:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-card: #1a2029;
  --border: #2a323d;
  --text: #e6edf3;
  --text-dim: #9aa7b4;
  --accent: #00ffff;
  --accent-dim: #12b6b6;
  --radius: 14px;
  --max: 1080px;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; }

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

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

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

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

/* Available to screen readers and crawlers, hidden visually. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 12px 20px;
  background: var(--accent);
  color: #04181a;
  font-weight: 600;
  border-radius: 0 0 10px 0;
}

.skip-link:focus {
  left: 0;
}

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

main:focus { outline: none; }

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14, 17, 22, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.brand-logo { width: 30px; height: 30px; }
.brand-name { font-size: 1.05rem; }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s ease;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 88px;
  padding-bottom: 88px;
}

.eyebrow {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.hero-sub {
  color: var(--text-dim);
  font-size: 1.1rem;
  margin: 22px 0 32px;
  max-width: 520px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #04181a;
  box-shadow: 0 8px 24px rgba(0, 255, 255, 0.15);
}

.btn-primary:hover { background: #4dffff; }

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Hero code card */
.code-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--text);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow-x: auto;
}

.code-card::before {
  content: '';
  position: absolute;
  top: 14px;
  left: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff5f56;
  box-shadow: 20px 0 #ffbd2e, 40px 0 #27c93f;
}

.code-card code { display: block; padding-top: 20px; }

.c-kw { color: #ff7edb; }
.c-var { color: #00ffff; }
.c-prop { color: #82aaff; }
.c-str { color: #c3e88d; }

/* Sections */
.section { padding: 72px 24px; }

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 32px;
  font-family: var(--mono);
}

.section-title .accent { color: var(--accent); margin-right: 6px; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.about-grid p { color: var(--text-dim); font-size: 1.05rem; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover { transform: translateY(-4px); border-color: var(--accent-dim); }

.card h3 { font-size: 1.15rem; margin-bottom: 14px; }

.card ul { list-style: none; }

.card ul li {
  color: var(--text-dim);
  padding: 5px 0 5px 20px;
  position: relative;
}

.card ul li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.skills-grid,
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.skills-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Projects */
.project-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.project p { color: var(--text-dim); margin-bottom: 16px; }

.tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  padding: 3px 10px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

/* No link rendered for this card: don't leave a dangling gap. */
.project-tech:last-child { margin-bottom: 0; }

.project-tech span {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
}

.project-link {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.project-link:hover { text-decoration: underline; }

.loading {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.9rem;
  grid-column: 1 / -1;
}

/* Contact */
.contact-lead {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 520px;
  margin-bottom: 28px;
}

.contact-links { display: flex; gap: 14px; flex-wrap: wrap; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.to-top { color: var(--text-dim); transition: color 0.2s ease; }
.to-top:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 56px;
    padding-bottom: 56px;
  }
  .hero-visual { order: -1; }
  .about-grid,
  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.open { max-height: 320px; }
  .nav-links li { border-top: 1px solid var(--border); }
  .nav-links a { display: block; padding: 16px 24px; }
}

/* Blinking terminal cursor */
.cursor {
  display: inline-block;
  width: 0.6em;
  height: 1.1em;
  margin-left: 4px;
  vertical-align: text-bottom;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 1.05s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Glitch hover on cards */
.card {
  position: relative;
}

.card:hover {
  border-color: var(--accent);
  animation: glitch-shift 0.28s steps(2, end) infinite;
}

.card::before,
.card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.1s ease;
}

.card:hover::before {
  opacity: 0.5;
  border: 1px solid #ff2fd0;
  transform: translate(-3px, 2px);
  animation: glitch-a 0.24s steps(2, end) infinite;
}

.card:hover::after {
  opacity: 0.5;
  border: 1px solid var(--accent);
  transform: translate(3px, -2px);
  animation: glitch-b 0.2s steps(2, end) infinite;
}

@keyframes glitch-shift {
  0% { transform: translate(0, -4px); }
  50% { transform: translate(-1px, -4px) skewX(-0.4deg); }
  100% { transform: translate(1px, -4px) skewX(0.4deg); }
}

@keyframes glitch-a {
  0% { clip-path: inset(0 0 60% 0); transform: translate(-3px, 2px); }
  50% { clip-path: inset(50% 0 0 0); transform: translate(-1px, -1px); }
  100% { clip-path: inset(20% 0 30% 0); transform: translate(-3px, 2px); }
}

@keyframes glitch-b {
  0% { clip-path: inset(60% 0 0 0); transform: translate(3px, -2px); }
  50% { clip-path: inset(0 0 55% 0); transform: translate(1px, 1px); }
  100% { clip-path: inset(30% 0 20% 0); transform: translate(3px, -2px); }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  .card:hover,
  .card:hover::before,
  .card:hover::after { animation: none; }
  .card:hover::before,
  .card:hover::after { opacity: 0; }
}