/* ============================================================
   STRONG AI — shared stylesheet
   Swiss grotesque + mono on warm off-black. A quiet publication.
   No gradients, no glow, no rounded SaaS. Type does the work.
   ============================================================ */

:root {
  --bg:        #0d0d0c;   /* warm off-black, not pure black */
  --bg-raise:  #131311;   /* faint lift for the rare panel */
  --ink:       #e7e4dc;   /* warm light, not pure white */
  --ink-soft:  #b4b0a6;   /* secondary text */
  --ink-mute:  #7c786e;   /* metadata, marginalia */
  --ink-faint: #4a4740;   /* hairline-adjacent labels */
  --rule:      rgba(231,228,220,0.13);  /* hairlines */
  --rule-soft: rgba(231,228,220,0.07);
  --accent:    #b8915a;   /* one restrained ink — faded amber. used sparingly */

  --grotesque: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "SFMono-Regular", ui-monospace, "Roboto Mono", Menlo, Consolas, monospace;

  --measure: 64ch;
  --gutter: clamp(1.5rem, 5vw, 6rem);
  --maxw: 1200px;
}

* { box-sizing: border-box; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--grotesque);
  font-size: 18px;
  line-height: 1.7;
  font-weight: 400;
  letter-spacing: 0.005em;
  -webkit-text-size-adjust: 100%;
}

::selection { background: rgba(184,145,90,0.22); color: var(--ink); }

/* ---------- links ---------- */
a { color: inherit; text-decoration: none; }
a.u {
  border-bottom: 1px solid var(--rule);
  transition: border-color .25s ease, color .25s ease;
  padding-bottom: 1px;
}
a.u:hover { border-color: var(--accent); color: var(--ink); }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.measure { max-width: var(--measure); }

.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.rule-soft { border: 0; border-top: 1px solid var(--rule-soft); margin: 0; }

/* ---------- mono labels / metadata ---------- */
.label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 400;
}
.label--accent { color: var(--accent); }
.num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
}

/* ============================================================
   MASTHEAD / NAV
   ============================================================ */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13,13,12,0.82);
  backdrop-filter: saturate(120%) blur(8px);
  -webkit-backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.masthead__row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.brand {
  font-family: var(--grotesque);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  display: inline-flex; align-items: baseline; gap: 0.6rem;
}
.brand .dot { color: var(--accent); }
.brand small {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.nav { display: flex; gap: clamp(1rem, 2.5vw, 2.4rem); align-items: baseline; }
.nav a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  transition: color .2s ease;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"]::before { content: "— "; color: var(--accent); }

@media (max-width: 640px) {
  .masthead__row { flex-direction: column; gap: 0.6rem; align-items: flex-start; }
  .nav { flex-wrap: wrap; gap: 0.9rem 1.3rem; }
}

/* ============================================================
   HERO / SECTIONS
   ============================================================ */
.hero { padding: clamp(4rem, 13vh, 9rem) 0 clamp(3rem, 9vh, 6rem); }
.hero__kicker { margin-bottom: 2.2rem; }
.display {
  font-weight: 600;
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 18ch;
  text-wrap: balance;
}
.display em { font-style: italic; color: var(--ink); }
.display .soft { color: var(--ink-mute); }

.lead {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.62;
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 2.2rem 0 0;
  font-weight: 400;
}

section { padding: clamp(3.5rem, 9vh, 7rem) 0; }
.section-head {
  display: flex; align-items: baseline; gap: 1.2rem;
  margin-bottom: 2.8rem;
}
.section-head .num { white-space: nowrap; }
h2.section-title {
  font-weight: 600;
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  letter-spacing: -0.015em;
  line-height: 1.12;
  margin: 0;
}
h3 {
  font-weight: 600;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.6rem;
}

p { margin: 0 0 1.3rem; }
p.body { color: var(--ink-soft); }
strong { font-weight: 600; color: var(--ink); }
em { font-style: italic; }

.dl { color: var(--ink-soft); }
.dl b { color: var(--ink); font-weight: 600; }

/* ============================================================
   THESIS BLOCK (the quiet argument)
   ============================================================ */
.thesis {
  font-weight: 500;
  font-size: clamp(1.4rem, 3.4vw, 2.3rem);
  line-height: 1.32;
  letter-spacing: -0.015em;
  max-width: 28ch;
  margin: 0;
}
.thesis .soft { color: var(--ink-mute); }
.thesis .accent { color: var(--accent); }

/* contrast pair (most products / this direction) */
.contrast {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-top: 1px solid var(--rule);
}
.contrast > div { padding: 2.2rem 0; }
.contrast > div + div { border-left: 1px solid var(--rule); padding-left: 2.4rem; }
.contrast ul { list-style: none; margin: 1.2rem 0 0; padding: 0; }
.contrast li {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em;
  color: var(--ink-soft); padding: 0.45rem 0; border-bottom: 1px solid var(--rule-soft);
}
@media (max-width: 720px) {
  .contrast { grid-template-columns: 1fr; }
  .contrast > div + div { border-left: 0; border-top: 1px solid var(--rule); padding-left: 0; }
}

