/* ============================================================
   Mark Williams-Cook — design system
   Dark "terminal / search" aesthetic. Mono accents, sharp type.
   ============================================================ */

@font-face { font-display: swap; }

:root {
  /* Palette — deep ink with an electric signal-green accent */
  --bg:        #0a0c10;
  --bg-2:      #0f131a;
  --surface:   #141922;
  --surface-2: #1b212c;
  --border:    #232b38;
  --border-2:  #2e3848;
  --text:      #e8edf4;
  --text-dim:  #9aa7b8;
  --text-mute: #687588;
  --accent:    #4ade80;   /* signal green */
  --accent-2:  #38bdf8;   /* sky */
  --accent-dim:#1f3a2c;
  --danger:    #f87171;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --maxw: 1120px;
  --radius: 14px;
  --radius-sm: 9px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 8px 30px rgba(0,0,0,.45);
  --shadow-lg: 0 24px 60px rgba(0,0,0,.55);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t: 200ms var(--ease-out);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Ambient grid + glow background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 78% -8%, rgba(56,189,248,.10), transparent 60%),
    radial-gradient(800px 600px at 10% 8%, rgba(74,222,128,.08), transparent 55%);
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

a { color: var(--text); text-decoration: none; transition: color var(--t); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t), background var(--t);
}
.site-header.scrolled { border-bottom-color: var(--border); background: color-mix(in oklab, var(--bg) 90%, transparent); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 18px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: -.01em; font-size: 15px; }
.brand .logo { width: 30px; height: 30px; flex: none; }
.brand .logo .blink { animation: blink 1.2s steps(1) infinite; transform-origin: center; }
@keyframes blink { 50% { opacity: .15; } }
.brand b { color: var(--text); }
.brand span { color: var(--accent); }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links > * { position: relative; }
.nav-item > a, .nav-item > button {
  font: inherit; background: none; border: 0; cursor: pointer; color: var(--text-dim);
  font-size: 14px; font-weight: 500; padding: 9px 13px; border-radius: 9px; display: inline-flex; align-items: center; gap: 6px;
  transition: color var(--t), background var(--t);
}
.nav-item > a:hover, .nav-item > button:hover { color: var(--text); background: var(--surface); }
.nav-item > a.active { color: var(--accent); }
.nav-item .chev { width: 12px; height: 12px; opacity: .6; transition: transform var(--t); }
.nav-item:hover .chev, .nav-item:focus-within .chev { transform: rotate(180deg); }

/* Dropdowns */
.dropdown {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 210px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md); padding: 6px;
  opacity: 0; visibility: hidden; transform: translateY(6px) scale(.98); transform-origin: top left;
  transition: opacity var(--t), transform var(--t), visibility var(--t);
}
.nav-item:hover .dropdown, .nav-item:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.dropdown a { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 8px 11px; border-radius: 7px; font-size: 14px; color: var(--text-dim); transition: color var(--t), background var(--t); }
.dropdown a:hover { color: var(--text); background: var(--surface-2); }
.dropdown a .ext { opacity: 0; transform: translateX(-4px); transition: all var(--t); color: var(--accent); }
.dropdown a:hover .ext { opacity: 1; transform: translateX(0); }

.cta {
  font-size: 14px; font-weight: 600; padding: 9px 15px; border-radius: 9px;
  background: var(--accent); color: #07210f; border: 1px solid transparent;
  display: inline-flex; align-items: center; gap: 7px;
  transition: transform var(--t), box-shadow var(--t), filter var(--t);
}
.cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(74,222,128,.28); filter: brightness(1.05); }
.cta:active { transform: translateY(0); }

.menu-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 9px; width: 42px; height: 42px; cursor: pointer; align-items: center; justify-content: center; }
.mobile-nav { display: none; }

/* ---------- Buttons / pills ---------- */
.pill { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em; color: var(--accent); background: var(--accent-dim); border: 1px solid color-mix(in oklab, var(--accent) 35%, transparent); padding: 5px 11px; border-radius: 999px; }
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 rgba(74,222,128,.6); animation: ping 2s var(--ease-out) infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(74,222,128,.5); } 70%,100% { box-shadow: 0 0 0 8px rgba(74,222,128,0); } }

