/* ===== Tokens ===== */
:root{
  --bg:#ffffff;
  --bg-alt:#f6f8fb;
  --surface:#ffffff;
  --border:#e4e8ee;
  --text:#0f172a;
  --text-2:#475569;
  --muted:#64748b;
  --accent:#0369a1;
  --accent-2:#0ea5e9;
  --accent-soft:#e0f2fe;
  --ok:#16a34a;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 4px 16px rgba(15,23,42,.06);
  --radius:14px;
  --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
[data-theme="dark"]{
  --bg:#0b1220;
  --bg-alt:#0f172a;
  --surface:#111a2e;
  --border:#1f2a40;
  --text:#e2e8f0;
  --text-2:#a5b4c8;
  --muted:#8193ab;
  --accent:#38bdf8;
  --accent-2:#7dd3fc;
  --accent-soft:rgba(56,189,248,.12);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  color-scheme:dark;
}

/* ===== Base ===== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.65;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
img{max-width:100%;display:block;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;margin:0;letter-spacing:-.02em}
h2{font-size:clamp(1.75rem,3vw,2.35rem);font-weight:700;margin-bottom:2rem}
h3{font-size:1.1rem;font-weight:650}
p{margin:0 0 1rem}
ul{margin:0;padding:0}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px;border-radius:6px}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ===== Header ===== */
.header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.header.scrolled{border-bottom-color:var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:650}
.brand:hover{text-decoration:none}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--text);color:var(--bg);font-size:.8rem;font-weight:800;letter-spacing:.02em}
.nav{display:flex;align-items:center;gap:4px}
.nav a{color:var(--text-2);font-size:.92rem;font-weight:500;padding:8px 12px;border-radius:8px}
.nav a:hover,.nav a.active{color:var(--text);background:var(--bg-alt);text-decoration:none}
.nav a.nav-cta{color:#fff;background:var(--accent);margin-left:6px}
[data-theme="dark"] .nav a.nav-cta{color:#0b1220}
.nav a.nav-cta:hover{filter:brightness(1.08);background:var(--accent);color:#fff}
[data-theme="dark"] .nav a.nav-cta:hover{color:#0b1220}
.header-actions{display:flex;gap:6px}
.icon-btn{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text-2);cursor:pointer}
.icon-btn:hover{color:var(--text)}
.i-moon{display:none}
[data-theme="dark"] .i-sun{display:none}
[data-theme="dark"] .i-moon{display:block}
.nav-toggle{display:none}

/* ===== Hero ===== */
.hero{padding:72px 0 56px;background:radial-gradient(1200px 500px at 85% -10%,var(--accent-soft),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.85rem;font-weight:550;color:var(--text-2);background:var(--surface);border:1px solid var(--border);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(22,163,74,.5);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(22,163,74,0)}100%{box-shadow:0 0 0 0 rgba(22,163,74,0)}}
.hero h1{font-size:clamp(2.6rem,6vw,4.2rem);font-weight:800;letter-spacing:-.035em}
.tagline{font-size:clamp(1.15rem,2vw,1.4rem);font-weight:600;color:var(--accent);margin:.5rem 0 .75rem}
.role{font-size:.95rem;color:var(--muted);font-weight:500;margin-bottom:1.4rem}
.lead{font-size:1.12rem;color:var(--text-2);max-width:60ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.8rem}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;border-radius:10px;font-weight:600;font-size:.98rem;border:1px solid transparent;transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px -6px var(--accent)}
[data-theme="dark"] .btn-primary{color:#0b1220}
.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border)}
.btn-secondary:hover{border-color:var(--muted)}
.hero-photo{justify-self:center;align-self:center;max-width:340px;width:100%;padding:8px;border-radius:24px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow)}
.hero-photo picture{display:block}
.hero-photo img{width:100%;border-radius:18px;aspect-ratio:3/4;object-fit:cover;object-position:55% 15%}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:64px 0 0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.stats div{padding:22px 24px;border-left:1px solid var(--border)}
.stats div:first-child{border-left:0}
.stats dt{font-size:.82rem;color:var(--muted);font-weight:550;text-transform:uppercase;letter-spacing:.06em}
.stats dd{margin:4px 0 0;font-size:2rem;font-weight:750;letter-spacing:-.02em}

