:root {
  --bg: #0a0e17;
  --bg-alt: #0d1320;
  --surface: #111a2b;
  --surface-2: #16213a;
  --border: #23304a;
  --text: #e6ecf5;
  --text-dim: #8a96ac;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --radius: 14px;
  --max-w: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* Background decoration */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
  z-index: -2;
}

.bg-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 700px;
  background: radial-gradient(circle, rgba(56,189,248,0.16) 0%, rgba(129,140,248,0.08) 40%, transparent 70%);
  filter: blur(40px);
  z-index: -1;
  pointer-events: none;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.scrolled {
  border-bottom-color: var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #05070c;
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-small {
  padding: 8px 16px;
  font-size: 0.85rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(56,189,248,0.3);
}
.btn-small:hover { background: rgba(56,189,248,0.2); }

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 24px 60px;
  position: relative;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}
.hero-text, .hero-visual { min-width: 0; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(56,189,248,0.25);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px #4ade80;
}
.hero-text h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1px;
}
.accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.typed-wrap {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.6vw, 1.6rem);
  font-weight: 500;
  color: var(--text-dim);
  margin-top: 12px;
  min-height: 1.6em;
}
.typed { color: var(--text); }
.typed::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 3px;
  vertical-align: -2px;
  animation: blink 0.9s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  margin-top: 24px;
  color: var(--text-dim);
  font-size: 1.02rem;
  max-width: 540px;
}
.hero-desc strong { color: var(--text); }

.hero-cta {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.hero-socials {
  display: flex;
  gap: 18px;
  margin-top: 32px;
}
.hero-socials a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  transition: all 0.2s ease;
}
.hero-socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.photo-frame {
  position: relative;
  width: min(340px, 80vw);
  aspect-ratio: 1 / 1;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 0 0 1px rgba(56,189,248,0.08), 0 30px 60px -20px rgba(0,0,0,0.6);
}
.photo-frame::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 28px;
  padding: 2px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.6;
  pointer-events: none;
}
.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
}
.floating-card {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: rgba(17, 26, 43, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
  animation: float 4s ease-in-out infinite;
}
.card-1 { top: 6%; left: -8%; animation-delay: 0s; }
.card-2 { bottom: 8%; right: -8%; animation-delay: 1.5s; }
.fc-label { font-size: 0.72rem; color: var(--text-dim); }
.fc-value { font-family: var(--font-mono); font-weight: 700; color: var(--accent); font-size: 0.95rem; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 38px;
  border: 2px solid var(--border);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-cue span {
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 4px;
  animation: scrollcue 1.6s ease infinite;
}
@keyframes scrollcue {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(10px); }
}

/* Section shared */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 110px 24px 0;
  scroll-margin-top: 80px;
}
.section:last-of-type { padding-bottom: 110px; }
.section-tag {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 48px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text { color: var(--text-dim); font-size: 1.02rem; }
.about-text strong { color: var(--text); }
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label { color: var(--text-dim); font-size: 0.85rem; }

/* Timeline */
.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 1px solid var(--border);
}
.tl-item {
  position: relative;
  padding-bottom: 44px;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute;
  left: -37.5px;
  top: 4px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.tl-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.tl-head h3 { font-size: 1.15rem; font-weight: 700; }
.tl-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}
.tl-company {
  color: var(--accent-2);
  font-size: 0.9rem;
  font-weight: 500;
  margin: 4px 0 12px;
}
.tl-content ul { display: flex; flex-direction: column; gap: 8px; }
.tl-content li {
  color: var(--text-dim);
  font-size: 0.95rem;
  padding-left: 18px;
  position: relative;
}
.tl-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.tl-content li strong { color: var(--text); }

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.skill-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.skill-card h3 { font-size: 1rem; margin-bottom: 14px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 5px 10px;
  border-radius: 6px;
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.project-top { display: flex; justify-content: flex-end; }
.project-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
}
.project-card h3 { font-size: 1.08rem; }
.project-card p { color: var(--text-dim); font-size: 0.92rem; flex: 1; }

/* Education */
.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.edu-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.edu-meta { display: flex; align-items: center; gap: 14px; }

/* Contact */
.contact-desc { color: var(--text-dim); max-width: 540px; margin-bottom: 40px; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--text-dim);
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.contact-card svg { color: var(--accent); flex-shrink: 0; }
.contact-card:hover { border-color: var(--accent); color: var(--text); transform: translateY(-3px); }

/* Footer */
.footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 100px;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; margin-bottom: 20px; }
  .photo-frame { width: min(260px, 70vw); margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 18px;
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }
}
@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
  .card-1, .card-2 { position: static; margin-top: 12px; animation: none; }
  .floating-card { display: inline-flex; }
}