:root{
  --bg: #0f1724;
  --card: #0b1220;
  --text: #e6eef8;
  --muted: #94a3b8;
  --accent: #7c3aed;
  --accent-2: #06b6d4;
  --glass: rgba(255,255,255,0.03);
  --radius: 12px;
  --container-padding: 20px;
}

/* Light theme */
:root.light{
  --bg: #ffffff;
  --card: #f7f9fc;
  --text: #0b1220;
  --muted: #475569;
  --glass: rgba(11,18,32,0.03);
}

/* Light theme header */
:root.light .site-header{
  background:linear-gradient(180deg,rgba(255,255,255,0.95),rgba(255,255,255,0.85));
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  padding-top:80px;
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
}

.container{max-width:1000px;margin:0 auto;padding:var(--container-padding)}

.site-header{
  backdrop-filter:blur(10px);
  position:fixed;
  top:0;
  left:0;
  right:0;
  width:100%;
  background:linear-gradient(180deg,rgba(15,23,36,0.95),rgba(15,23,36,0.85));
  border-bottom:1px solid var(--glass);
  z-index:100;
  transition:all 0.2s ease;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{font-weight:700;color:var(--text);text-decoration:none;font-size:1.05rem}
.main-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:12px}
.main-nav a{color:var(--muted);text-decoration:none}
.main-nav a:focus,.main-nav a:hover{color:var(--text);outline:none}

.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;padding:8px 12px;border-radius:8px;background:transparent;color:var(--text);cursor:pointer;text-decoration:none}
.btn.small{padding:6px 8px;font-size:0.9rem}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:white}
.btn.outline{border-color:var(--glass);background:transparent}

.hero{padding:64px 0}
.hero-inner{display:flex;gap:28px;align-items:center}
.hero-copy{flex:1}
.hero-visual{width:240px;flex:0 0 240px}
.avatar{
  border-radius:12px;
  box-shadow:0 6px 20px rgba(2,6,23,0.6);
  width:100%;
  height:auto;
  object-fit:cover;
  aspect-ratio:1;
}
.lead{color:var(--muted);font-size:1.05rem;margin-top:8px}

.section{padding:44px 0}

/* Header styles with gradient colors */
h1{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  margin:0 0 16px;
  font-size:2.5rem;
  font-weight:700;
}

h2{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  margin:0 0 16px;
  font-size:1.8rem;
  font-weight:600;
}

h3{
  color:var(--accent);
  margin:0 0 12px;
  font-size:1.3rem;
  font-weight:600;
}

h4{
  color:var(--accent-2);
  margin:0 0 8px;
  font-size:1.1rem;
  font-weight:600;
}

.skills{display:flex;gap:8px;flex-wrap:wrap;padding:0;margin:8px 0 0;list-style:none}
.skills li{background:var(--glass);padding:8px 10px;border-radius:8px;color:var(--muted);font-size:0.95rem}

.projects-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  align-items:start;
  grid-auto-rows:max-content;
}
.card{
  background:var(--card);
  padding:16px;
  border-radius:var(--radius);
  box-shadow:0 6px 20px rgba(2,6,23,0.5);
  border:1px solid var(--glass);
  position:relative;
  z-index:1;
  width:100%;
  box-sizing:border-box;
  display:flex;
  flex-direction:column;
}
.card h3{margin:0 0 6px}
.muted{color:var(--muted)}

.contact-form{max-width:640px;display:grid;gap:10px}
.contact-form label{font-weight:600}
.contact-form input,.contact-form textarea{padding:10px;border-radius:8px;border:1px solid var(--glass);background:transparent;color:var(--text)}
.form-actions{display:flex;gap:10px;align-items:center;margin-top:8px}
.contact-status{margin-top:8px;color:var(--muted);font-size:0.95rem}

.contact-info{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
  margin:24px 0;
  max-width:500px;
}
.contact-item{
  background:var(--card);
  padding:16px;
  border-radius:8px;
  border:1px solid var(--glass);
  text-align:center;
}
.contact-item h4{
  margin:0 0 8px;
  color:var(--accent);
  font-size:0.9rem;
  text-transform:uppercase;
  letter-spacing:0.5px;
}
.contact-item p{
  margin:0;
}
.contact-item a{
  color:var(--text);
  text-decoration:none;
  font-weight:500;
}
.contact-item a:hover{
  color:var(--accent);
}

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

/* New section styles */
.highlights-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
.highlight-item{background:var(--card);padding:16px;border-radius:8px;border:1px solid var(--glass)}
.highlight-item h4{margin:0 0 8px;color:var(--accent);font-size:1rem}
.highlight-item p{margin:0;color:var(--muted);font-size:0.95rem}

.education-item, .experience-item{margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--glass)}
.education-item:last-child, .experience-item:last-child{border-bottom:none}
.education-item h3, .experience-item h3{margin:0 0 8px;color:var(--text)}
.education-item p, .experience-item p{margin:4px 0}

.certificates-list, .publications-list{margin:12px 0;padding-left:20px}
.certificates-list li, .publications-list li{margin-bottom:8px;line-height:1.4}

.skills-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:16px}
.skill-category h4{margin:0 0 12px;color:var(--accent);font-size:1rem}
.skills-list{list-style:none;padding:0;margin:0}
.skills-list li{background:var(--glass);padding:6px 10px;border-radius:6px;margin-bottom:8px;color:var(--muted);font-size:0.9rem}

/* Responsive */
@media (max-width:860px){
  .hero-inner{flex-direction:column-reverse;text-align:center}
  .hero-visual{width:180px}
  .projects-grid{grid-template-columns:repeat(2,1fr)}
  .highlights-grid{grid-template-columns:repeat(2,1fr)}
  .skills-grid{grid-template-columns:1fr}
}

@media (max-width:520px){
  .header-inner{
    flex-wrap:wrap;
    gap:12px;
  }
  .main-nav{
    order:3;
    width:100%;
  }
  .main-nav ul{
    justify-content:center;
    flex-wrap:wrap;
    gap:8px;
  }
  .main-nav a{
    padding:4px 8px;
    font-size:0.9rem;
  }
  .projects-grid{grid-template-columns:1fr}
  .highlights-grid{grid-template-columns:1fr}
  .skills-grid{grid-template-columns:1fr}
  .contact-info{grid-template-columns:1fr}
  .container{padding:16px}
}

/* Focus Visible for keyboard users */
:focus{outline:2px solid transparent;outline-offset:2px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 70%, white);border-radius:8px}