/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0c10;
  --bg2: #0f1218;
  --surface: #141820;
  --surface2: #1c2230;
  --border: rgba(255,255,255,0.07);
  --accent: #00c8ff;
  --accent2: #0088cc;
  --text: #e8edf5;
  --text-muted: #7a8599;
  --text-dim: #4a5568;
  --font: 'Inter', sans-serif;
  --font-head: 'Space Grotesk', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }

/* ===========================
   NAV
=========================== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,12,16,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
nav ul a {
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 500;
  transition: color var(--transition);
}
nav ul a:hover { color: var(--text); opacity: 1; }
.btn-nav {
  background: var(--accent) !important;
  color: var(--bg) !important;
  padding: 0.4rem 1.1rem;
  border-radius: 6px;
  font-weight: 700 !important;
  font-size: 0.84rem !important;
}
.btn-nav:hover { background: var(--accent2) !important; opacity: 1 !important; }

/* ===========================
   HERO
=========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 2rem 80px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-bg::after {
  content: '';
  position: absolute;
  top: 20%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,200,255,0.06) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(0,200,255,0.1);
  border: 1px solid rgba(0,200,255,0.25);
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}
.accent { color: var(--accent); }
.hero-sub {
  max-width: 620px;
  color: var(--text-muted);
  font-size: 1.08rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}
.hero-stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  display: block;
  font-size: 0.76rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.3rem;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
  display: inline-block;
}
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); opacity: 1; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: border-color var(--transition), transform var(--transition);
  display: inline-block;
}
.btn-secondary:hover { border-color: rgba(255,255,255,0.25); transform: translateY(-1px); opacity: 1; }
.btn-large { padding: 1rem 2.5rem; font-size: 1.05rem; }

/* ===========================
   SECTIONS
=========================== */
.section { padding: 100px 2rem; }
.section-dark { background: var(--bg2); }
.container { max-width: 1200px; margin: 0 auto; }

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section h2 {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}
.section-sub {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 580px;
  margin-bottom: 3rem;
}

/* ===========================
   ABOUT
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.1rem;
  font-size: 0.98rem;
}
.about-text p strong { color: var(--text); }
.expertise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.5rem;
}
.expertise-tags span {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.28rem 0.7rem;
  border-radius: 100px;
}
.about-quote blockquote {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  padding: 1.5rem 1.5rem 1.5rem 2rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
  font-size: 0.91rem;
  font-style: italic;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
blockquote cite {
  display: block;
  margin-top: 0.8rem;
  font-style: normal;
  font-weight: 600;
  color: var(--text);
  font-size: 0.8rem;
}
.current-role, .edu-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1.25rem;
  margin-bottom: 0.75rem;
}
.role-logo {
  background: #ff9900;
  color: #000;
  font-weight: 800;
  font-size: 0.78rem;
  padding: 0.35rem 0.6rem;
  border-radius: 5px;
  flex-shrink: 0;
}
.edu-icon { font-size: 1.4rem; flex-shrink: 0; }
.current-role strong, .edu-card strong { color: var(--text); font-size: 0.9rem; display: block; }
.current-role span, .edu-card span { color: var(--text-muted); font-size: 0.78rem; }

/* ===========================
   TIMELINE
=========================== */
.timeline {
  position: relative;
  padding-left: 2.25rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--surface2));
}
.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -2.6rem;
  top: 8px;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg2);
}
.timeline-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}
.timeline-header h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}
.timeline-tenure { font-size: 0.8rem; color: var(--text-muted); }
.timeline-badge {
  background: rgba(0,200,255,0.12);
  border: 1px solid rgba(0,200,255,0.3);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}
.timeline-role { margin-bottom: 0.65rem; }
.timeline-role strong {
  display: block;
  color: var(--text);
  font-size: 0.93rem;
  font-weight: 600;
}
.timeline-role span { font-size: 0.78rem; color: var(--accent); }
.timeline-content p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 0.7rem;
}
.timeline-content p strong { color: var(--text); }
.timeline-meta {
  display: inline-block;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.28rem 0.7rem;
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

/* ===========================
   PROJECTS
=========================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: border-color var(--transition), transform var(--transition);
}
.project-card:hover { border-color: rgba(0,200,255,0.25); transform: translateY(-2px); }
.project-tag {
  display: inline-block;
  background: rgba(0,200,255,0.08);
  border: 1px solid rgba(0,200,255,0.18);
  color: var(--accent);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}
.project-card h3 {
  font-family: var(--font-head);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.65rem;
  line-height: 1.3;
}
.project-card p {
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.7;
}
.project-card p strong { color: var(--text); }

/* ===========================
   SPECIALTIES
=========================== */
.specialties-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}
.specialty-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: border-color var(--transition);
}
.specialty-card:hover { border-color: rgba(0,200,255,0.2); }
.specialty-icon { font-size: 1.75rem; margin-bottom: 0.6rem; }
.specialty-card h4 {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.specialty-card p {
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

/* ===========================
   CERTIFICATIONS
=========================== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}
.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  transition: border-color var(--transition);
}
.cert-card:hover { border-color: rgba(255,255,255,0.14); }
.cert-featured {
  border-color: rgba(0,200,255,0.3);
  background: linear-gradient(135deg, var(--surface), rgba(0,200,255,0.05));
}
.cert-issuer {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.cert-card h4 {
  font-family: var(--font-head);
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.cert-card p {
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.4;
  margin-bottom: 0.45rem;
}
.cert-date { font-size: 0.72rem; color: var(--text-dim); font-weight: 500; }

/* ===========================
   ORGANIZATIONS
=========================== */
.orgs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1rem;
}
.org-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: border-color var(--transition);
}
.org-item:hover { border-color: rgba(255,255,255,0.14); }
.org-role {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.org-name { font-size: 0.88rem; color: var(--text); font-weight: 500; line-height: 1.4; }

/* ===========================
   CONTACT
=========================== */
.contact-container { text-align: center; }
.contact-container .section-label { display: block; }
.contact-container h2 { margin: 0 auto 1rem; }
.contact-container p.section-sub { margin: 0 auto 2.5rem; }
.contact-links { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===========================
   FOOTER
=========================== */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
  color: var(--text-muted);
}
.footer-links { display: flex; gap: 1.5rem; }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 960px) {
  nav ul { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 768px) {
  .hero-stats { gap: 1.5rem; }
  .section { padding: 70px 1.25rem; }
  .hero { padding: 100px 1.25rem 60px; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: repeat(2,1fr); }
  .specialties-grid { grid-template-columns: repeat(3,1fr); }
  .orgs-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
  .timeline { padding-left: 1.5rem; }
}
@media (max-width: 480px) {
  .certs-grid { grid-template-columns: 1fr; }
  .specialties-grid { grid-template-columns: repeat(2,1fr); }
  .hero-cta, .contact-links { flex-direction: column; }
  .btn-primary, .btn-secondary { text-align: center; }
  .timeline-header { flex-direction: column; }
}