*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0c10;
  --surface: #111318;
  --surface2: #181b22;
  --border: #1f2330;
  --accent: #00e5ff;
  --accent2: #7c3aed;
  --text: #e8eaf0;
  --muted: #6b7280;
  --font-head: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
  cursor: none;
}

/* Custom cursor */
.cursor {
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  transition: transform 0.15s ease;
  mix-blend-mode: screen;
}
.cursor-ring {
  width: 34px; height: 34px;
  border: 1px solid rgba(0,229,255,0.4);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none;
  z-index: 9998;
  transition: transform 0.35s ease, width 0.2s, height 0.2s;
}

/* Noise overlay */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0; opacity: 0.3;
}

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 60px;
  background: rgba(10,12,16,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.nav-links { display: flex; gap: 36px; list-style: none; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

/* HERO */
#hero {
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 60px 60px;
  position: relative; overflow: hidden;
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}
.hero-glow {
  position: absolute;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(0,229,255,0.07) 0%, transparent 70%);
  top: -100px; right: -200px;
  pointer-events: none;
}
.hero-content { position: relative; max-width: 780px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 28px;
  border: 1px solid rgba(0,229,255,0.25);
  padding: 6px 14px; border-radius: 2px;
}
.hero-tag::before {
  content: ''; width: 6px; height: 6px;
  background: var(--accent); border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}
h1 {
  font-family: var(--font-head);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
h1 span { color: var(--accent); }
.hero-sub {
  color: var(--muted);
  font-size: 1rem;
  max-width: 520px;
  margin-bottom: 44px;
  line-height: 1.8;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 3px;
  transition: all 0.2s;
  cursor: none;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  font-weight: 500;
}
.btn-primary:hover { background: #33ecff; transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,229,255,0.25); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* SECTIONS */
section { padding: 100px 60px; position: relative; }
.section-label {
  font-size: 0.72rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 12px; display: flex; align-items: center; gap: 12px;
}
.section-label::after {
  content: ''; flex: 1; max-width: 60px; height: 1px; background: var(--accent);
}
h2 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 60px;
  letter-spacing: -0.02em;
}

/* ABOUT */
#about { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
.about-left { position: sticky; top: 120px; }
.avatar-box {
  width: 220px; height: 220px;
  border: 1px solid var(--border);
  position: relative;
  margin-bottom: 28px;
  overflow: hidden;
}
.avatar-box::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,229,255,0.1), transparent);
}
.avatar-placeholder {
  width: 100%; height: 100%;
  background: var(--surface2);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; color: var(--border);
}
.about-name {
  font-family: var(--font-head);
  font-size: 1.4rem; font-weight: 700;
  margin-bottom: 4px;
}
.about-title { color: var(--accent); font-size: 0.82rem; letter-spacing: 0.1em; }
.about-right p { color: var(--muted); margin-bottom: 18px; font-size: 0.95rem; }
.skills-grid {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 36px;
}
.skill-tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.75rem;
  padding: 6px 14px;
  letter-spacing: 0.08em;
  transition: border-color 0.2s, color 0.2s;
}
.skill-tag:hover { border-color: var(--accent); color: var(--accent); }

/* PROJECTS */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}
.project-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.project-card:hover::before { transform: scaleX(1); }
.project-card:hover { border-color: rgba(0,229,255,0.3); transform: translateY(-4px); }
.project-icon {
  font-size: 2rem; margin-bottom: 20px;
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface2);
  border: 1px solid var(--border);
}
.project-card h3 {
  font-family: var(--font-head);
  font-size: 1.15rem; font-weight: 700;
  margin-bottom: 10px;
}
.project-card p { color: var(--muted); font-size: 0.88rem; margin-bottom: 20px; line-height: 1.7; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.project-tag {
  font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(0,229,255,0.2);
  padding: 3px 10px;
}

/* CERTIFICATES */
#certificates { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.cert-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 28px;
  display: flex; gap: 20px; align-items: flex-start;
  transition: border-color 0.3s, transform 0.3s;
  position: relative; overflow: hidden;
}
.cert-card:hover { border-color: rgba(0,229,255,0.3); transform: translateY(-3px); }
.cert-badge {
  min-width: 52px; height: 52px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}
.cert-info h3 {
  font-family: var(--font-head);
  font-size: 1rem; font-weight: 700; margin-bottom: 4px;
}
.cert-issuer { color: var(--accent); font-size: 0.75rem; letter-spacing: 0.08em; margin-bottom: 6px; }
.cert-year { color: var(--muted); font-size: 0.75rem; }

/* CONTACT */
#contact { text-align: center; }
#contact h2 { margin-bottom: 16px; }
.contact-sub { color: var(--muted); max-width: 480px; margin: 0 auto 48px; }
.contact-links {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}

/* FOOTER */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 60px;
  display: flex; align-items: center; justify-content: space-between;
  color: var(--muted); font-size: 0.75rem;
}

/* ANIMATIONS */
.fade-up {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: none; }

/* RESPONSIVE */
@media (max-width: 768px) {
  nav { padding: 18px 24px; }
  section { padding: 72px 24px; }
  #hero { padding: 100px 24px 60px; }
  .about-layout { grid-template-columns: 1fr; gap: 40px; }
  .about-left { position: static; }
  footer { flex-direction: column; gap: 10px; text-align: center; }
  .nav-links { gap: 20px; }
}