:root{
  --bg:#fbfaf8;
  --bg-alt:#f3f1ec;
  --card:#ffffff;
  --line:#e5e2da;
  --text:#1a1a18;
  --text-dim:#6b6a63;
  --accent:#1d4ed8;
  --mono:'JetBrains Mono', ui-monospace, monospace;
  --sans:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --maxw:920px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3{font-family:var(--sans);margin:0;line-height:1.2}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.circuit-bg{display:none}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,250,248,.9);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;height:60px}
.brand{font-weight:700;font-size:1.05rem;letter-spacing:.2px}
.brand .dot{color:var(--accent)}
.main-nav{display:flex;gap:30px;align-items:center;margin-left:auto}
.main-nav a{font-size:.9rem;color:var(--text-dim);transition:color .15s}
.main-nav a:hover{color:var(--text)}
.nav-cta{color:var(--text) !important;font-weight:600}
.nav-cta::after{content:'';display:block;height:1px;background:var(--accent);margin-top:2px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{width:20px;height:1.5px;background:var(--text)}

.lang-switch{display:flex;align-items:center;gap:6px;margin-left:24px;font-size:.82rem}
.lang-btn{
  background:none;border:0;cursor:pointer;padding:2px 1px;
  font-family:var(--sans);font-weight:600;color:var(--text-dim);
  border-bottom:1px solid transparent;
}
.lang-btn.is-active{color:var(--text);border-color:var(--text)}
.lang-btn:hover{color:var(--text)}
.lang-sep{color:var(--line)}

/* hero */
.hero{padding:72px 0 64px}
.hero-top{display:flex;align-items:center;gap:22px;margin-bottom:26px}
.hero-avatar{
  width:92px;height:92px;flex-shrink:0;border-radius:50%;
  border:1px solid var(--line);background:var(--card);
  overflow:hidden;
}
.hero-avatar img{width:100%;height:100%;object-fit:cover;object-position:35% 28%;display:block}
.eyebrow{
  font-size:1.1rem;color:var(--text-dim);font-weight:500;
  margin:4px 0 0;
}
.hero h1{
  font-size:clamp(2.1rem,5vw,2.9rem);
  font-weight:800;
  letter-spacing:-.5px;
  margin-bottom:0;
}
.hero-sub{max-width:600px;color:var(--text-dim);font-size:1.2rem;margin-bottom:24px}
.credentials{max-width:600px;display:flex;flex-direction:column;gap:10px;margin:0 0 36px}
.credentials li{position:relative;padding-left:18px;color:var(--text);font-size:1rem}
.credentials li::before{content:'—';position:absolute;left:0;color:var(--text-dim)}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:26px}

.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:13px 26px;border-radius:2px;font-weight:600;font-size:.95rem;
  transition:opacity .15s;
}
.btn:hover{opacity:.85}
.btn-primary{background:var(--text);color:var(--bg)}
.btn-text{color:var(--text-dim);font-size:.92rem;font-weight:500;border-bottom:1px solid var(--line);padding-bottom:2px;transition:color .15s, border-color .15s}
.btn-text:hover{color:var(--text);border-color:var(--text)}

/* sections */
.section{padding:64px 0}
.section-alt{background:var(--bg-alt)}
.section-title{
  display:flex;align-items:baseline;gap:12px;
  font-size:1.4rem;font-weight:700;margin-bottom:36px;
  padding-bottom:16px;border-bottom:1px solid var(--line);
}
.section-title .tag{
  font-family:var(--mono);color:var(--text-dim);font-size:.8rem;font-weight:500;
}

/* about */
.about-grid{display:grid;grid-template-columns:.9fr 1.3fr;gap:48px}
.lead{font-size:1.25rem;color:var(--text);font-weight:600;line-height:1.5}
.about-body p{color:var(--text-dim);margin:0 0 16px}
.about-body strong{color:var(--text)}

