:root {
  --bg: #fafaf7;
  --bg-elev: #ffffff;
  --ink: #0b0c0e;
  --ink-2: #1f2125;
  --muted: #5b6166;
  --muted-2: #7c8189;
  --line: #e6e5e0;
  --line-strong: #d8d7d1;
  --cobalt: #1d4ed8;
  --cobalt-ink: #1e40af;
  --teal: #0d9488;
  --teal-soft: #99f6e4;
  --amber: #b45309;
  --max: 1180px;
  --pad: clamp(16px, 3vw, 28px);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  margin: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(29, 78, 216, 0.18); color: var(--ink); }

a {
  color: var(--cobalt);
  text-decoration: none;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover { color: var(--cobalt-ink); text-decoration: underline; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 2px;
  border-radius: 4px;
}

h1, h2, h3, p, ul, ol, dl, dd, dt, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  background: var(--ink);
  color: #fff;
  padding: 8px 12px;
  border-radius: 4px;
  transform: translateY(-200%);
  z-index: 50;
  font-weight: 600;
}
.skip-link:focus { transform: translateY(0); color: #fff; text-decoration: none; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.005em;
  min-width: 0;
}
.brand:hover { color: var(--ink); text-decoration: none; }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: var(--ink);
  color: #fff;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: -0.04em;
}
.brand-sep { color: var(--line-strong); margin: 0 2px; }
.brand-role {
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-links {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-family: var(--mono);
  font-size: 12.5px;
}
.nav-links a {
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 6px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--ink); background: rgba(11, 12, 14, 0.04); text-decoration: none; }
.nav-links a.is-active { color: var(--ink); background: rgba(11, 12, 14, 0.06); }
.nav-cta {
  margin-left: 6px;
  color: var(--ink) !important;
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
}
.nav-cta:hover { background: var(--ink) !important; color: #fff !important; border-color: var(--ink); }

/* ---------- Layout ---------- */
main { display: block; }
.hero, .band, .timeline-section, .stack, .contact {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) var(--pad);
}

.kicker {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-block;
  margin-bottom: 10px;
}

h1, h2 {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--ink);
  line-height: 1.08;
}
h1 {
  font-size: clamp(28px, 4.6vw, 46px);
  margin-bottom: 18px;
  max-width: 22ch;
}
h1 em {
  font-style: normal;
  background: linear-gradient(180deg, transparent 62%, var(--teal-soft) 62%, var(--teal-soft) 92%, transparent 92%);
  padding: 0 2px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  margin-bottom: 8px;
}
h3 {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink);
  margin-bottom: 6px;
}
.sub {
  color: var(--muted);
  font-size: 14.5px;
  max-width: 64ch;
}

/* ---------- Hero ---------- */
.hero { padding-top: clamp(34px, 6vw, 64px); padding-bottom: clamp(40px, 6vw, 72px); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.95fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-2);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.status-loc { color: var(--muted); }
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.18);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(13, 148, 136, 0.05); }
}
.lede {
  color: var(--ink-2);
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.6;
  max-width: 60ch;
  margin-bottom: 22px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  font-size: 13.5px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
  cursor: pointer;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #000; color: #fff; text-decoration: none; }
.btn-quiet { background: var(--bg-elev); color: var(--ink); border-color: var(--line-strong); }
.btn-quiet:hover { background: #fff; border-color: var(--ink); color: var(--ink); text-decoration: none; }
.btn-link { background: transparent; color: var(--cobalt); padding-inline: 6px; }
.btn-link:hover { color: var(--cobalt-ink); text-decoration: underline; }

.proof {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.proof > div {
  padding: 14px 16px 14px 0;
  border-right: 1px solid var(--line);
  min-width: 0;
}
.proof > div:last-child { border-right: 0; padding-right: 0; }
.proof > div + div { padding-left: 16px; }
.proof dt {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
}
.proof .unit {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0;
}
.proof dd {
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 6px;
  line-height: 1.4;
}