/* ============================================================
   PILLARS (propositions, not feature cards)
   ============================================================ */
.pillars { display: grid; gap: 0; }
.pillar {
  display: grid;
  grid-template-columns: minmax(0, 7rem) 1fr;
  gap: clamp(1rem, 4vw, 3rem);
  padding: 2.6rem 0;
  border-top: 1px solid var(--rule);
  align-items: start;
}
.pillar:last-child { border-bottom: 1px solid var(--rule); }
.pillar__index { padding-top: 0.35rem; }
.pillar__body { max-width: 58ch; }
.pillar h3 { font-size: clamp(1.25rem, 2.6vw, 1.6rem); margin-bottom: 0.8rem; }
.pillar p { margin-bottom: 0; color: var(--ink-soft); }
@media (max-width: 640px) {
  .pillar { grid-template-columns: 1fr; gap: 0.7rem; padding: 2rem 0; }
}

/* ============================================================
   INDEX LISTS (writing, events)
   ============================================================ */
.index { border-top: 1px solid var(--rule); }
.entry {
  display: grid;
  grid-template-columns: 5rem 1fr minmax(0, 12rem);
  gap: clamp(1rem, 3vw, 2.5rem);
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
  transition: background .2s ease;
}
.entry:hover { background: var(--bg-raise); }
.entry__title { font-weight: 600; font-size: clamp(1.15rem, 2.4vw, 1.45rem); letter-spacing: -0.01em; }
.entry__title .dek { display: block; font-weight: 400; font-size: 0.95rem; color: var(--ink-mute); margin-top: 0.35rem; letter-spacing: 0; }
.entry__meta { font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--ink-mute); text-align: right; }
.entry__meta .tag { display: inline-block; }
@media (max-width: 720px) {
  .entry { grid-template-columns: 1fr; gap: 0.5rem; }
  .entry__meta { text-align: left; }
}

/* upcoming/placeholder entries read quieter */
.entry--ghost { opacity: 0.55; }
.entry--ghost:hover { background: transparent; }

/* ============================================================
   ARTICLE (essay reading view)
   ============================================================ */
.article { padding: clamp(3rem, 8vh, 6rem) 0; }
.article__head { max-width: var(--measure); margin-bottom: 3.2rem; }
.article__meta { display: flex; gap: 1.4rem; flex-wrap: wrap; margin-bottom: 2rem; }
.article h1 {
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}
.article__standfirst {
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  color: var(--ink-soft);
  line-height: 1.55;
  margin-top: 1.6rem;
  max-width: 56ch;
}
.prose { max-width: var(--measure); }
.prose p { color: var(--ink-soft); margin-bottom: 1.5rem; }
.prose p:first-of-type { color: var(--ink); }
.prose h2 {
  font-weight: 600; font-size: 1.5rem; letter-spacing: -0.015em;
  margin: 3.2rem 0 1.1rem; color: var(--ink);
}
.prose blockquote {
  margin: 2.4rem 0; padding: 0 0 0 1.6rem;
  border-left: 1px solid var(--accent);
  font-size: 1.3rem; line-height: 1.45; font-weight: 500;
  color: var(--ink); letter-spacing: -0.01em;
}
.prose blockquote p { color: var(--ink); }
.prose em { color: var(--ink); }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0; }
.dropcap::first-letter {
  /* deliberately omitted — Swiss restraint. kept as hook if wanted later */
}

/* ============================================================
   CTA / CONTACT
   ============================================================ */
.cta { padding: clamp(4rem, 11vh, 8rem) 0; }
.cta__big {
  font-weight: 600; font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: -0.02em; line-height: 1.15; max-width: 22ch; margin: 0 0 2rem;
}
.maillink {
  font-family: var(--mono); font-size: clamp(1rem, 2.4vw, 1.5rem);
  letter-spacing: 0.02em; color: var(--ink);
  border-bottom: 1px solid var(--rule); padding-bottom: 3px;
  transition: border-color .25s ease;
}
.maillink:hover { border-color: var(--accent); }

/* button-ish quiet link */
.qbtn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-soft);
  border: 1px solid var(--rule); padding: 0.75rem 1.1rem;
  transition: border-color .2s ease, color .2s ease;
}
.qbtn:hover { border-color: var(--accent); color: var(--ink); }
.qbtn .arr { color: var(--accent); }

/* ============================================================
   FOOTER
   ============================================================ */
.foot { border-top: 1px solid var(--rule); padding: 3rem 0 4rem; margin-top: 2rem; }
.foot__row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem; align-items: baseline; }
.foot__nav { display: flex; gap: 1.6rem; flex-wrap: wrap; }
.foot__nav a { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute); }
.foot__nav a:hover { color: var(--ink); }
.foot__fine { font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--ink-faint); }

/* ---------- helpers ---------- */
.stack > * + * { margin-top: 1.3rem; }
.mt-s { margin-top: 1rem; } .mt-m { margin-top: 2rem; } .mt-l { margin-top: 3.5rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 5rem); }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }
.spacer { height: clamp(2rem, 8vh, 6rem); }

@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(12px); animation: rise .8s cubic-bezier(.2,.7,.2,1) forwards; }
  @keyframes rise { to { opacity: 1; transform: none; } }
}