:root{
  --bg: #0f1724;
  --card-bg: #0b1220;
  --text: #e6eef8;
  --muted: #9fb0c8;
  --accent: #06b6d4; /* cyan */
  --glass: rgba(255,255,255,0.04);
  --radius: 14px;
  --max-width: 1100px;
  --gap: 1.25rem;
  --shadow: 0 8px 30px rgba(2,6,23,0.6);
  font-synthesis: none;
}

/* Alternative theme - cyan */
.theme-1 {
  --bg: #021826;
  --card-bg: #062235;
  --text: #e6f7fb;
  --muted: #9fd3df;
  --accent: #22d3ee;
  --glass: rgba(255,255,255,0.03);
}

/* Alternative theme - purple */
.theme-2 {
  --bg: #0b0520;
  --card-bg: #14092b;
  --text: #f1e9ff;
  --muted: #cdbfe8;
  --accent: #7c3aed;
  --glass: rgba(255,255,255,0.03);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg,var(--bg), #06463b 60%);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
}

/* Container */
.container{
  max-width:var(--max-width);
  margin:0 auto;
  padding:2rem;
}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:40;
  backdrop-filter: blur(6px);
  background: linear-gradient(180deg, rgba(2,6,23,0.35), rgba(2,6,23,0.10));
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{font-weight:700;color:var(--text);text-decoration:none;font-size:1.05rem}
.main-nav{display:flex;align-items:center;gap:0.6rem}
.main-nav a{color:var(--muted);text-decoration:none;padding:0.5rem;border-radius:8px;font-size:0.95rem}
.main-nav a:hover{color:var(--text);background:var(--glass)}

/* small theme buttons */
.theme-btn{
  width:14px;height:14px;border-radius:50%;border:none;margin-left:6px;cursor:pointer;
  box-shadow:0 2px 6px rgba(0,0,0,0.4);
  outline: none;
}
.theme-btn[data-theme="theme-default"]{background:var(--accent)}
.theme-btn[data-theme="theme-1"]{background:#06b6d4}
.theme-btn[data-theme="theme-2"]{background:#7c3aed}

/* Hero */
.hero{padding:3rem 0}
.hero-grid{display:grid;grid-template-columns:1fr 320px;gap:2rem;align-items:center}
.hero-text h1{margin:0;font-size:2.1rem}
.lead{color:var(--muted);margin-top:0.6rem}
.cta{margin-top:1.2rem;display:flex;gap:0.6rem}
.btn{
  background:var(--accent);color:#04111a;padding:0.6rem 1rem;border-radius:10px;border:none;text-decoration:none;font-weight:600;cursor:pointer;
  box-shadow:var(--shadow);
}
.btn:hover{transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,0.06)}

/* Profile card + crop */
.hero-card{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  padding:1.6rem;border-radius:16px;border:1px solid rgba(255,255,255,0.03);
  display:flex;flex-direction:column;align-items:center;text-align:center;
}
.profile-pic{
  width:150px;height:150px;border-radius:50%;overflow:hidden;border:4px solid rgba(255,255,255,0.04);box-shadow:0 6px 20px rgba(2,6,23,0.6);margin:0 auto 0.9rem;
}
.profile-pic img{width:100%;height:100%;object-fit:cover;display:block}

/* About */
.about{background:var(--card-bg);margin-top:1rem;padding:1.4rem;border-radius:12px;border:1px solid rgba(255,255,255,0.03)}
.about h2{margin-top:0}

/* Skills */
.skills-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
.skill h4{margin:0 0 0.4rem 0}
.bar{background:rgba(255,255,255,0.03);height:10px;border-radius:999px;overflow:hidden}
.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),rgba(255,255,255,0.06))}

/* Projects */
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:0.8rem}
.project-card{background:var(--card-bg);padding:1rem;border-radius:12px;border:1px solid rgba(255,255,255,0.03)}
.project-card h3{margin:0 0 0.4rem 0}
.tags{color:var(--muted);font-size:0.85rem;margin-top:0.6rem}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 320px;gap:1.2rem}
.contact-form label{display:block;margin-bottom:0.6rem;font-size:0.95rem}
.contact-form input, .contact-form textarea{
  width:100%;padding:0.6rem;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:var(--text)
}
.contact-form button{margin-top:0.6rem}

/* Footer */
.site-footer{padding:1rem 0;text-align:center;color:var(--muted);border-top:1px solid rgba(255,255,255,0.03);margin-top:2rem}

/* Responsive */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr 300px}
  .projects-grid{grid-template-columns:repeat(2,1fr)}
  .skills-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .header-inner{flex-direction:column;align-items:flex-start}
  .hero-grid{grid-template-columns:1fr;gap:1.2rem}
  .projects-grid{grid-template-columns:1fr}
  .main-nav{gap:0.4rem;flex-wrap:wrap}
  .container{padding:1rem}
}