:root {
  --bg: #0a0e14;
  --bg-elev: #10151f;
  --border: #1f2733;
  --text: #e7ecf3;
  --text-dim: #8a94a6;
  --accent: #5eead4;
  --accent-2: #7c9eff;
  --radius: 14px;
  --max-w: 1080px;
  --font: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --bg-elev: #ffffff;
    --border: #e4e7ee;
    --text: #12151c;
    --text-dim: #5b6272;
    --accent: #0f9d8c;
    --accent-2: #3f5fd6;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}

a { color: inherit; text-decoration: none; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.brand .dot { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  margin-right: 24px;
}
.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.15s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-resume { flex-shrink: 0; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}
.nav-links-mobile {
  display: none;
  flex-direction: column;
  padding: 8px 24px 20px;
  border-top: 1px solid var(--border);
}
.nav-links-mobile a {
  padding: 10px 0;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.nav-links-mobile.open { display: flex; }

@media (max-width: 760px) {
  .nav-links, .nav-resume { display: none; }
  .nav-toggle { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #06231e;
}
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, white); }
.btn-outline {
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); }
.btn-ghost {
  color: var(--text-dim);
  border-color: transparent;
}
.btn-ghost:hover { color: var(--text); }

/* Hero */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 24px 80px;
}
.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}
.hero-text { flex: 1; min-width: 0; }
.hero-photo { flex-shrink: 0; }
.hero-photo img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 8%, transparent);
}
@media (max-width: 760px) {
  .hero-inner { flex-direction: column-reverse; text-align: center; gap: 28px; }
  .hero-photo img { width: 160px; height: 160px; }
  .hero-cta, .hero-meta { justify-content: center; }
  .hero h1 { max-width: none; }
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin: 0 0 18px;
  letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  max-width: 18ch;
}
.accent { color: var(--accent); }
.hero-sub {
  color: var(--text-dim);
  font-size: 1.08rem;
  max-width: 62ch;
  margin: 0 0 32px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-meta { color: var(--text-dim); font-size: 0.92rem; }
.hero-meta a { color: var(--text-dim); }
.hero-meta a:hover { color: var(--accent); }
.hero-meta .sep { margin: 0 10px; opacity: 0.5; }

/* Sections */
.section { padding: 72px 0; border-top: 1px solid var(--border); }
.section-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section-label {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin: 0 0 10px;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 36px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text { color: var(--text-dim); font-size: 1.04rem; margin: 0; }
.about-stats { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 20px; }
.about-stats li { display: flex; flex-direction: column; gap: 2px; }
.stat-num { font-family: var(--mono); font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.stat-label { color: var(--text-dim); font-size: 0.88rem; }
@media (max-width: 760px) { .about-grid { grid-template-columns: 1fr; gap: 28px; } }

/* Timeline */
.timeline { position: relative; padding-left: 28px; border-left: 2px solid var(--border); }
.tl-item { position: relative; padding-bottom: 44px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute;
  left: -34px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
.tl-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  margin-bottom: 4px;
}
.tl-head h3 { margin: 0; font-size: 1.08rem; font-weight: 700; }
.tl-company { color: var(--text-dim); font-weight: 500; }
.tl-date { font-family: var(--mono); font-size: 0.82rem; color: var(--text-dim); white-space: nowrap; }
.tl-project { color: var(--accent-2); font-size: 0.92rem; font-weight: 600; margin: 0 0 10px; }
.tl-content ul { margin: 0; padding-left: 20px; color: var(--text-dim); }
.tl-content li { margin-bottom: 6px; font-size: 0.96rem; }

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.skill-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.skill-card h3 { margin: 0 0 14px; font-size: 0.98rem; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 5px 10px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}
.project-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.project-top { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.project-top h3 { margin: 0; font-size: 1.1rem; }
.project-tag { font-family: var(--mono); font-size: 0.74rem; color: var(--text-dim); }
.project-card p { color: var(--text-dim); font-size: 0.94rem; flex-grow: 1; margin: 0 0 18px; }
.project-links { display: flex; flex-wrap: wrap; gap: 16px; }
.project-links a { font-size: 0.88rem; font-weight: 600; color: var(--accent-2); }
.project-links a:hover { color: var(--accent); }
.project-note { font-size: 0.84rem; color: var(--text-dim); font-style: italic; }

/* Certifications */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}
.cert-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.cert-code { font-family: var(--mono); color: var(--accent); font-weight: 700; font-size: 1rem; }
.cert-name { color: var(--text-dim); font-size: 0.88rem; }
.education h3 { font-size: 1rem; margin: 0 0 8px; }
.education p { color: var(--text-dim); margin: 0; }

/* Contact */
.contact-section { text-align: left; }
.contact-sub { color: var(--text-dim); max-width: 56ch; margin: 0 0 28px; }
.contact-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 28px 0 40px; }
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-dim);
  font-size: 0.86rem;
}
.footer-links { display: flex; gap: 18px; }
.footer-links a:hover { color: var(--accent); }

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: reveal 0.7s ease forwards;
}
.hero h1.reveal { animation-delay: 0.05s; }
.hero-sub.reveal { animation-delay: 0.15s; }
.hero-cta.reveal { animation-delay: 0.25s; }
.hero-meta.reveal { animation-delay: 0.35s; }
@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.in-view {
  opacity: 1;
  transform: translateY(0);
}