/* expertise */
.expertise-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:0;border-left:1px solid var(--line)}
.exp-card{
  padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
}
.exp-card h3{font-size:.82rem;margin-bottom:12px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.4px;font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:6px 14px}
.chips span{font-size:.9rem;color:var(--text)}
.chips.small{gap:6px}
.chips.small span{
  font-size:.78rem;color:var(--text-dim);
  border:1px solid var(--line);padding:3px 9px;border-radius:20px;
}

/* timeline */
.tl-item{
  display:grid;grid-template-columns:150px 1fr;gap:32px;
  padding:32px 0;border-bottom:1px solid var(--line);
}
.tl-date{font-family:var(--mono);color:var(--text-dim);font-size:.85rem;padding-top:2px}
.tl-content h3{font-size:1.1rem;margin-bottom:4px;font-weight:700}
.tl-org{color:var(--text-dim);font-size:.9rem;margin-bottom:14px}
.tl-note{font-size:.82rem;opacity:.8}
.tl-content p{margin:0 0 12px;color:var(--text-dim)}
.tl-content ul{margin:0 0 16px;display:flex;flex-direction:column;gap:7px}
.tl-content li{
  position:relative;padding-left:14px;color:var(--text);font-size:.94rem;
}
.tl-content li::before{content:'—';position:absolute;left:0;color:var(--text-dim)}

/* projects */
.featured-project{
  display:grid;grid-template-columns:1fr;gap:14px;
  border:1px solid var(--text);border-radius:2px;padding:36px;margin-bottom:16px;
}
.fp-icon{display:none}
.fp-badge{
  font-size:.75rem;color:var(--accent);font-weight:600;
  text-transform:uppercase;letter-spacing:.5px;
}
.fp-body h3{font-size:1.6rem;margin:10px 0 14px;font-weight:800}
.fp-body p{color:var(--text-dim);margin:0 0 16px;max-width:640px}

.project-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0;border-left:1px solid var(--line);margin-top:32px}
.proj-card{
  padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
}
.proj-icon{display:none}
.proj-card h3{font-size:1rem;margin-bottom:4px;font-weight:700}
.proj-period{font-family:var(--mono);font-size:.75rem;color:var(--text-dim);margin:0 0 10px}
.proj-card p{color:var(--text-dim);font-size:.9rem;margin:0 0 14px}

/* beyond the day job */
.beyond-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px}
.beyond-media{
  aspect-ratio:16/10;border:1px dashed var(--line);border-radius:2px;
  display:flex;align-items:center;justify-content:center;
  color:var(--text-dim);font-size:.82rem;background:var(--card);margin-bottom:18px;
}
.beyond-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.placeholder-text{color:var(--text-dim);font-size:.9rem;font-style:italic}

/* education */
.edu-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px}
.edu-item{margin-bottom:22px}
.edu-item h3{font-size:1rem;margin-bottom:4px;font-weight:700}
.edu-item p{color:var(--text-dim);margin:0;font-size:.9rem}
.lang-item{
  display:flex;justify-content:space-between;padding:12px 0;
  border-bottom:1px solid var(--line);font-size:.94rem;
}
.lang-level{color:var(--text-dim);font-size:.85rem}

/* contact */
.contact-inner{text-align:left}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0;margin-top:32px;border-left:1px solid var(--line)}
.contact-card{
  display:flex;flex-direction:column;gap:6px;
  padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  transition:background .15s;
}
.contact-card:not(.static):hover{background:var(--card)}
.contact-label{font-size:.72rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px}
.contact-value{font-size:.98rem;font-weight:600}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:24px 0}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--text-dim);font-size:.82rem}

/* responsive */
@media (max-width:760px){
  .hero-top{gap:16px}
  .hero-avatar{width:72px;height:72px}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;padding:20px 24px;gap:18px;
    transform:translateY(-150%);opacity:0;transition:transform .2s, opacity .2s;
  }
  .main-nav.open{transform:translateY(0);opacity:1}
  .nav-toggle{display:flex}
  .about-grid,.edu-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:6px}
}