:root{
  --bg: #05070d;
  --bg-alt: #090c15;
  --surface: rgba(255,255,255,0.04);
  --surface-strong: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.09);
  --text: #eef1f7;
  --text-dim: #9aa3b8;
  --text-faint: #6b7488;
  --accent: #35e0c0;
  --accent-2: #6ea8fe;
  --accent-soft: rgba(53,224,192,0.12);
  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --radius: 16px;
  --max-w: 1080px;
}

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

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

.container{
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

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

h1,h2,h3,h4{
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

ul{ margin:0; padding:0; list-style:none; }
p{ margin:0; }

/* progress bar */
.progress-bar{
  position: fixed;
  top:0; left:0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* nav */
.nav-wrap{
  position: sticky;
  top:0;
  z-index: 500;
  backdrop-filter: blur(14px);
  background: rgba(5,7,13,0.7);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.nav-wrap.scrolled{
  border-bottom-color: var(--border);
}
.nav{
  display:flex;
  align-items:center;
  justify-content: space-between;
  height: 68px;
}
.brand{
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}
.brand span{ color: var(--accent); }

.nav-links{
  display:flex;
  align-items:center;
  gap: 28px;
}
.nav-link{
  font-size: 0.92rem;
  color: var(--text-dim);
  position: relative;
  padding: 4px 0;
  transition: color .2s ease;
}
.nav-link:hover, .nav-link.active{ color: var(--text); }
.nav-link.active::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:-4px;
  height:2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}

.nav-toggle{
  display:none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span{
  display:block;
  height:2px;
  width: 22px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle.open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity: 0; }
.nav-toggle.open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--border);
  cursor:pointer;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04140f;
  border: none;
  box-shadow: 0 8px 24px -8px rgba(53,224,192,0.5);
}
.btn-ghost{
  background: var(--surface);
  color: var(--text);
}
.btn-ghost:hover{ background: var(--surface-strong); }
.btn-small{
  padding: 8px 18px;
  font-size: 0.85rem;
  background: var(--surface);
}
.btn-small:hover{ background: var(--surface-strong); }

/* hero */
.hero{
  position: relative;
  min-height: 92vh;
  display:flex;
  align-items:center;
  overflow: hidden;
  padding: 80px 0 40px;
}
.hero-bg{ position:absolute; inset:0; z-index:0; }
.grid-overlay{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 40%, transparent 90%);
}
.glow{
  position:absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
}
.glow-1{
  width: 480px; height: 480px;
  background: var(--accent);
  top: -160px; left: -120px;
}
.glow-2{
  width: 420px; height: 420px;
  background: var(--accent-2);
  bottom: -160px; right: -100px;
}
.hero-inner{ position: relative; z-index: 1; }
.eyebrow{
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero h1{
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #ffffff, #b7c0d6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-role{
  margin-top: 10px;
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  color: var(--text-dim);
  font-weight: 500;
}
.hero-summary{
  margin-top: 22px;
  max-width: 640px;
  font-size: 1.05rem;
  color: var(--text-dim);
}
.hero-actions{
  margin-top: 34px;
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-meta{
  margin-top: 40px;
  display:flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-faint);
}
.hero-meta a{ color: var(--text-dim); transition: color .2s ease; }
.hero-meta a:hover{ color: var(--accent); }

.scroll-cue{
  position:absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  display:flex;
  justify-content:center;
  padding-top: 8px;
  z-index: 1;
}
.scroll-cue span{
  width: 4px; height: 8px;
  border-radius: 2px;
  background: var(--accent);
  animation: scrollcue 1.8s ease-in-out infinite;
}
@keyframes scrollcue{
  0%{ opacity:1; transform: translateY(0); }
  70%{ opacity:0; transform: translateY(10px); }
  100%{ opacity:0; transform: translateY(0); }
}

/* sections */
.section{ padding: 110px 0; }
.section-alt{ background: var(--bg-alt); }
.section-kicker{
  color: var(--accent);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title{
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
  margin-bottom: 44px;
  max-width: 640px;
}