.btn-ghost { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--text); border: 1px solid var(--border-2); padding: 11px 18px; border-radius: 10px; transition: border-color var(--t), background var(--t), transform var(--t); }
.btn-ghost:hover { border-color: var(--accent); background: var(--surface); transform: translateY(-1px); }
.btn-solid { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 700; color: #07210f; background: var(--accent); padding: 11px 18px; border-radius: 10px; transition: box-shadow var(--t), transform var(--t), filter var(--t); }
.btn-solid:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(74,222,128,.28); filter: brightness(1.05); }

/* ---------- Hero ---------- */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 72px); }
.hero-grid { display: grid; grid-template-columns: 1.25fr .9fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.hero h1 { font-size: clamp(40px, 7vw, 76px); line-height: .98; letter-spacing: -.035em; margin: 18px 0 0; font-weight: 800; }
.hero h1 .wave { display: inline-block; transform-origin: 70% 70%; animation: wave 2.6s ease-in-out infinite; }
@keyframes wave { 0%,60%,100% { transform: rotate(0); } 10% { transform: rotate(16deg); } 20% { transform: rotate(-8deg); } 30% { transform: rotate(16deg); } 40% { transform: rotate(-4deg); } 50% { transform: rotate(10deg); } }
.hero .lede { color: var(--text-dim); font-size: clamp(16px, 1.6vw, 19px); margin: 22px 0 0; max-width: 52ch; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-photo { position: relative; }
.hero-photo .frame { position: relative; border-radius: 20px; overflow: hidden; border: 1px solid var(--border-2); box-shadow: var(--shadow-lg); aspect-ratio: 4/5; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-photo .frame::after { content: ""; position: absolute; inset: 0; background: linear-gradient(160deg, transparent 55%, rgba(10,12,16,.55)); }
.hero-photo .tag { position: absolute; left: 14px; bottom: 14px; z-index: 2; font-family: var(--font-mono); font-size: 12px; color: var(--text); background: color-mix(in oklab, var(--bg) 70%, transparent); backdrop-filter: blur(6px); border: 1px solid var(--border-2); padding: 7px 11px; border-radius: 9px; }
.hero-photo .orb { position: absolute; inset: -16px; z-index: -1; background: radial-gradient(circle at 60% 40%, rgba(56,189,248,.25), transparent 60%); filter: blur(20px); }

/* terminal chip row */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 44px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 18px; }
.stat .n { font-family: var(--font-mono); font-size: clamp(20px, 2.4vw, 28px); font-weight: 700; color: var(--text); letter-spacing: -.02em; }
.stat .n span { color: var(--accent); }
.stat .l { font-size: 12.5px; color: var(--text-mute); margin-top: 3px; }

/* ---------- Sections ---------- */
section { padding: clamp(44px, 6vw, 78px) 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 30px; flex-wrap: wrap; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); letter-spacing: -.025em; margin: 10px 0 0; font-weight: 800; }
.kicker { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); letter-spacing: .04em; text-transform: uppercase; }
.section-head p { color: var(--text-dim); margin: 8px 0 0; max-width: 60ch; }
.viewall { font-size: 14px; font-weight: 600; color: var(--text-dim); display: inline-flex; gap: 6px; align-items: center; transition: color var(--t), gap var(--t); }
.viewall:hover { color: var(--accent); gap: 9px; }