/* Builder log */
.hero-right {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  position: relative;
}
.log-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}
.log-title {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.log-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.log { display: flex; flex-direction: column; }
.log li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
  align-items: start;
}
.log li:last-child { border-bottom: 0; padding-bottom: 4px; }
.log time,
.log-key {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  padding-top: 1px;
}
.log p {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.5;
}
.log strong { color: var(--ink); font-weight: 600; }
.log a {
  display: inline-block;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--cobalt);
}

/* ---------- Now band ---------- */
.band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}
.band-inner, .band > .chips {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}
.band-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(20px, 4vw, 56px);
  align-items: start;
}
.band-head { max-width: 36ch; }
.band-body p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}
.band-body p + p { margin-top: 12px; }

.chips {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}
.chips li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px 14px 0;
  border-right: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink);
  font-weight: 500;
  min-width: 0;
}
.chips li:last-child { border-right: 0; }
.chips li + li { padding-left: 18px; }
.chip-i {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--teal);
  letter-spacing: 0.04em;
  background: rgba(13, 148, 136, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ---------- Builder timeline ---------- */
.timeline-section .band-head {
  margin-bottom: 28px;
  max-width: 760px;
}
.timeline-wrap {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}
.timeline-note {
  position: sticky;
  top: 72px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}
.note-label {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.timeline-note p:not(.note-label) {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}
.timeline-note dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--line);
}
.timeline-note dl div {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.timeline-note dt {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}
.timeline-note dd {
  color: var(--muted);
  font-size: 12.5px;
}
.timeline {
  position: relative;
  display: grid;
  gap: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 116px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line-strong);
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 40px;
  padding: 0 0 20px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 111px;
  top: 15px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--teal);
  box-shadow: 0 0 0 5px var(--bg);
  z-index: 1;
}
.timeline-item:last-child { padding-bottom: 0; }
.time-meta {
  padding-top: 7px;
  font-family: var(--mono);
  text-align: right;
}
.time-meta time {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
}
.time-meta span {
  display: block;
  margin-top: 3px;
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.timeline-item article {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  transition: border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}
.timeline-item article:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(11, 12, 14, 0.05);
}
.item-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 8px;
}
.item-head h3 {
  font-size: 16px;
  line-height: 1.25;
  margin-bottom: 0;
}
.evidence {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--teal);
  background: rgba(13, 148, 136, 0.08);
  border: 1px solid rgba(13, 148, 136, 0.22);
  border-radius: 999px;
  padding: 3px 8px;
  white-space: nowrap;
}
.timeline-item p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.58;
}
.item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 12px;
}
.item-tags li {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
  background: rgba(11, 12, 14, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}
.item-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted-2);
}
.item-links a {
  color: var(--cobalt);
}

/* ---------- Stack ---------- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: 22px;
}
.stack-col {
  padding: 20px 20px 20px 0;
  border-right: 1px solid var(--line);
}
.stack-col + .stack-col { padding-left: 20px; }
.stack-col:last-child { border-right: 0; padding-right: 0; }
.stack-col p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
  margin-bottom: 12px;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.tags li {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ---------- Contact ---------- */
.contact .band-head { margin-bottom: 22px; }
.links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}
.links li { border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); }
.links li:nth-child(3n) { border-right: 0; }
.links a {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 14px 16px 14px 0;
  color: var(--ink);
}
.links li:nth-child(3n+1) a { padding-left: 0; }
.links li:not(:nth-child(3n+1)) a { padding-left: 16px; }
.links a:hover { background: rgba(11, 12, 14, 0.03); text-decoration: none; }
.l-k {
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.l-v {
  font-size: 14px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.l-v em { font-style: normal; color: var(--muted-2); margin-left: 2px; }