/* ===== Sections ===== */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.kicker{font-size:.8rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.12em;margin-bottom:.6rem}
.about-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:56px}
.about-grid h2{margin-bottom:0}
.prose p{color:var(--text-2);font-size:1.06rem}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 35%,var(--border))}
.card-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:11px;background:var(--accent-soft);color:var(--accent);margin-bottom:18px}
.card h3{margin-bottom:.6rem}
.card p{color:var(--text-2);font-size:.96rem;margin:0}
.card-highlight{border-color:color-mix(in srgb,var(--accent) 45%,var(--border));position:relative}
.card-highlight::after{content:"New";position:absolute;top:22px;right:22px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);background:var(--accent-soft);padding:3px 9px;border-radius:999px}

/* Highlights */
.highlights{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.hl{border-top:2px solid var(--accent);padding-top:18px}
.hl-num{display:block;font-size:2.2rem;font-weight:800;letter-spacing:-.03em;margin-bottom:.4rem}
.hl p{color:var(--text-2);font-size:.95rem;margin:0}

/* Timeline */
.timeline{list-style:none;position:relative}
.job{display:grid;grid-template-columns:200px 1fr;gap:40px;padding:28px 0;border-top:1px solid var(--border)}
.job:first-child{border-top:0;padding-top:0}
.job-meta{display:flex;flex-direction:column;gap:4px;padding-top:2px}
.job-date{font-weight:650;font-size:.92rem}
.job-loc{color:var(--muted);font-size:.88rem}
.job-body h3{font-size:1.18rem}
.job-org{color:var(--accent);font-weight:600;margin:.25rem 0 .8rem}
.job-body ul{list-style:none;display:grid;gap:8px}
.job-body li{position:relative;padding-left:20px;color:var(--text-2);font-size:.97rem}
.job-body li::before{content:"";position:absolute;left:2px;top:.68em;width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* Skills */
.skills{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.skill-group{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.skill-group h3{font-size:.95rem;margin-bottom:14px}
.skill-group-ai{grid-column:span 2;border-color:color-mix(in srgb,var(--accent) 45%,var(--border));background:linear-gradient(135deg,var(--accent-soft),var(--surface) 70%)}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.chips li{font-size:.86rem;font-weight:500;padding:5px 12px;border-radius:999px;background:var(--bg-alt);border:1px solid var(--border);color:var(--text-2)}
.skill-group-ai .chips li{background:var(--surface)}

/* Certs */
.certs{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cert{display:flex;flex-direction:column;gap:6px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 22px;position:relative}
.cert-issuer{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--accent)}
.cert-name{font-weight:600;font-size:.98rem;line-height:1.4;padding-right:44px}
.cert-year{position:absolute;top:18px;right:20px;font-size:.8rem;font-weight:600;color:var(--muted)}
.cert-edu{border-style:dashed}

/* Contact */
.contact{text-align:center;background:radial-gradient(900px 400px at 50% 120%,var(--accent-soft),transparent 70%)}
.contact-inner{max-width:760px}
.contact h2{margin-bottom:1rem}
.contact .lead{margin:0 auto 2rem}
.contact-links{display:flex;justify-content:center;flex-wrap:wrap;gap:16px}
.contact-card{display:flex;align-items:center;gap:14px;text-align:left;padding:16px 22px;border-radius:12px;background:var(--surface);border:1px solid var(--border);color:var(--text);font-weight:600;transition:transform .15s,box-shadow .15s}
.contact-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow)}
.contact-card svg{color:var(--accent)}
.contact-card small{display:block;font-size:.75rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.08em}

/* Footer */
.footer{border-top:1px solid var(--border);padding:28px 0;font-size:.9rem}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer p{margin:0}
.muted{color:var(--muted)}

/* Reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ===== Responsive ===== */
@media (max-width:960px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .highlights{grid-template-columns:repeat(2,1fr);row-gap:32px}
  .certs{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:20px}
}
@media (max-width:860px){
  .nav-toggle{display:grid}
  .nav{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;padding:12px 16px 18px;background:var(--bg);border-bottom:1px solid var(--border);display:none}
  .nav.open{display:flex}
  .nav a{padding:12px}
  .nav a.nav-cta{margin:6px 0 0;text-align:center}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-photo{order:-1;max-width:260px;justify-self:center}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats div:nth-child(3){border-left:0}
  .stats div:nth-child(n+3){border-top:1px solid var(--border)}
  .job{grid-template-columns:1fr;gap:10px}
  .job-meta{flex-direction:row;gap:12px}
}
@media (max-width:600px){
  body{font-size:16px}
  .section{padding:72px 0}
  .cards,.skills,.certs,.highlights{grid-template-columns:1fr}
  .skill-group-ai{grid-column:auto}
  .brand-name{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}
@media print{
  .header,.hero-actions,.contact-links,.footer{display:none}
  .section{padding:24px 0}
  .reveal{opacity:1;transform:none}
}