:root{
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  --font-display: 'Poppins', var(--font-sans);
  --radius: 12px;
  --container: 1100px;
  --edge-gap: 20px;
  --transition: 250ms cubic-bezier(.2,.9,.3,1);
}

/* Dark theme (default) */
body.dark{
  --bg: #0b0f12;
  --surface: #0f1720;
  --muted-surface: #111316;
  --text: #e6eef6;
  --muted: #9fb0c5;
  --accent: #6ee7b7;
  --accent-2: #60a5fa;
  background: linear-gradient(180deg, var(--bg), #081018);
  color: var(--text);
}

/* Light theme */
body.light{
  --bg: #f7fafc;
  --surface: #ffffff;
  --muted-surface: #f1f5f9;
  --text: #0b1220;
  --muted: #4b5563;
  --accent: #0ea5a3;
  --accent-2: #2563eb;
  background: var(--bg);
  color: var(--text);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  overflow-x:hidden;
}

.container{max-width:var(--container);margin:0 auto;padding:0 var(--edge-gap)}

.site-header{position:sticky;top:0;backdrop-filter:blur(6px);z-index:40;background:linear-gradient(180deg, rgba(0,0,0,0.25), transparent);border-bottom:1px solid rgba(255,255,255,0.02)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.logo{font-family:var(--font-display);font-weight:700;color:var(--text);text-decoration:none;font-size:1.05rem}
.logo .accent{color:var(--accent)}

.nav a{color:var(--muted);text-decoration:none;margin-left:20px;font-weight:600}
.nav a.cta{background:transparent;border:1px solid rgba(255,255,255,0.06);padding:8px 12px;border-radius:10px;color:var(--text)}
.theme-toggle{background:transparent;border:0;padding:8px 10px;margin-left:12px;border-radius:8px;color:var(--muted);cursor:pointer}

.section{padding:70px 0}
.hero-grid{display:grid;grid-template-columns:1fr 360px;gap:36px;align-items:start}
.hero-content h1{font-family:var(--font-display);font-size:2.2rem;margin:6px 0}
.eyebrow{color:var(--accent-2);font-weight:600}
.lead{color:var(--muted);max-width:65ch}
.links{margin-top:18px}
.btn{display:inline-block;background:linear-gradient(90deg,var(--accent-2),var(--accent));color:#04212a;padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:700;margin-right:10px;transition:transform var(--transition),box-shadow var(--transition)}
.btn:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(6,78,59,0.12)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,0.06)}

.profile-card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));border-radius:var(--radius);padding:18px;border:1px solid rgba(255,255,255,0.03)}
.profile-card h3{margin-top:0}
.meta-list,.contact-list{list-style:none;padding:0;margin:8px 0;color:var(--muted)}
.meta-list li,.contact-list li{margin:8px 0}

.section-title{font-family:var(--font-display);font-size:1.25rem;margin-bottom:8px}
.skill-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:18px}
.skill{background:var(--surface);padding:16px;border-radius:12px;border:1px solid rgba(255,255,255,0.02)}
.skill h3{margin:0 0 6px 0}

.projects-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:18px}
.project-card{background:var(--surface);padding:18px;border-radius:12px;border:1px solid rgba(255,255,255,0.03);display:flex;flex-direction:column;justify-content:space-between;transition:transform var(--transition),box-shadow var(--transition)}
.project-card:hover{transform:translateY(-8px);box-shadow:0 20px 50px rgba(2,8,23,0.5)}
.project-content h3{margin:0 0 6px 0}
.project-actions{margin-top:14px}
.muted{color:var(--muted)}

.goals-grid{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}

.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:12px}
.contact-card{background:var(--surface);padding:14px;border-radius:10px;border:1px solid rgba(255,255,255,0.03)}

.site-footer{Padding:28px 0;border-top:1px solid rgba(255,255,255,0.02);text-align:center;color:var(--muted)}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(18px);transition:opacity 520ms ease,transform 520ms ease}
.reveal.in-view{opacity:1;transform:none}

/* Responsive */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .goals-grid{grid-template-columns:1fr}
  .projects-grid{grid-template-columns:1fr}
  .skill-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .profile-card{order:2}
}

@media (max-width:520px){
  .header-inner{padding:12px 0}
  .logo{font-size:1rem}
  .hero-content h1{font-size:1.6rem}
  .btn{padding:9px 12px}
}

/* Utility */
.muted-small{color:var(--muted);font-size:0.95rem}