:root{
  --bg:#0b0f14;
  --panel:#101620;
  --muted:#8aa0b2;
  --text:#e8f0f7;
  --accent:#66d9e8;
  --accent-2:#a78bfa;
  --ring: #1f2a37;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial}
body{background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:16px;z-index:1000;background:#fff;color:#000;padding:8px 12px;border-radius:8px}

.site-header{position:sticky;top:0;z-index:50;background:rgba(11,15,20,.7);backdrop-filter:blur(10px);border-bottom:1px solid #1c2430}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 0}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-weight:800;color:#001018;box-shadow:var(--shadow)}
.logo.small{width:36px;height:36px;border-radius:12px;font-size:.9rem}
.brand-text strong{display:block;font-size:1.1rem}
.brand-text span{display:block;color:var(--muted);font-size:.9rem}

.main-nav ul{display:flex;list-style:none;gap:12px;margin:0;padding:0}
.main-nav a{display:inline-block;padding:8px 12px;border-radius:10px}
.main-nav a:hover{background:#0f1723}

.nav-toggle{display:none}
.actions{display:flex;gap:10px}
.btn{border:1px solid #243142;background:#121a26;color:var(--text);padding:10px 14px;border-radius:12px;box-shadow:var(--shadow)}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border:0;color:#031014;font-weight:700}
.btn.ghost{background:transparent;border-color:#2a384b}

.hero{padding:64px 0 24px;background:radial-gradient(1200px 400px at 70% -10%,rgba(102,217,232,.2),transparent)}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center}
.hero h1{font-size:clamp(2rem,3.5vw,3rem);margin:0 0 12px}
.lead{font-size:1.1rem;color:var(--muted)}
.hero-cta{display:flex;gap:12px;margin-top:18px}
.hero-meta{display:flex;gap:24px;margin-top:28px}
.meta-item{background:var(--panel);padding:16px;border-radius:16px;border:1px solid #1b2533;box-shadow:var(--shadow)}
.meta-kpi{font-weight:800;font-size:1.4rem}
.meta-label{color:var(--muted)}

.section{padding:56px 0;border-top:1px solid #121a1f}
.section h2{font-size:1.8rem;margin:0 0 18px}
.section-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:8px 12px;background:#111826;border:1px solid #233142;border-radius:999px;color:#b9c7d6;cursor:pointer}
.chip.active{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#031014;border:0}

.skills-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.skill-card{background:var(--panel);border:1px solid #1b2533;border-radius:16px;padding:16px;box-shadow:var(--shadow)}
.skill-card h3{margin:0 0 10px}
.skill-card ul{margin:0;padding-left:18px}

.timeline{list-style:none;margin:0;padding:0;border-left:2px dashed #223041;margin-left:10px}
.timeline-item{position:relative;margin-left:20px;padding-left:16px;margin-bottom:18px}
.timeline-item::before{content:"";position:absolute;left:-22px;top:4px;width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 0 0 4px #0b0f14}
.time{color:var(--muted);font-size:.95rem}
.org-where{color:#c3d3e3;margin-bottom:6px}

.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.project-card{background:var(--panel);border:1px solid #1b2533;border-radius:18px;box-shadow:var(--shadow);transition:transform .2s ease}
.project-card:hover{transform:translateY(-3px)}
.project-card .project-meta{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.tag{background:#122033;border:1px solid #203148;color:#9fb4c8;border-radius:999px;padding:4px 8px;font-size:.8rem}
.project-card-inner{padding:16px}
.btn.small{padding:6px 10px;border-radius:10px;font-size:.9rem}

.edu-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.edu-list li{background:var(--panel);border:1px solid #1b2533;border-radius:14px;padding:12px}
.edu-list .period{color:var(--muted);margin-left:6px}

.pill-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.pill-list li{background:#111826;border:1px solid #233142;border-radius:999px;padding:8px 12px;color:#b9c7d6}

.form-row{display:grid;gap:6px;margin-bottom:12px}
input,textarea{background:#0f1622;border:1px solid #243142;border-radius:12px;padding:10px 12px;color:#d9e6f2}
input:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
#formStatus{margin-left:10px;color:var(--muted)}

.site-footer{border-top:1px solid #121a1f;padding:24px 0;margin-top:32px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.footer-brand{display:flex;align-items:center;gap:10px}
.owner{font-weight:700}
.tagline{color:var(--muted)}
.socials{display:flex;gap:12px;list-style:none;margin:0;padding:0}

@media (max-width: 980px){
  .hero-inner{grid-template-columns:1fr}
  .project-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .skills-grid{grid-template-columns:repeat(1,minmax(0,1fr))}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .main-nav ul{display:none}
  .nav-toggle{display:inline-block;border:1px solid #243142;background:#121a26;color:var(--text);padding:8px 10px;border-radius:10px}
  .main-nav[aria-expanded="true"] ul{display:flex;flex-direction:column;gap:6px;background:#0f1622;border:1px solid #243142;padding:10px;border-radius:10px;position:absolute;right:20px;top:60px}
}

/* Light theme */
body.theme-light{
  --bg:#f7fbff;
  --panel:#ffffff;
  --muted:#4a5b6b;
  --text:#0c1218;
  --accent:#2563eb;
  --accent-2:#06b6d4;
  --ring:#e5eef7;
}
body.theme-light .site-header{background:rgba(255,255,255,.8)}