:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #262d38;
  --text: #e6edf3;
  --muted: #8b98a8;
  --accent: #4cc2ff;
  --accent-2: #7c8cff;
}

* { box-sizing: border-box; margin: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 860px; margin: 0 auto; padding: 0 1.25rem; }

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(124, 140, 255, .25), transparent 60%),
    radial-gradient(700px 400px at 0% 0%, rgba(76, 194, 255, .18), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.hero__inner { display: flex; align-items: center; gap: 2.25rem; }
.hero__pic {
  width: 168px; height: 168px; flex: none;
  border-radius: 50%; object-fit: cover;
  border: 3px solid transparent;
  background: linear-gradient(var(--bg), var(--bg)) padding-box,
              linear-gradient(135deg, var(--accent), var(--accent-2)) border-box;
  box-shadow: 0 10px 40px rgba(76, 194, 255, .2);
}
.eyebrow {
  color: var(--accent); font-size: .85rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
}
h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); line-height: 1.1; margin: .25rem 0 .6rem; letter-spacing: -.02em; }
.hero__title { color: var(--muted); font-size: 1.1rem; }
.hero__title span { color: var(--accent-2); margin: 0 .2rem; }
.hero__links { display: flex; gap: .75rem; margin-top: 1.4rem; }

.btn {
  display: inline-block; padding: .55rem 1.2rem; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text); font-weight: 600; font-size: .95rem;
  transition: transform .15s, border-color .15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-2px); }
.btn--primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06101a; border-color: transparent; }

/* Sections */
main section { padding: 3rem 0 .5rem; }
h2 {
  font-size: 1.5rem; margin-bottom: 1.25rem; letter-spacing: -.01em;
  display: flex; align-items: center; gap: .75rem;
}
h2::after { content: ""; flex: 1; height: 1px; background: var(--border); }
#about p { color: #c4cdd8; margin-bottom: .9rem; max-width: 70ch; }

.stats { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.5rem; }
.stats li { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1rem; text-align: center; }
.stats strong { display: block; font-size: 1.8rem; color: var(--accent); line-height: 1.2; }
.stats span { color: var(--muted); font-size: .85rem; }

/* Timeline */
.timeline { list-style: none; padding: 0 0 0 1.5rem; border-left: 2px solid var(--border); }
.timeline li { position: relative; padding-bottom: 1.75rem; }
.timeline li::before {
  content: ""; position: absolute; left: calc(-1.5rem - 7px); top: .45rem;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent);
}
.timeline li:first-child::before { background: var(--accent); box-shadow: 0 0 0 4px rgba(76, 194, 255, .2); }
.timeline time { color: var(--muted); font-size: .85rem; letter-spacing: .03em; }
.timeline h3 { font-size: 1.1rem; margin: .1rem 0; }

/* Skills */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem; }
.card h3 { font-size: 1rem; margin-bottom: .9rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.chips { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.chips li {
  font-size: .88rem; padding: .3rem .8rem; border-radius: 999px;
  background: rgba(76, 194, 255, .08); border: 1px solid rgba(76, 194, 255, .25);
}

/* Projects */
.project {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.25rem; color: var(--text);
  transition: border-color .15s, transform .15s;
}
.project:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-2px); }
.project h3 { font-size: 1.1rem; color: var(--accent); }
.project p { color: var(--muted); }

footer { margin-top: 4rem; padding: 2rem 0; border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem; text-align: center; }

@media (max-width: 640px) {
  .hero { padding: 3rem 0 2.5rem; }
  .hero__inner { flex-direction: column; text-align: center; }
  .hero__links { justify-content: center; }
  .stats { grid-template-columns: 1fr; }
}

/* JS enhancements */
.hero { position: relative; overflow: hidden; }
#net { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero__inner { position: relative; }
.theme {
  position: absolute; top: 1rem; right: 1rem; z-index: 2; width: 40px; height: 40px;
  border-radius: 50%; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-size: 1.1rem; cursor: pointer; transition: transform .2s, border-color .2s;
}
.theme:hover { transform: rotate(180deg); border-color: var(--accent); }

.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

:root[data-theme="light"] {
  --bg: #f6f8fb; --surface: #ffffff; --border: #dde3ec;
  --text: #14202e; --muted: #5a6877; --accent: #0a7fc2; --accent-2: #5b5fe0;
}
:root[data-theme="light"] #about p { color: #3a4756; }
:root[data-theme="light"] .btn--primary { color: #fff; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Projects grid */
.note { color: var(--muted); font-size: .9rem; margin: -.5rem 0 1.25rem; }
.projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.project { display: flex; flex-direction: column; gap: .75rem; }
.project h3 { color: var(--text); }
.project--link h3 { color: var(--accent); }
.project p { font-size: .95rem; flex: 1; }
.project .chips li { font-size: .78rem; padding: .2rem .65rem; }
article.project:hover { border-color: var(--accent); }