/* ---------- Footer ---------- */
.foot {
  border-top: 1px solid var(--line);
  margin-top: 24px;
}
.foot-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--pad) 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
  color: var(--muted);
  font-size: 12.5px;
  font-family: var(--mono);
}
.foot-sep { color: var(--line-strong); }
.foot-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  color: var(--ink-2);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .band-inner { grid-template-columns: 1fr; }
  .timeline-wrap { grid-template-columns: 1fr; }
  .timeline-note {
    position: static;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(220px, 0.8fr);
    gap: 18px;
    align-items: start;
  }
  .timeline-note dl { margin-top: 0; }
  .chips { grid-template-columns: repeat(2, 1fr); }
  .chips li:nth-child(2n) { border-right: 0; }
  .chips li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-col:nth-child(2n) { border-right: 0; }
  .stack-col:nth-child(n+3) { border-top: 1px solid var(--line); }
  .links { grid-template-columns: repeat(2, 1fr); }
  .links li:nth-child(3n) { border-right: 1px solid var(--line); }
  .links li:nth-child(2n) { border-right: 0; }
  .links li:nth-child(3n+1) a, .links li:not(:nth-child(3n+1)) a { padding-left: 0; }
  .links li:nth-child(2n) a { padding-left: 16px; }

  .timeline::before { left: 110px; }
  .timeline-item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 36px;
  }
  .timeline-item::before { left: 105px; }
}

@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .nav-inner { padding: 9px 16px; }
  .brand-sep, .brand-role { display: none; }
  .nav-links { gap: 0; }
  .nav-links a { padding: 6px 7px; font-size: 12px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-links a[href="#timeline"] { display: inline-flex; }
  .nav-links a[href="#contact"] { display: inline-flex; }

  .hero { padding-top: 26px; }
  h1 { font-size: clamp(26px, 7vw, 34px); }
  .lede { font-size: 15px; }

  .proof { grid-template-columns: repeat(2, 1fr); }
  .proof > div { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 12px 12px 12px 0; }
  .proof > div + div { padding-left: 12px; }
  .proof > div:nth-child(2n) { border-right: 0; padding-right: 0; }
  .proof > div:nth-child(2n+1) { padding-left: 0; }
  .proof > div:nth-last-child(-n+2) { border-bottom: 0; }

  .chips { grid-template-columns: 1fr; }
  .chips li { border-right: 0; padding-right: 0; padding-left: 0 !important; }
  .chips li + li { border-top: 1px solid var(--line); }

  .timeline-note { display: block; padding: 16px; }
  .timeline-note dl {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .timeline-note dl div {
    display: block;
    padding: 10px 8px 0 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .timeline-note dl div:last-child { border-right: 0; padding-right: 0; padding-left: 8px; }
  .timeline-note dl div + div { padding-left: 8px; }
  .timeline-note dt { font-size: 17px; }
  .timeline-note dd { margin-top: 3px; line-height: 1.25; }
  .timeline::before { left: 4px; }
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-left: 22px;
  }
  .timeline-item::before {
    left: 0;
    top: 8px;
    width: 9px;
    height: 9px;
    box-shadow: 0 0 0 4px var(--bg);
  }
  .time-meta {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding-top: 0;
    text-align: left;
  }
  .time-meta span { margin-top: 0; }
  .timeline-item article { padding: 14px; }
  .item-head {
    display: grid;
    gap: 8px;
  }
  .evidence { justify-self: start; }

  .stack-grid { grid-template-columns: 1fr; }
  .stack-col { border-right: 0; padding: 16px 0; }
  .stack-col + .stack-col { padding-left: 0; border-top: 1px solid var(--line); }

  .links { grid-template-columns: 1fr; }
  .links li { border-right: 0 !important; }
  .links li a, .links li:nth-child(2n) a { padding-left: 0 !important; }
  .links a { grid-template-columns: 96px 1fr; }

  .foot-inner { font-size: 11.5px; }
  .foot-status { margin-left: 0; flex-basis: 100%; }
}