/* ============================================================
   TOKENS
   ============================================================ */
:root{
  --bg: #0A0F1C;
  --surface: #111827;
  --surface-alt: #17213A;
  --border: #263248;
  --text-primary: #EAF0FA;
  --text-secondary: #8A96AC;
  --accent-cyan: #5EEAD4;
  --accent-cyan-dim: rgba(94, 234, 212, 0.15);
  --accent-amber: #F5A623;
  --accent-red: #EF6B6B;

  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-body: 'Inter', system-ui, sans-serif;

  --radius: 10px;
  --max-width: 1080px;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

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

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

code{
  font-family: var(--font-mono);
  background: var(--surface-alt);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--accent-cyan);
}

:focus-visible{
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 28, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-brand{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.nav-brand .dot{
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}
.nav-links{
  display: flex;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.nav-links a:hover{ color: var(--accent-cyan); }
.nav-cta{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: border-color 0.2s, color 0.2s;
}
.nav-cta:hover{ border-color: var(--accent-cyan); color: var(--accent-cyan); }

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

.nav-links a.active{ color: var(--accent-cyan); }

/* page header (used on all non-home pages) */
.page-header{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 8px;
}
.page-header .eyebrow{ margin-bottom: 12px; }
.page-header h1{
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 12px;
}
.page-header .lede{ max-width: 640px; }

/* featured projects */
.featured-label{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-amber);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 20px;
}
.featured-label::before{
  content: '★';
}
.project-card.featured{
  border-color: var(--accent-cyan);
  background: linear-gradient(180deg, var(--accent-cyan-dim), var(--bg) 60%);
}
.subsection-title{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 56px 0 4px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.hero-grid{
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

.terminal-panel{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
}
.terminal-chrome{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
}
.chrome-dot{
  width: 10px; height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.chrome-dot.red{ background: var(--accent-red); }
.chrome-dot.amber{ background: var(--accent-amber); }
.chrome-dot.green{ background: var(--accent-cyan); }
.chrome-title{
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.terminal-body{ padding: 28px 28px 32px; }
.term-line{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0 0 4px;
}
.term-line .prompt{ color: var(--accent-cyan); margin-right: 6px; }
.term-name{
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin: 0 0 20px;
  color: var(--text-primary);
  border-right: 2px solid var(--accent-cyan);
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
}
.term-output{
  font-size: 1.05rem;
  color: var(--text-primary);
  margin: 0 0 22px;
}
.status-list{
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.status-list b{ color: var(--text-primary); font-weight: 600; }

.led{
  display: inline-block;
  width: 9px; height: 9px;
  border-radius: 50%;
  margin-right: 10px;
}
.led.up{ background: var(--accent-cyan); box-shadow: 0 0 6px var(--accent-cyan); }
.led.learning{ background: var(--accent-amber); box-shadow: 0 0 6px var(--accent-amber); }

.term-cta{ display: flex; gap: 12px; flex-wrap: wrap; }

.btn{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 11px 20px;
  border-radius: var(--radius);
  display: inline-block;
  transition: transform 0.15s, border-color 0.15s, background 0.15s;
}
.btn-primary{
  background: var(--accent-cyan);
  color: #06231F;
  font-weight: 600;
}
.btn-primary:hover{ transform: translateY(-2px); }
.btn-ghost{
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-ghost:hover{ border-color: var(--accent-cyan); color: var(--accent-cyan); }

/* topology */
.topology-wrap{ width: 100%; }
#topology{ width: 100%; height: auto; }
.links path{ stroke: var(--border); }
.node circle{
  fill: var(--surface);
  stroke: var(--accent-cyan);
  stroke-width: 1.5;
}
.node-center circle{
  fill: var(--accent-cyan-dim);
  stroke: var(--accent-cyan);
  stroke-width: 2;
}
.node text{ fill: var(--text-primary); font-weight: 500; }
.node-center text{ fill: var(--accent-cyan); font-weight: 700; }

@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .topology-wrap{ order: -1; max-width: 340px; margin: 0 auto; }
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section{ padding: 88px 24px; }
.section.alt{ background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-inner{ max-width: var(--max-width); margin: 0 auto; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  margin: 0 0 12px;
}
.section-title{
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  margin: 0 0 20px;
  max-width: 640px;
}
.lede{
  color: var(--text-secondary);
  max-width: 640px;
  font-size: 1.05rem;
  margin: 0 0 16px;
}

/* skills */
.skill-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 40px;
}
.skill-card{
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.skill-card h3{
  font-size: 1rem;
  font-family: var(--font-mono);
  margin: 0 0 16px;
  color: var(--text-primary);
}
.skill-list{
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* projects */
.project-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 40px;
}
.project-card{
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.2s, transform 0.2s;
}
.project-card:hover{ border-color: var(--accent-cyan); transform: translateY(-3px); }
.project-head{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.project-head h3{ margin: 0; font-size: 1.05rem; }
.tag{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan-dim);
  background: var(--accent-cyan-dim);
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
}
.project-card p{ color: var(--text-secondary); font-size: 0.92rem; margin: 0; flex: 1; }
.project-meta{
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.project-meta a{ color: var(--accent-cyan); }
.project-meta a:hover{ text-decoration: underline; }

/* timeline */
.timeline{
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  position: relative;
  padding-left: 28px;
  border-left: 1px solid var(--border);
}
.timeline-item{ position: relative; }
.timeline-dot{
  position: absolute;
  left: -33px;
  top: 4px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}
.timeline-date{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  margin: 0 0 6px;
}
.timeline-content h3{ margin: 0 0 8px; font-size: 1.05rem; }
.timeline-content p{ margin: 0; color: var(--text-secondary); font-size: 0.92rem; max-width: 560px; }

/* contact */
.contact-links{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* footer */
.footer{
  text-align: center;
  padding: 32px 24px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  border-top: 1px solid var(--border);
}