:root {
  --bg: #0a0a10;
  --surface: #121222;
  --card: #16162b;
  --text: #f5f7ff;
  --muted: #b0b6d6;
  --accent: #8b5cf6;
  --accent2: #00d2ff;
  --line: rgba(255, 255, 255, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 0% 0%, #19193f 0%, var(--bg) 40%), var(--bg);
  line-height: 1.6;
}

.glow {
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(139, 92, 246, 0.2), transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(0, 210, 255, 0.18), transparent 30%);
  filter: blur(26px);
}

.container { width: min(1100px, calc(100% - 2.4rem)); margin: 0 auto; position: relative; z-index: 1; }

.navbar-wrap {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  background: rgba(10, 10, 16, 0.7);
}
.navbar {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: clamp(0.95rem, 1.1vw + 0.55rem, 1.2rem);
  white-space: nowrap;
}
.menu { display: flex; gap: 0.5rem; list-style: none; margin: 0; padding: 0; }
.menu a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  transition: all 0.2s ease;
}
.menu a:hover, .menu a.active { color: var(--text); background: rgba(139, 92, 246, 0.22); }

.hero { padding: 6.5rem 0 4.5rem; }
.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--accent2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
}
h1 { margin: 0; font-size: clamp(2rem, 6vw, 4rem); line-height: 1.08; }
.subtitle { margin: 0.8rem 0 0; color: #cfd4ff; font-size: clamp(1rem, 2.4vw, 1.35rem); }
.lead { margin: 1.2rem 0 0; color: var(--muted); max-width: 62ch; }
.cta {
  margin-top: 1.6rem;
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  color: #060610;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  padding: 0.8rem 1.2rem;
  border-radius: 12px;
  transition: transform 0.2s ease, filter 0.2s ease;
}
.cta:hover { transform: translateY(-2px); filter: brightness(1.08); }

section { padding: 4.5rem 0; }
h2 { margin: 0 0 1.2rem; font-size: clamp(1.45rem, 4.2vw, 2.3rem); }

.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1.4rem;
  align-items: stretch;
}
.about-box, .avatar-box, .card, .study-item {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  border-radius: 16px;
}
.about-box { padding: 1.2rem; color: var(--muted); }
.spec-list { margin: 1rem 0 0; padding: 0; list-style: none; display: grid; gap: 0.65rem; }
.spec-list li { padding: 0.65rem 0.8rem; border-radius: 10px; background: rgba(255,255,255,0.04); color: var(--text); }

.avatar-box {
  width: 100%;
  max-width: 300px;
  aspect-ratio: 5 / 8;
  justify-self: center;
  overflow: hidden;
}
.avatar-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}
.card { overflow: hidden; transition: transform 0.2s ease, border-color 0.2s ease; }
.card:hover { transform: translateY(-4px); border-color: rgba(139, 92, 246, 0.55); }
.thumb { aspect-ratio: 16/9; overflow: hidden; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s ease; }
.card:hover .thumb img { transform: scale(1.05); }
.card-body { padding: 1rem; }
.card-body h3 { margin: 0; font-size: 1.06rem; }
.card-body p { margin: 0.45rem 0 0; color: var(--muted); }
.btn {
  margin-top: 0.9rem;
  display: inline-block;
  text-decoration: none;
  color: #b8f6ff;
  border: 1px solid rgba(0, 210, 255, 0.42);
  border-radius: 10px;
  padding: 0.5rem 0.8rem;
  transition: all 0.2s ease;
}
.btn:hover { background: rgba(0, 210, 255, 0.16); transform: translateY(-2px); }

.timeline { display: grid; gap: 0.85rem; }
.study-item { padding: 1rem 1.1rem; display: grid; grid-template-columns: 90px 1fr; gap: 0.8rem; }
.year { color: #cfd4ff; font-weight: 700; }
.study-item p { margin: 0.2rem 0 0; color: var(--muted); }
.inst { color: var(--accent2); margin-top: 0.2rem; }

.contact-list {
  display: grid;
  gap: 0.8rem;
}
.contact-item {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  color: var(--text);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.contact-item:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 210, 255, 0.5);
}
.contact-label {
  font-size: 0.82rem;
  color: var(--accent2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.contact-value {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
}

.reveal { opacity: 0; transform: translateY(18px); transition: all 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 960px) {
  .navbar {
    min-height: auto;
    padding: 0.7rem 0;
    gap: 0.6rem;
    flex-wrap: wrap;
  }
  .menu { gap: 0.35rem; flex-wrap: wrap; }
  .projects-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-grid {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .avatar-box {
    max-width: 260px;
    margin: 0 auto;
  }
}
@media (max-width: 680px) {
  .container { width: min(1100px, calc(100% - 1.4rem)); }
  .navbar {
    align-items: flex-start;
    gap: 0.45rem;
  }
  .brand { font-size: 0.92rem; }
  .menu { width: 100%; }
  .menu a { font-size: 0.9rem; padding: 0.45rem 0.65rem; }
  .hero { padding-top: 5.2rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .study-item { grid-template-columns: 1fr; }
  .about-box { padding: 1rem; }
  .avatar-box {
    max-width: 220px;
  }
}

@media (max-width: 420px) {
  .brand { font-size: 0.84rem; }
  .menu a {
    font-size: 0.82rem;
    padding: 0.4rem 0.55rem;
  }
}