.about-text{
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 760px;
  margin-top: -18px;
  margin-bottom: 56px;
}
.about-stats{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat{
  padding: 26px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.stat-num, .stat-suffix{
  font-family: var(--font-head);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text);
}
.stat-suffix{ color: var(--accent); }
.stat-label{
  display:block;
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--text-faint);
}

/* timeline */
.timeline{
  position: relative;
  padding-left: 28px;
  border-left: 1px solid var(--border);
  display:flex;
  flex-direction: column;
  gap: 44px;
}
.timeline-item{ position: relative; }
.timeline-dot{
  position:absolute;
  left: -34px;
  top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.timeline-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
}
.timeline-head{
  display:flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.timeline-head h3{ font-size: 1.2rem; }
.timeline-org{
  color: var(--accent);
  font-weight: 500;
  margin-top: 4px;
  font-size: 0.95rem;
}
.timeline-date{
  color: var(--text-faint);
  font-size: 0.85rem;
  white-space: nowrap;
  padding-top: 4px;
}
.timeline-list{ display:flex; flex-direction:column; gap: 12px; }
.timeline-list li{
  position: relative;
  padding-left: 20px;
  color: var(--text-dim);
  font-size: 0.96rem;
}
.timeline-list li::before{
  content:"";
  position:absolute;
  left:0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
}
.timeline-list strong{ color: var(--text); font-weight: 600; }

/* cards */
.card-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.card:hover{
  transform: translateY(-4px);
  border-color: rgba(53,224,192,0.35);
  background: var(--surface-strong);
}
.card-icon{ font-size: 1.6rem; margin-bottom: 16px; }
.card h3{ font-size: 1.08rem; margin-bottom: 10px; }
.card p{ color: var(--text-dim); font-size: 0.93rem; }

/* tags */
.tag-cloud{
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 64px;
}
.tag{
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.88rem;
  color: var(--text-dim);
  transition: color .2s ease, border-color .2s ease;
}
.tag:hover{ color: var(--accent); border-color: rgba(53,224,192,0.35); }

.edu-title{
  font-size: 1.1rem;
  margin-bottom: 18px;
  color: var(--text);
}
.edu-card{
  display:flex;
  justify-content: space-between;
  align-items:center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.edu-card h4{ font-size: 1.02rem; margin-bottom: 6px; }
.edu-meta{
  display:flex;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* contact */
.contact-section{ text-align:center; }
.contact-inner{ display:flex; flex-direction:column; align-items:center; }
.contact-text{
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}
.contact-links{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
}
.contact-link{
  padding: 22px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  display:flex;
  flex-direction:column;
  gap: 6px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.contact-link:hover{
  transform: translateY(-3px);
  border-color: rgba(53,224,192,0.35);
  background: var(--surface-strong);
}
.contact-link-label{
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}
.contact-link-value{
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}
.contact-link-static{ cursor: default; }
.contact-link-static:hover{ transform:none; border-color: var(--border); background: var(--surface); }

/* footer */
.footer{
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner{
  display:flex;
  justify-content: space-between;
  color: var(--text-faint);
  font-size: 0.85rem;
}
.footer-inner a{ transition: color .2s ease; }
.footer-inner a:hover{ color: var(--accent); }

/* reveal animation */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in-view{
  opacity: 1;
  transform: translateY(0);
}

/* responsive */
@media (max-width: 860px){
  .about-stats{ grid-template-columns: repeat(2, 1fr); }
  .card-grid{ grid-template-columns: repeat(2, 1fr); }
  .contact-links{ grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px){
  .nav-toggle{ display:flex; }
  .nav-links{
    position: absolute;
    top: 68px;
    left: 0; right: 0;
    background: rgba(5,7,13,0.98);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .nav-links.open{ max-height: 420px; }
  .nav-links li{ width: 100%; }
  .nav-link{ display:block; padding: 16px 24px; }
  .nav-link.active::after{ display:none; }
  .nav-links .btn-small{ margin: 12px 24px 20px; }

  .about-stats{ grid-template-columns: 1fr 1fr; }
  .card-grid{ grid-template-columns: 1fr; }
  .contact-links{ grid-template-columns: 1fr 1fr; }
  .timeline-head{ flex-direction: column; }
  .section{ padding: 80px 0; }
  .timeline{ padding-left: 22px; }
  .timeline-dot{ left: -28px; }
}