/* ---------- Cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card-grid.two { grid-template-columns: repeat(2, 1fr); }
.card {
  display: flex; flex-direction: column; gap: 10px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; position: relative; overflow: hidden;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
a.card:hover { transform: translateY(-3px); border-color: var(--border-2); box-shadow: var(--shadow-md); }
.card .cat { font-family: var(--font-mono); font-size: 11.5px; color: var(--accent); letter-spacing: .03em; text-transform: uppercase; }
.card[data-substack="1"] .cat { color: var(--accent-2); }
.card[data-substack="1"] .cat::before { content: "↗ "; }
.card h3 { font-size: 18px; line-height: 1.3; margin: 2px 0 0; letter-spacing: -.01em; font-weight: 700; }
.card p { color: var(--text-dim); font-size: 14.5px; margin: 0; }
.card .meta { margin-top: auto; padding-top: 12px; font-size: 12.5px; color: var(--text-mute); display: flex; align-items: center; gap: 8px; }
.card .arrow { position: absolute; top: 20px; right: 20px; color: var(--text-mute); opacity: 0; transform: translate(-4px,4px); transition: all var(--t); }
a.card:hover .arrow { opacity: 1; transform: translate(0,0); color: var(--accent); }
.card .glow { position: absolute; inset: 0; background: radial-gradient(420px circle at var(--mx,50%) var(--my,0%), rgba(74,222,128,.07), transparent 45%); opacity: 0; transition: opacity var(--t); pointer-events: none; }
a.card:hover .glow { opacity: 1; }

/* ---------- List rows (hub pages) ---------- */
.rows { display: flex; flex-direction: column; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.row {
  display: flex; align-items: center; gap: 16px; padding: 18px 22px; border-bottom: 1px solid var(--border);
  transition: background var(--t); position: relative;
}
.row:last-child { border-bottom: 0; }
a.row:hover { background: var(--surface-2); }
.row .idx { font-family: var(--font-mono); font-size: 12px; color: var(--text-mute); width: 30px; flex: none; }
.row .body { flex: 1; min-width: 0; }
.row .body .t { font-weight: 600; font-size: 15.5px; color: var(--text); }
.row .body .s { font-size: 13px; color: var(--text-mute); margin-top: 2px; }
.row .badge { font-family: var(--font-mono); font-size: 11px; color: var(--accent); border: 1px solid color-mix(in oklab, var(--accent) 30%, transparent); padding: 3px 8px; border-radius: 999px; flex: none; }
.row .go { color: var(--text-mute); flex: none; transition: transform var(--t), color var(--t); }
a.row:hover .go { transform: translateX(3px); color: var(--accent); }

/* ---------- Feature / about ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(28px,5vw,60px); align-items: center; }
.prose p { color: var(--text-dim); margin: 0 0 16px; }
.prose strong { color: var(--text); }
.initiatives { display: grid; gap: 12px; margin-top: 8px; }
.init { display: flex; gap: 13px; padding: 15px 17px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); transition: border-color var(--t), transform var(--t); }
a.init:hover { border-color: var(--border-2); transform: translateX(3px); }
.init .ic { width: 34px; height: 34px; flex: none; border-radius: 9px; background: var(--accent-dim); display: grid; place-items: center; color: var(--accent); }
.init > span:last-child { display: flex; flex-direction: column; }
.init .tt { display: block; font-weight: 700; font-size: 14.5px; }
.init .dd { display: block; font-size: 13px; color: var(--text-mute); margin-top: 1px; }

/* photo collage */
.collage { display: grid; grid-template-columns: 1fr 1fr; grid-auto-rows: 130px; gap: 12px; }
.collage figure { margin: 0; border-radius: 12px; overflow: hidden; border: 1px solid var(--border); position: relative; }
.collage img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 600ms var(--ease-out); }
.collage figure:hover img { transform: scale(1.06); }
.collage .tall { grid-row: span 2; }
.collage .wide { grid-column: span 2; }

/* ---------- Article ---------- */
.article-hero { padding: clamp(40px,6vw,72px) 0 12px; }
.crumbs { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-mute); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.crumbs a { color: var(--text-mute); }
.crumbs a:hover { color: var(--accent); }
.article-hero h1 { font-size: clamp(30px, 4.6vw, 52px); line-height: 1.05; letter-spacing: -.03em; margin: 18px 0 0; font-weight: 800; max-width: 18ch; }
.article-hero .meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--text-mute); font-size: 13.5px; margin-top: 18px; }
.article-hero .meta .badge { font-family: var(--font-mono); font-size: 11px; color: var(--accent); border: 1px solid color-mix(in oklab, var(--accent) 30%, transparent); padding: 3px 9px; border-radius: 999px; }

