/* Isaac Mwendwa Muthui: hub site. Neutral, founder/tech aesthetic. No external fonts (system stack) for speed. */
:root{
  --bg:#fafaf9; --surface:#ffffff; --alt:#f3f3f1; --ink:#111318; --ink-2:#3b3f47; --muted:#6b7079;
  --line:#e5e5e2; --accent:#1f6f5c; --accent-ink:#ffffff; --accent-soft:#e7f1ee; --dark:#0f1115;
  --radius:16px; --radius-sm:10px; --shadow:0 1px 2px rgba(16,24,40,.04),0 4px 16px rgba(16,24,40,.06);
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --display:"Inter Tight","SF Pro Display",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:3px}
a:hover{color:#16564a}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--dark);color:#fff;padding:8px 14px;border-radius:8px;z-index:10}
.skip:focus{left:12px}
.wrap{width:min(1120px,100% - 40px);margin-inline:auto}
.narrow{width:min(760px,100% - 40px)}
.muted{color:var(--muted)}
h1,h2,h3{font-family:var(--display);line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em;color:var(--ink)}
h1{font-size:clamp(2.3rem,5.2vw,4rem);font-weight:750}
h2{font-size:clamp(1.55rem,2.8vw,2.1rem);font-weight:700}
h3{font-size:1.2rem;font-weight:650}
p{margin:0 0 1em}
.lead{font-size:clamp(1.08rem,1.6vw,1.25rem);color:var(--ink-2)}
.eyebrow{font-size:.78rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:0 0 .6em}

/* Header */
.site-header{position:sticky;top:0;z-index:5;background:rgba(250,250,249,.86);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:650}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--dark);color:#fff;font-size:.8rem;letter-spacing:.04em}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:var(--ink-2);text-decoration:none;padding:7px 12px;border-radius:999px;font-size:.95rem}
.nav a:hover{background:var(--alt);color:var(--ink)}
.nav a[aria-current="page"]{background:var(--ink);color:#fff}
.nav-ext{border:1px solid var(--line)}

/* Hero */
.hero{padding:clamp(56px,9vw,112px) 0 clamp(48px,7vw,88px);background:
  radial-gradient(1000px 420px at 85% -10%,rgba(31,111,92,.10),transparent 60%),
  radial-gradient(700px 360px at -10% 110%,rgba(17,19,24,.05),transparent 60%)}
.hero-inner{display:grid;grid-template-columns:1.6fr 1fr;gap:48px;align-items:center}
.hero-text .lead{max-width:40em}
.hero-visual{display:flex;justify-content:center}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none;font-weight:600;font-size:.98rem;transition:transform .15s ease,box-shadow .15s ease,background .15s}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow);color:var(--ink)}
.btn-primary{background:var(--ink);border-color:var(--ink);color:#fff}
.btn-primary:hover{background:#000;color:#fff}
.btn-ghost{background:transparent}

/* Avatar (initials until headshot provided) */
.avatar{display:block;border-radius:50%;overflow:hidden;background:#e9e7e2;box-shadow:0 20px 50px rgba(16,24,40,.18),0 0 0 6px #fff,0 0 0 7px var(--line)}
.avatar img{width:100%;height:100%;object-fit:cover;display:block}
.avatar-lg{width:clamp(180px,26vw,300px);aspect-ratio:1}
.avatar-md{width:112px;height:112px;flex:none}

/* Sections */
.section{padding:clamp(56px,8vw,96px) 0}
.section-alt{background:var(--alt);border-block:1px solid var(--line)}
.section-head{display:flex;flex-direction:column;gap:4px;margin-bottom:32px;max-width:46em}
.page-hero{padding:clamp(48px,7vw,88px) 0 8px}
.about-hero{display:flex;align-items:center;gap:28px;flex-wrap:wrap}

/* Cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;box-shadow:0 1px 0 rgba(16,24,40,.02);transition:box-shadow .2s,transform .2s,border-color .2s}
.card:hover{box-shadow:var(--shadow);border-color:#d9d9d5}
.card p{color:var(--ink-2)}
.card h3 a{text-decoration:none;color:var(--ink)}
.card-link{margin-top:auto;font-weight:600;text-decoration:none;font-size:.95rem}
.card-link:hover{text-decoration:underline}
.role-pill{display:inline-block;align-self:flex-start;font-size:.78rem;font-weight:650;color:var(--accent);background:var(--accent-soft);padding:4px 10px;border-radius:999px;margin:0 0 12px}
.text-link{font-weight:600}
.card-cta{background:linear-gradient(135deg,#111318 0%,#1b2421 60%,#1f3d35 100%);border-color:#1b2421}
.card-cta h3{color:#fff}.card-cta p{color:#c8cdc9}.card-cta .eyebrow{color:#9fb9b0}.card-cta .card-link{color:#fff}

/* Quote */
.quote{margin:8px 0 16px;padding:0 0 0 22px;border-left:3px solid var(--accent);font-family:var(--display);font-size:clamp(1.25rem,2.4vw,1.6rem);line-height:1.35;color:var(--ink);letter-spacing:-.01em}

/* Prose */
.prose h2{margin-top:1.6em}
.role-list{padding:0;list-style:none;margin:0 0 1.2em;border-top:1px solid var(--line)}
.role-list li{padding:12px 0;border-bottom:1px solid var(--line)}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.chips li{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:.92rem;color:var(--ink-2)}

/* Ventures page */
.feature{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap;padding:32px;border-radius:var(--radius);color:#e9ece9;
  background:linear-gradient(135deg,#111318 0%,#1b2421 60%,#1f3d35 100%);margin-bottom:28px}
.feature h2{color:#fff}
.feature p{color:#c8cdc9;max-width:46em}
.feature .eyebrow{color:#9fb9b0}
.feature .btn-primary{background:#fff;color:var(--ink);border-color:#fff}
.venture-list{display:flex;flex-direction:column;gap:14px}
.venture{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px}
.venture p{color:var(--ink-2);margin:0}
.venture h3{margin-bottom:.35em}
.venture-meta{display:flex;flex-direction:column;align-items:flex-end;gap:10px;min-width:180px}
.venture-meta .role-pill{margin:0}

/* Contact */
.contact-grid h3{font-size:1.25rem;word-break:break-word}
.contact-grid h3 a{color:var(--ink)}
.icon-link{display:inline-flex;align-items:center;gap:8px}
.location{margin-top:24px}
.notfound{padding-bottom:96px}

/* Footer */
.site-footer{background:var(--dark);color:#c9ccd1;padding:44px 0 28px;margin-top:0}
.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
.footer-name{color:#fff;font-weight:650;margin:0 0 4px}
.site-footer .muted{color:#9aa0a8;margin:0}
.footer-links{display:flex;flex-wrap:wrap;gap:6px 20px;align-items:center}
.footer-links a{color:#e6e8eb;text-decoration:none;font-size:.95rem}
.footer-links a:hover{color:#fff;text-decoration:underline}
.copyright{margin:28px 0 0;padding-top:20px;border-top:1px solid #23262d;font-size:.85rem;color:#80868f}

@media (max-width:820px){
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-visual{order:-1;justify-content:flex-start}
  .avatar-lg{width:132px}
  .venture{grid-template-columns:1fr}
  .venture-meta{align-items:flex-start;flex-direction:row;flex-wrap:wrap;min-width:0}
  .brand-name{font-size:.95rem}
}
@media (max-width:520px){
  body{font-size:16px}
  .header-inner{padding:10px 0}
  .nav{width:100%;justify-content:space-between;gap:2px;flex-wrap:nowrap}
  .nav a{padding:6px 8px;font-size:.86rem;white-space:nowrap}
  .feature{padding:24px}
  .card,.venture{padding:22px}
  .btn{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}