:root {
  --bg: #0a0e14;
  --bg-elevated: #10161f;
  --border: #1e2733;
  --text: #e6edf3;
  --text-dim: #8b98a5;
  --accent: #5eead4;
  --accent-dim: #2dd4bf33;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --max-width: 960px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(94, 234, 212, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 234, 212, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

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

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(10, 14, 20, 0.8);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-links a:not(.btn) {
  color: var(--text-dim);
  transition: color 0.15s ease;
}

.nav-links a:not(.btn):hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-small { padding: 0.4rem 0.85rem; font-size: 0.82rem; }

.btn-primary {
  background: var(--accent);
  color: #06120f;
  border-color: var(--accent);
  font-weight: 600;
}

.btn-primary:hover {
  background: #4fd8c4;
  border-color: #4fd8c4;
}

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 7rem 1.5rem 6rem;
}

.eyebrow {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-lede {
  max-width: 600px;
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 2.25rem;
}

.hero-lede strong { color: var(--text); }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Sections */
.section {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
  border-top: 1px solid var(--border);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 2.25rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  background: var(--accent-dim);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
}

.about-content p {
  max-width: 680px;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.about-content p:last-child { margin-bottom: 0; }

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border-left: 2px solid var(--border);
  padding-left: 1.75rem;
}

.timeline-item { position: relative; }

.timeline-marker {
  position: absolute;
  left: -2.28rem;
  top: 0.3rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim);
}

.timeline-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline-meta {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.timeline-content p:not(.timeline-meta) { color: var(--text-dim); font-size: 0.95rem; }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.card-head h3 { font-size: 1.1rem; font-weight: 700; }

.card-arrow { color: var(--accent); transition: transform 0.15s ease; }

.card:hover .card-arrow { transform: translateX(3px); }

.card p { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 1rem; }

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-tags span {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.skill-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.skill-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.skill-card p { color: var(--text-dim); font-size: 0.9rem; }

/* Contact */
.contact-lede { color: var(--text-dim); margin-bottom: 1.75rem; max-width: 600px; }

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* Project detail pages */
.detail {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 7rem 1.5rem 6rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.detail h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.detail-meta {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.detail-body { color: var(--text-dim); max-width: 680px; }
.detail-body p { margin-bottom: 1rem; }

/* Responsive */
@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem 1.5rem;
    gap: 1.1rem;
    display: none;
  }

  .nav-links.open { display: flex; }
}

/* Standalone pages */
.page { padding-top: 5rem; min-height: 70vh; }
.page .section:first-child { border-top: none; }
.nav-links a.active:not(.btn) { color: var(--text); }

/* Content additions */
.timeline-content ul { margin: 0.4rem 0 0 1.1rem; color: var(--text-dim); font-size: 0.95rem; }
.timeline-content li { margin-bottom: 0.35rem; }
.chips { margin-top: 0.5rem; }
.skill-card .card-tags { margin-top: 0.25rem; }
.detail-links { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }
.text-link { color: var(--accent); }
.highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}
.highlights div {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
}
.highlights dt { font-family: var(--mono); font-size: 1.4rem; font-weight: 700; color: var(--accent); }
.highlights dd { color: var(--text-dim); font-size: 0.85rem; margin: 0; }

/* Printer stage */
.stage {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.stage-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 16px;
  background:
    radial-gradient(ellipse 60% 70% at 40% 40%, rgba(94, 234, 212, 0.06), transparent 70%),
    var(--bg-elevated);
}

.stage-card canvas {
  display: block;
  width: 100%;
  height: clamp(440px, 58vw, 700px);
  cursor: pointer;
}

.stage-hud {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.stage-status,
.stage-controls .btn {
  pointer-events: auto;
  background: rgba(10, 14, 20, 0.75);
  border: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.stage-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.stage-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.stage-controls { display: flex; gap: 0.5rem; }

.stage-controls .btn {
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  cursor: pointer;
}

button.btn {
  background: transparent;
  font-family: var(--sans);
  cursor: pointer;
}