.article-body { max-width: 720px; margin: 0 auto; padding: 12px 0 20px; font-size: 17px; line-height: 1.75; }
.article-body h2 { font-size: 25px; letter-spacing: -.02em; margin: 42px 0 14px; font-weight: 800; }
.article-body h3 { font-size: 19px; margin: 30px 0 10px; font-weight: 700; }
.article-body p { color: var(--text); margin: 0 0 20px; }
.article-body a { color: var(--accent); text-decoration: underline; text-decoration-color: color-mix(in oklab, var(--accent) 40%, transparent); text-underline-offset: 3px; transition: text-decoration-color var(--t); }
.article-body a:hover { text-decoration-color: var(--accent); }
.article-body ul, .article-body ol { padding-left: 22px; margin: 0 0 20px; color: var(--text); }
.article-body li { margin: 8px 0; }
.article-body strong { color: #fff; }
.article-body img { max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--border); margin: 14px 0; }
.article-body blockquote { margin: 20px 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--accent); color: var(--text-dim); font-style: italic; }
.article-body pre { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; overflow-x: auto; margin: 0 0 22px; }
.article-body pre code { font-family: var(--font-mono); font-size: 13.5px; line-height: 1.6; color: var(--accent-2); white-space: pre; }
.article-body code { font-family: var(--font-mono); font-size: 14px; background: var(--surface-2); padding: 1px 6px; border-radius: 5px; color: var(--accent); }

.article-foot { max-width: 720px; margin: 14px auto 0; padding-top: 26px; border-top: 1px solid var(--border); }

/* ---------- Hub intro ---------- */
.page-hero { padding: clamp(44px,6vw,80px) 0 8px; }
.page-hero h1 { font-size: clamp(32px, 5vw, 54px); letter-spacing: -.03em; margin: 14px 0 0; font-weight: 800; max-width: 20ch; }
.page-hero p { color: var(--text-dim); margin: 16px 0 0; max-width: 62ch; font-size: 17px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 54px 0 40px; background: var(--bg-2); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.foot-grid h4 { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--text-mute); margin: 0 0 14px; }
.foot-grid a { display: block; color: var(--text-dim); font-size: 14px; padding: 5px 0; transition: color var(--t); }
.foot-grid a:hover { color: var(--accent); }
.foot-blurb { color: var(--text-mute); font-size: 14px; max-width: 34ch; margin: 14px 0 0; }
.foot-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--text-mute); font-size: 13px; }
.foot-bottom .socials { display: flex; gap: 8px; }
.foot-bottom .socials a { width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 9px; display: grid; place-items: center; color: var(--text-dim); transition: all var(--t); }
.foot-bottom .socials a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 1; }
/* JS-driven fallback (Firefox/Safari): start hidden, reveal on intersect */
@media (prefers-reduced-motion: no-preference) {
  @supports not (animation-timeline: view()) {
    .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
    .reveal.is-in { opacity: 1; transform: none; }
  }
}
/* Native scroll-timeline (Chromium) */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .reveal { opacity: 0; transform: translateY(16px); animation: rv linear both; animation-timeline: view(); animation-range: entry 0% entry 38%; }
  }
}
@keyframes rv { to { opacity: 1; transform: none; } }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo { max-width: 420px; }
  .about-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .card-grid, .card-grid.two { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-flex; }
  .card-grid, .card-grid.two { grid-template-columns: 1fr; }
  .mobile-nav.open { display: block; border-bottom: 1px solid var(--border); background: var(--bg-2); }
  .mobile-nav .mwrap { padding: 14px 24px 22px; display: flex; flex-direction: column; gap: 2px; }
  .mobile-nav a { padding: 11px 6px; color: var(--text-dim); font-size: 15px; border-bottom: 1px solid var(--border); }
  .mobile-nav a:last-child { border-bottom: 0; }
  .mobile-nav .grp { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; color: var(--text-mute); padding: 14px 6px 4px; letter-spacing: .05em; }
  .foot-grid { grid-template-columns: 1fr; }
  .collage { grid-auto-rows: 110px; }
}