:root {
  --bg: #0b1217;
  --surface: #0f1720;
  --text: #e6eef6;
  --muted: #a8b3c1;
  --card: #0e1a23;
  --border: #173042;
  --accent: #28a745;
  --accent-2: #ff4d4d;
  --link: #4ea1ff;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}
html[data-theme="light"] {
  --bg: #f6f9fc;
  --surface: #ffffff;
  --text: #1f2a37;
  --muted: #58687a;
  --card: #ffffff;
  --border: #e5eef5;
  --link: #1363df;
}
* { box-sizing: border-box; }
html, body { height: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: linear-gradient(180deg, var(--bg), var(--surface));
  color: var(--text);
}
.container { width: min(1100px, 92%); margin: 0 auto; }
.site-header {
  position: sticky; top:0; z-index:100; backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  border-bottom: 1px solid var(--border); transition: box-shadow .2s ease, background .2s ease;
}
.site-header.scrolled { box-shadow: var(--shadow); }
.nav { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:14px 0; }
.brand { font-weight:800; color:var(--text); text-decoration:none; }
.nav-actions { display:flex; align-items:center; gap:8px; }
.nav-links { list-style:none; display:flex; gap:22px; margin:0; padding:0; }
.nav-links a { color:var(--muted); text-decoration:none; font-weight:600; }
.nav-links a:hover { color:var(--text); }
.nav-toggle { display:none; background:none; border:0; cursor:pointer; }
.nav-toggle span{ display:block; width:24px; height:2px; background:var(--text); margin:5px 0; transition:.2s; }
.nav-toggle.open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity:0; }
.nav-toggle.open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }
.theme-toggle { background:none; border:1px solid var(--border); padding:6px 8px; border-radius:10px; cursor:pointer; }
.ico { width:18px; height:18px; fill:currentColor; }

.hero { display:grid; grid-template-columns: 1.2fr .8fr; gap:40px; align-items:center; padding: clamp(48px, 8vh, 96px) 0; }
.hero__text .lead { color:var(--muted); max-width:65ch; }
.gradient-text { font-size: clamp(28px, 4vw, 48px); font-weight:900; background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.socials { display:flex; gap:10px; margin-top:8px; }
.socials a { width:38px; height:38px; display:grid; place-items:center; border:1px solid var(--border); border-radius:10px; color:var(--muted); text-decoration:none; }
.socials a:hover { color:var(--text); border-color:var(--text); }
.hero__art { position:relative; height:280px; }
.blob {
  position:absolute; inset:0; border-radius:24px;
  background: radial-gradient(120px 100px at 20% 20%, color-mix(in srgb, var(--accent) 45%, transparent), transparent),
              radial-gradient(120px 140px at 80% 60%, color-mix(in srgb, var(--accent-2) 45%, transparent), transparent),
              linear-gradient(180deg, color-mix(in srgb, var(--accent) 18%, transparent), transparent);
  filter: blur(12px); opacity:.9; animation: float 7s ease-in-out infinite alternate;
}
.ring { position:absolute; inset:10% 8%; border-radius:24px; border:2px dashed color-mix(in srgb, var(--accent) 30%, var(--border)); }
.ring-2 { inset:14% 12%; border-color: color-mix(in srgb, var(--accent-2) 30%, var(--border)); }
@keyframes float { to { transform: translateY(-10px) scale(1.02); } }

.section { padding:64px 0; }
.section__head { margin-bottom: 18px; }
.section__head h2 { margin:0; font-size: clamp(22px, 3vw, 32px); }
.section__head .sub { color:var(--muted); margin-top:6px; }
.highlights { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap:10px; padding-left:18px; color:var(--muted); }
.highlights li { margin:4px 0; }

.skills-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap:14px; }
.card { background:var(--card); border:1px solid var(--border); border-radius:16px; box-shadow: var(--shadow); padding:16px; }
.card__media { height:140px; }
.gradient-1 { background: linear-gradient(120deg, #28a745, #44c060, #79e3a0); }
.gradient-2 { background: linear-gradient(120deg, #ff4d4d, #fd7c7c, #ffb0b0); }
.gradient-3 { background: linear-gradient(120deg, #1363df, #5ca2ff, #a8caff); }
.card .link { color:var(--link); text-decoration:none; font-weight:700; }
.card .link:hover { text-decoration: underline; }

