/* index.html only */

/* ─── HERO ─── */
.hero {
  max-width: var(--max); margin: 0 auto;
  padding: calc(var(--nav-h) + 4rem) 1.25rem 2rem;
  display: grid; grid-template-columns: 1.25fr 1fr; gap: 3rem; align-items: center;
  position: relative;
}
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 70% at 75% 45%, black 20%, transparent 75%);
  opacity: 0.35;
}
.hero-eyebrow {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-mid);
  letter-spacing: 0.04em; margin-bottom: 1.25rem;
}
.hero-eyebrow strong { color: var(--text); font-weight: 700; }
.hero-title {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(2rem, 3.6vw, 2.75rem); line-height: 1.12; letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}
.hero-title em { font-style: normal; color: var(--accent); }
.hero-title em.alt { color: var(--accent2); }
.hero-bio { color: var(--text-mid); font-size: 1.05rem; max-width: 560px; margin-bottom: 1.5rem; }
.hero-bio a { color: var(--text); text-decoration-color: var(--border-bright); text-underline-offset: 3px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 2rem; }
.hero-tags .chip.lead { color: var(--text); border-color: var(--border-bright); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.hero-viz { position: relative; }
.fig { margin: 0; border: 1px solid var(--ink); border-radius: 2px; background: var(--paper); }
.fig-bar {
  display: flex; justify-content: space-between; gap: 1rem; padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--ink);
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase;
}
.fig-bar span:last-child { color: var(--text-dim); }
.fig svg { width: 100%; height: auto; display: block; padding: 0.5rem; }
.fig svg text { font-family: var(--font-mono); }
.fig-note { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); margin-top: 0.6rem; }
.fig .fig-note { padding: 0 0.75rem 0.75rem; }

/* ─── PROOF STRIP ─── */
/* a ruled "spec table" row: ink rules top and bottom, hairlines between cells */
.proof {
  width: min(calc(100% - 2.5rem), calc(var(--max) - 2.5rem)); margin: 1rem auto 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--rule); border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink);
}
.proof .proof-item { padding: 1.1rem 1.2rem; border: 0; border-radius: 0; background: var(--paper); }
.proof a.proof-item:hover { background: var(--paper-2); }
.proof-kicker {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 0.4rem; display: flex; justify-content: space-between; gap: 0.5rem;
}
.proof-kicker span:last-child { color: var(--accent); }
.proof-fact { font-weight: 600; color: var(--text); line-height: 1.35; font-size: 0.95rem; }
.proof-sub { color: var(--text-dim); font-size: 0.82rem; margin-top: 0.3rem; }

/* ─── TWO PROBLEMS ─── */
.problems { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.problem { padding: 2rem; border-top: 3px solid var(--pc); display: flex; flex-direction: column; gap: 1.1rem; }
.problem-kicker { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--pc); }
.problem h3 { font-family: var(--font-display); font-size: 1.45rem; line-height: 1.2; }
.problem h3 small { display: block; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-dim); font-weight: 400; margin-top: 0.3rem; }
.problem dl { display: grid; gap: 0.9rem; }
.problem dt { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 0.15rem; }
.problem dd { color: var(--text-mid); font-size: 0.95rem; }
.problem dd strong { color: var(--text); font-weight: 600; }
.problem-links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: auto; padding-top: 0.5rem; }
.problem-links a {
  font-family: var(--font-mono); font-size: 0.75rem; text-decoration: none;
  color: var(--text); border: 1px solid var(--border-bright); border-radius: 4px; padding: 0.3rem 0.7rem;
  transition: border-color 0.2s, color 0.2s;
}
.problem-links a:hover { border-color: var(--pc); color: var(--pc); }
.problem-links a.primary { border-color: var(--pc); color: var(--pc); }

/* ─── WRITING ─── */
.writing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.post-card { padding: 1.5rem; display: flex; flex-direction: column; gap: 0.7rem; position: relative; overflow: hidden; }
.post-card.featured { border-top: 3px solid var(--signal); }
.post-card.featured.eff { border-top-color: var(--copper); }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-dim); }
.post-kind { margin-left: auto; }
.post-kind.interactive { color: var(--signal); }
.post-title { font-family: var(--font-display); font-size: 1.12rem; line-height: 1.3; }
.post-summary { color: var(--text-mid); font-size: 0.9rem; }

