grid-template-columns: 1fr; } }
.foot-brand .wordmark { font-size: 22px; }
.foot-tag {
  font-family: var(--serif);
  font-style: italic;
  color: var(--quiet);
  font-size: 14px;
  margin-top: 12px;
  max-width: 30ch;
  line-height: 1.4;
}
.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 500px) { .foot-cols { grid-template-columns: 1fr; } }
.foot-col h4 {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--mute);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 500;
}
.foot-col ul { list-style: none; }
.foot-col li { padding: 4px 0; }
.foot-col a {
  font-size: 14px;
  color: var(--quiet);
  transition: color 0.15s;
}
.foot-col a:hover { color: var(--gold); }
.foot-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 0.08em;
  gap: 20px;
  flex-wrap: wrap;
}
.foot-bottom .langs { display: flex; }