.grid.projects { display:grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap:18px; }

.timeline { list-style:none; padding:0; margin:0; border-left: 2px dashed var(--border); }
.timeline li { position:relative; padding: 12px 0 12px 18px; }
.timeline .dot { position:absolute; left:-6px; top:18px; width:10px; height:10px; background:var(--accent); border-radius:50%; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.timeline .content h4 { margin:0; }
.timeline .content span { color:var(--muted); font-size:14px; }
.timeline .content ul { margin:8px 0 0 16px; color:var(--muted); }

.edu { display:grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap:14px; }

.grid.two { display:grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap:14px; }

.list { padding-left:18px; color:var(--muted); }

.contact { display:grid; grid-template-columns:1fr 1fr; gap:18px; align-items:start; }
.contact__form .row { display:grid; grid-template-columns: 1fr 1fr; gap:10px; }
.contact__form input, .contact__form textarea { width:100%; padding:12px 14px; border-radius:12px; border:1px solid var(--border); background:var(--surface); color:var(--text); }
.contact__form input:focus, .contact__form textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent); }

.site-footer { border-top:1px solid var(--border); padding:20px 0; }
.footer-inner { display:flex; justify-content:space-between; align-items:center; gap:12px; }
.footer-socials { display:flex; gap:10px; }
.to-top { color:var(--muted); text-decoration:none; }
.to-top:hover { color:var(--text); }

.reveal { opacity:0; transform: translateY(16px); transition:.5s ease; }
.reveal.active { opacity:1; transform: translateY(0); }

.btn { display:inline-flex; align-items:center; gap:8px; padding:10px 14px; border-radius:12px; border:1px solid var(--border); font-weight:700; cursor:pointer; }
.btn-primary { background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent), black 10%)); color:white; border-color: transparent; }
.btn-ghost { background:transparent; color:var(--text); }

@media (max-width: 900px) {
  .hero { grid-template-columns:1fr; }
  .hero__art { order:-1; height:220px; }
}
@media (max-width: 760px) {
  .nav-toggle { display:inline-block; }
  .nav-links { position:absolute; right:4%; top:62px; background:var(--surface); border:1px solid var(--border); border-radius:12px; padding:10px 12px; display:none; flex-direction:column; gap:10px; }
  .nav-links.open { display:flex; }
  .contact { grid-template-columns: 1fr; }
  .contact__form .row { grid-template-columns: 1fr; }
}
/* --- Avatar sizing & ring fit --- */
:root{ --avatar-size: clamp(180px, 28vw, 260px); }

.hero__art{ display:grid; place-items:center; min-height: 320px; position: relative; }
.avatar-wrap{ position:relative; width: var(--avatar-size); height: var(--avatar-size); z-index:3; }
.avatar{
  width:100%; height:100%; object-fit:cover; border-radius:50%;
  box-shadow: var(--shadow);
  border:3px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  background: var(--card);
}

/* Concentric rings perfectly centered around the avatar */
.avatar-wrap::before,
.avatar-wrap::after{
  content:""; position:absolute; border-radius:50%;
  pointer-events:none;
}
/* Outer dashed ring */
.avatar-wrap::before{
  inset:-16px;
  border:2px dashed color-mix(in srgb, var(--accent) 40%, var(--border));
  animation: spin 18s linear infinite;
  opacity:.7;
}
/* Soft glow ring */
.avatar-wrap::after{
  inset:-32px;
  border:2px solid color-mix(in srgb, var(--accent-2) 20%, var(--border));
  box-shadow: 0 0 40px color-mix(in srgb, var(--accent) 15%, transparent);
  opacity:.5;
}

/* Keep blob background effect, but hide rectangular rings where they clash on small screens */
@media (max-width: 900px){
  .ring, .ring-2{ display:none; }
}