/* ─── EVIDENCE ─── */
.evidence { display: grid; gap: 1rem; }
.ev-item { padding: 1.4rem 1.6rem; display: grid; grid-template-columns: 1fr auto; gap: 0.4rem 1.5rem; align-items: start; }
.ev-item h3 { font-family: var(--font-display); font-size: 1.1rem; }
.ev-item h3 code { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); font-weight: 400; margin-left: 0.4rem; }
.ev-item p { color: var(--text-mid); font-size: 0.93rem; grid-column: 1; }
.ev-item p b { color: var(--text); font-weight: 600; }
.ev-item .ev-side { grid-row: 1 / span 3; grid-column: 2; display: flex; flex-direction: column; align-items: flex-end; gap: 0.6rem; }
.ev-item .ev-side a { font-family: var(--font-mono); font-size: 0.78rem; white-space: nowrap; }

/* ─── FOUNDATIONS ─── */
.foundations { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.foundations th, .foundations td { text-align: left; padding: 0.85rem 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.foundations th { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim); font-weight: 400; }
.foundations td:first-child { font-weight: 600; color: var(--text); white-space: nowrap; }
.foundations td:nth-child(2) { color: var(--text-dim); font-family: var(--font-mono); font-size: 0.78rem; }
.foundations td:last-child a { display: inline-block; margin: 0 0.9rem 0.25rem 0; text-decoration: none; }
.foundations td:last-child a:hover { text-decoration: underline; }
.foundations .note { color: var(--text-dim); font-size: 0.8rem; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg2); }

/* ─── PROFILES ─── */
.profile-label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 0.9rem; }
.profiles-primary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 2rem; }
.profile { padding: 1.4rem; display: flex; flex-direction: column; gap: 0.6rem; --pc: var(--accent); }
a.profile:hover { border-color: var(--pc); }
.profile-top { display: flex; align-items: center; gap: 0.8rem; }
.profile-badge {
  width: 40px; height: 40px; border-radius: 8px; display: grid; place-items: center; flex-shrink: 0;
  font-family: var(--font-mono); font-weight: 600; font-size: 0.85rem; color: var(--pc);
  background: color-mix(in srgb, var(--pc) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--pc) 35%, transparent);
}
.profile-name { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.profile-handle { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); }
.profile-desc { color: var(--text-mid); font-size: 0.88rem; flex: 1; }
.profile-cta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--pc); }
.profiles-social { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.social {
  display: inline-flex; align-items: center; gap: 0.6rem; padding: 0.6rem 1rem;
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--text); text-decoration: none;
}
.social span { color: var(--text-dim); font-size: 0.75rem; }

/* ─── CONTACT ─── */
.contact { padding: 3rem 2rem; text-align: center; position: relative; overflow: hidden; border-color: var(--ink); }
.contact::before {
  content: ''; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    linear-gradient(90deg, var(--signal) 0 50%, var(--copper) 50% 100%) top / 100% 3px no-repeat;
}
.contact > * { position: relative; }
.contact h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.15; margin: 1rem 0; }
.contact p { color: var(--text-mid); max-width: 620px; margin: 0 auto 1.5rem; }
.contact-badge {
  display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--signal);
  border: 1px solid color-mix(in srgb, var(--signal) 40%, transparent); background: transparent; padding: 0.25rem 0.9rem; border-radius: 999px;
}
.contact-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; margin-bottom: 2rem; }
.contact-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }

/* ─── RESPONSIVE ─── */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: calc(var(--nav-h) + 2.5rem); }
  .hero-viz { max-width: 380px; margin: 0 auto; width: 100%; }
  .proof { grid-template-columns: 1fr 1fr; }
  .problems { grid-template-columns: 1fr; }
  .writing-grid { grid-template-columns: 1fr 1fr; }
  .profiles-primary { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .proof, .writing-grid { grid-template-columns: 1fr; }
  .problem { padding: 1.5rem; }
  .ev-item { grid-template-columns: 1fr; }
  .ev-item .ev-side { grid-row: auto; grid-column: 1; flex-direction: row; flex-wrap: wrap; align-items: center; }
  .foundations td:first-child { white-space: normal; }
}