:root {
  --bg: #0A0A0A;
  --fg: #FFFFFF;
  --orange: #F25E1E;
  --muted: #C9C9C9;
  --dim: #6E6E6E;
  --line: #2A2A2A;
  --font-display: 'Bebas Neue', 'Impact', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; }

/* ---------- nav ---------- */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px clamp(20px, 4vw, 36px);
  border-bottom: 0.5px solid var(--line);
}

.brand {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--fg);
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand .mm {
  background-image: repeating-linear-gradient(0deg, var(--orange) 0 3px, var(--fg) 3px 4px);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-weight: 500;
}

.nav-cta {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--orange);
  text-decoration: none;
  letter-spacing: 0.04em;
  padding: 6px 2px;
  border-bottom: 0.5px solid transparent;
  transition: border-color 0.15s ease;
}

.nav-cta:hover { border-bottom-color: var(--orange); }

/* ---------- hero ---------- */
.hero {
  flex: 1;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 80px) clamp(20px, 5vw, 48px);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  letter-spacing: 0.18em;
  margin-bottom: 24px;
  text-transform: uppercase;
}

.title {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 0.88;
  margin: 0;
}

.t-i {
  display: block;
  font-size: clamp(40px, 8vw, 72px);
  color: var(--fg);
  letter-spacing: 0.005em;
}

.t-married {
  display: block;
  font-size: clamp(58px, 13vw, 124px);
  color: var(--orange);
  margin-top: 4px;
  letter-spacing: -0.005em;
}

.t-murderer {
  display: block;
  font-size: clamp(58px, 13vw, 124px);
  letter-spacing: -0.005em;
  background-image: repeating-linear-gradient(
    0deg,
    var(--orange) 0 12px,
    var(--fg) 12px 18px
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.tag {
  font-family: var(--font-display);
  font-size: clamp(26px, 5vw, 46px);
  color: var(--fg);
  margin: 18px 0 32px;
  letter-spacing: 0.01em;
  line-height: 1;
}

.lede {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.65;
  color: var(--muted);
  max-width: 580px;
  margin-bottom: 32px;
}

.ctas {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.cta {
  display: inline-block;
  background: var(--orange);
  color: var(--bg);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  padding: 13px 24px;
  border-radius: 8px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease;
}

.cta:hover { transform: translateY(-1px); background: #FF6F32; }
.cta:active { transform: translateY(0); }

.byline {
  margin-top: 36px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.08em;
}

/* ---------- footer ---------- */
.footer {
  padding: 24px clamp(20px, 4vw, 36px);
  border-top: 0.5px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.04em;
}

.footer a { color: var(--orange); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ---------- mobile stripe scaling ---------- */
@media (max-width: 600px) {
  .t-murderer {
    background-image: repeating-linear-gradient(
      0deg,
      var(--orange) 0 7px,
      var(--fg) 7px 11px
    );
  }
}

@media (prefers-reduced-motion: reduce) {
  .cta { transition: none; }
}

/* ---------- nav right cluster (with Research link) ---------- */
.nav-right { display: flex; align-items: center; gap: clamp(14px, 3vw, 28px); }
.nav-link {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  padding: 6px 2px;
  border-bottom: 0.5px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav-link:hover { color: var(--fg); }
.nav-link.active { color: var(--orange); border-bottom-color: var(--orange); }

/* ---------- research page ---------- */
.page {
  flex: 1;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(32px, 5vw, 64px) clamp(20px, 5vw, 48px);
}

.page-hero {
  padding-bottom: 28px;
  border-bottom: 0.5px solid var(--line);
  margin-bottom: 12px;
}

.page-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  letter-spacing: 0.18em;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.page-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(56px, 11vw, 110px);
  line-height: 0.9;
  color: var(--orange);
  letter-spacing: -0.005em;
  margin: 0 0 18px;
}

.page-lede {
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.65;
  color: var(--muted);
  max-width: 620px;
  margin-bottom: 20px;
}

/* chip legend */
.legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  padding: 14px 0 0;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.04em;
}

/* section */
.section {
  padding: 44px 0 8px;
}
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--orange);
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 4.5vw, 48px);
  line-height: 1;
  color: var(--fg);
  letter-spacing: 0.005em;
  margin: 0 0 24px;
}

/* study card */
.card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 22px;
  padding: 20px 0;
  border-top: 0.5px solid var(--line);
  align-items: start;
}
.section .card:last-of-type { border-bottom: 0.5px solid var(--line); }

.chip {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 5px 8px;
  border-radius: 3px;
  text-align: center;
  display: inline-block;
  white-space: nowrap;
  line-height: 1.2;
  align-self: start;
}
.chip.robust {
  background: var(--orange);
  color: var(--bg);
  border: 0.5px solid var(--orange);
}
.chip.limited {
  background: transparent;
  color: var(--muted);
  border: 0.5px solid var(--dim);
}
.chip.speculation {
  background: transparent;
  color: var(--dim);
  border: 0.5px dashed var(--dim);
}
.chip.none {
  background: transparent;
  color: var(--dim);
  border: 0.5px solid transparent;
  font-style: italic;
}

.card-body p.claim {
  font-size: 15px;
  line-height: 1.6;
  color: #E5E5E5;
  margin: 0 0 10px;
}
.card-body p.source {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--dim);
  margin: 0;
  line-height: 1.6;
}
.card-body p.source a {
  color: var(--orange);
  text-decoration: none;
}
.card-body p.source a:hover { text-decoration: underline; }

/* reading list */
.readinglist {
  list-style: none;
  padding: 0;
  margin: 0;
}
.readinglist li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  padding: 20px 0;
  border-top: 0.5px solid var(--line);
  align-items: start;
}
.readinglist li:last-child { border-bottom: 0.5px solid var(--line); }
.readinglist .num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  letter-spacing: 0.06em;
  padding-top: 2px;
}
.readinglist .title {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--fg);
  line-height: 1.4;
}
.readinglist .title em {
  font-style: italic;
  color: var(--fg);
}
.readinglist .source-link {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
  text-decoration: none;
  letter-spacing: 0.04em;
}
.readinglist .source-link:hover { text-decoration: underline; }

/* mobile: stack chip above claim */
@media (max-width: 640px) {
  .card { grid-template-columns: 1fr; gap: 10px; }
  .readinglist li { grid-template-columns: 1fr; gap: 8px; }
  .readinglist .num { padding-top: 0; }
}