/* ===== Tokens ===== */
:root{
  --bg: #0a0a0d;
  --bg-elev: #121216;
  --bg-elev-2: #17171d;
  --line: rgba(255,255,255,0.08);
  --text: #f2f2f0;
  --text-dim: #9b9ba3;
  --text-dimmer: #6b6b74;
  --accent: #00e5a0;
  --accent-dim: rgba(0,229,160,0.12);
  --accent-2: #ff6b5e;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --maxw: 1080px;
  --radius: 14px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3{ font-family: var(--sans); margin:0; }
p{ margin:0; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }

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

.accent{ color: var(--accent); }

/* subtle grain overlay for texture */
.noise{
  position: fixed; inset:0; pointer-events:none; z-index: 1;
  opacity: 0.035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* site-wide grid background, barely visible, brightens near the cursor */
.bg-grid{
  position: fixed; inset:0; pointer-events:none; z-index:-2;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
}
.bg-grid-spotlight{
  position: fixed; inset:0; pointer-events:none; z-index:-1;
  background-image:
    linear-gradient(to right, var(--accent) 1px, transparent 1px),
    linear-gradient(to bottom, var(--accent) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0;
  -webkit-mask-image: radial-gradient(circle 260px at var(--mx, 50%) var(--my, 0%), black 0%, transparent 72%);
  mask-image: radial-gradient(circle 260px at var(--mx, 50%) var(--my, 0%), black 0%, transparent 72%);
  transition: opacity 0.4s ease;
}
.bg-grid-spotlight.active{ opacity: 0.5; }

/* ===== Header / Nav ===== */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(10,10,13,0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px;
  display:flex; align-items:center; justify-content:space-between;
}
.logo{
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}
.logo .dot{ color: var(--accent); }
.nav-links{
  display:flex; gap: 32px;
}
.nav-links a{
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s ease;
  position:relative;
}
.nav-links a:hover{ color: var(--text); }
.nav-links a::after{
  content:''; position:absolute; left:0; bottom:-6px;
  width:0; height:1px; background: var(--accent);
  transition: width 0.25s ease;
}
.nav-links a:hover::after{ width:100%; }

.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); display:block;
}

/* ===== Hero ===== */
.hero{
  position: relative;
  padding: 120px 0 90px;
}
.hero-inner{ position:relative; z-index:2; }
.eyebrow{
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero h1{
  font-size: clamp(2.6rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.02;
  margin-bottom: 24px;
}
.hero-sub{
  max-width: 640px;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-dim);
  margin-bottom: 32px;
}
.hero-tags{
  display:flex; flex-wrap:wrap; gap:10px;
  margin-bottom: 40px;
}
.tag{
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--text-dim);
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }
.btn{
  display:inline-flex; align-items:center;
  padding: 13px 26px;
  border-radius: 100px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn-primary{
  background: var(--accent);
  color: #07110d;
}
.btn-primary:hover{ transform: translateY(-2px); }
.btn-ghost{
  border: 1px solid var(--line);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }

.btn-sm{ padding: 8px 18px; font-size: 0.82rem; }

/* ===== Summary ===== */
.summary{ padding: 10px 0 80px; }
.summary-text{
  max-width: 760px;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--text-dim);
  border-left: 2px solid var(--accent);
  padding-left: 24px;
}
.summary-text strong{ color: var(--text); }

/* ===== Section shared ===== */
section{ padding: 90px 0; border-top: 1px solid var(--line); }
.section-title{
  display:flex; align-items:baseline; gap:14px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 48px;
}
.idx{
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  background: var(--accent-dim);
  border-radius: 8px;
  padding: 4px 10px;
}
.section-sub{
  color: var(--text-dim);
  margin-top: -32px;
  margin-bottom: 40px;
  max-width: 560px;
}

/* ===== Timeline ===== */
.timeline{ display:flex; flex-direction:column; gap:48px; }
.timeline-item{
  display:grid;
  grid-template-columns: 160px 1fr;
  gap: 32px;
}
.timeline-date{
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-dimmer);
}
.timeline-content h3{
  font-size: 1.3rem;
  margin-bottom: 4px;
}
.timeline-org{
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 14px;
}
.timeline-content ul{ display:flex; flex-direction:column; gap:10px; }
.timeline-content li{
  color: var(--text-dim);
  font-size: 0.97rem;
  position: relative;
  padding-left: 18px;
}
.timeline-content li::before{
  content:'→';
  position:absolute; left:0; color: var(--text-dimmer);
}

/* ===== Education ===== */
.education-list li{
  display:flex; justify-content:space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.education-list li:last-child{ border-bottom:none; }
.edu-date{
  font-family: var(--mono);
  color: var(--text-dimmer);
  font-size: 0.85rem;
}

/* ===== Projects ===== */
.project-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.project-card{
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  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(-3px);
}
.project-tag{
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.project-card h3{ font-size: 1.2rem; }
.project-card p{ color: var(--text-dim); font-size: 0.93rem; flex-grow:1; }
.project-meta{ display:flex; gap:8px; }
.project-meta span{
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dimmer);
  background: var(--bg-elev-2);
  padding: 4px 10px;
  border-radius: 6px;
}
.project-link{
  font-size: 0.9rem;
  color: var(--text);
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: 4px;
}
.project-card:hover .project-link{ color: var(--accent); }
.placeholder-card{
  border-style: dashed;
  opacity: 0.6;
}
.placeholder-card:hover{ opacity: 1; }

/* ===== Contact ===== */
.contact-inner{ text-align:center; }
.contact .section-title{ justify-content:center; }
.contact-text{
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
}
.email-link{
  display:inline-block;
  font-family: var(--mono);
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  color: var(--accent);
  margin-bottom: 36px;
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 6px;
}
.socials{
  display:flex; justify-content:center; gap:26px; flex-wrap:wrap;
}
.socials a{
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.2s ease;
}
.socials a:hover{ color: var(--text); }

.speaking{
  margin: 48px auto 0;
  max-width: 560px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 32px;
  text-align: left;
}
.speaking-label{
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.speaking h3{
  font-size: 1.1rem;
  margin: 10px 0 10px;
}
.speaking p{
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 14px;
}
.speaking a{
  font-size: 0.9rem;
  color: var(--text);
}
.speaking a:hover{ color: var(--accent); }

/* ===== Projects page header ===== */
.projects-hero{ padding: 120px 0 40px; border-top: none; }
.projects-hero-top{
  display:flex; align-items:center; justify-content:space-between;
  flex-wrap:wrap; gap:12px;
  margin-bottom: 28px;
}
.back-link{
  display:inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}
.back-link:hover{ color: var(--accent); }
.projects-hero h1{
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.projects-hero .section-sub{ margin-top:0; }
.projects .project-grid{ margin-top: 0; }

/* ===== Footer ===== */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
}
.footer-inner{
  display:flex; justify-content:space-between;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dimmer);
}

/* ===== Reveal animation ===== */
.reveal{
  opacity:0; transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in{ opacity:1; transform:none; }

/* ===== Responsive ===== */
@media (max-width: 780px){
  .nav-links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; gap:0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    max-height:0; overflow:hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.open{ max-height: 300px; }
  .nav-links li{ padding: 16px 24px; border-top:1px solid var(--line); }
  .nav-toggle{ display:flex; }

  .timeline-item{ grid-template-columns: 1fr; gap:10px; }
  .project-grid{ grid-template-columns: 1fr; }
  .footer-inner{ flex-direction:column; gap:6px; text-align:center; }
}