:root {
  --bg: #0b0d12;
  --bg-elev: #12151d;
  --bg-soft: #171b26;
  --border: #232936;
  --text: #e8ecf4;
  --text-dim: #97a1b4;
  --accent: #7c8cff;
  --accent-2: #4dd8c0;
  --amber: #f0b45e;
  --radius: 16px;
  --maxw: 1080px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}

[data-theme="light"] {
  --bg: #f7f8fb;
  --bg-elev: #ffffff;
  --bg-soft: #eef1f7;
  --border: #dde2ec;
  --text: #171a22;
  --text-dim: #5b6475;
  --accent: #4a5cf0;
  --accent-2: #0d9b82;
  --amber: #b8730d;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(124, 140, 255, 0.16), transparent 60%),
    radial-gradient(700px 480px at 95% 5%, rgba(77, 216, 192, 0.12), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

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

.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 140, 255, 0.12), transparent 65%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.4s ease;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 28px;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #0b0d12;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.brand-text {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.nav {
  display: flex;
  gap: 28px;
  font-size: 0.9rem;
}

.nav a {
  position: relative;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

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

.nav a:hover::after {
  transform: scaleX(1);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  cursor: pointer;
  font-size: 1.05rem;
  transition: transform 0.3s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  transform: rotate(25deg);
  border-color: var(--accent);
}

/* Layout */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 88px 0;
  border-top: 1px solid var(--border);
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 40px;
}

.section-title .index {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.lead {
  font-size: 1.4rem;
  line-height: 1.5;
  font-weight: 500;
  max-width: 34ch;
  margin: 0;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding: 80px 0 96px;
}

.eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent-2);
  letter-spacing: 0.06em;
}

.hero-title {
  margin: 0;
  font-size: clamp(3.6rem, 9vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: -0.05em;
  font-weight: 800;
  background: linear-gradient(120deg, var(--text) 25%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-role {
  display: flex;
  align-items: center;
  min-height: 2em;
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--text-dim);
}

.caret {
  display: inline-block;
  width: 9px;
  height: 1.15em;
  margin-left: 4px;
  background: var(--accent);
  animation: blink 1.05s steps(2, start) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-copy {
  margin: 26px 0 34px;
  max-width: 46ch;
  color: var(--text-dim);
  font-size: 1.05rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.93rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.2s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0d12;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -12px rgba(124, 140, 255, 0.7);
}

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

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

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin: 52px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--border);
}

.stat dt {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.stat dd {
  margin: 6px 0 0;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Hero visual */
.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 340px;
}

.orb {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: conic-gradient(from 210deg, var(--accent), var(--accent-2), var(--amber), var(--accent));
  filter: blur(48px);
  opacity: 0.35;
  animation: pulse 9s ease-in-out infinite alternate;
}

@keyframes pulse {
  from { transform: scale(0.9) rotate(0deg); }
  to { transform: scale(1.08) rotate(30deg); }
}

.code-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  box-shadow: 0 30px 70px -40px rgba(0, 0, 0, 0.8);
  overflow: hidden;
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  50% { transform: translateY(-12px); }
}

.code-bar {
  display: flex;
  gap: 7px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-soft) 70%, transparent);
}

.code-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.code-bar span:first-child { background: #ff5f57; }
.code-bar span:nth-child(2) { background: #febc2e; }
.code-bar span:nth-child(3) { background: #28c840; }

.code-card pre {
  margin: 0;
  padding: 22px 22px 26px;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text);
  overflow-x: auto;
}

.tok-kw { color: var(--accent); }
.tok-str { color: var(--accent-2); }
.tok-key { color: var(--amber); }
.tok-var { color: var(--text); }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.about-body p {
  margin: 0 0 18px;
  color: var(--text-dim);
}

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

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.skill-card {
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
}

.skill-card h3 {
  margin: 0 0 16px;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-dim);
}

/* Projects */
.project-list {
  display: grid;
  gap: 18px;
}

.project {
  position: relative;
  padding: 30px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.project::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project[data-accent="teal"]::before { background: var(--accent-2); }
.project[data-accent="amber"]::before { background: var(--amber); }

.project:hover {
  transform: translateX(6px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.project:hover::before {
  opacity: 1;
}

.project-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.project h3 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.project-year {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.project p {
  margin: 10px 0 18px;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: 0.98rem;
}

/* Contact */
.contact .lead {
  max-width: 44ch;
  margin-bottom: 30px;
}

.social {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.92rem;
}

.social a {
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.social a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Footer */
.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 28px 56px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.site-footer p {
  margin: 0;
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translate(-50%, 20px);
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 0.87rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 40;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 48px;
    gap: 40px;
  }

  .hero-visual {
    order: -1;
    min-height: 260px;
  }

  .code-card {
    max-width: 340px;
  }

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

  .lead {
    max-width: none;
  }
}

@media (max-width: 620px) {
  .site-header {
    padding: 14px 20px;
    gap: 12px;
  }

  .brand-text {
    display: none;
  }

  .nav {
    gap: 16px;
    font-size: 0.82rem;
  }

  main {
    padding: 0 20px;
  }

  .section {
    padding: 64px 0;
  }

  .stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .stat dd {
    font-size: 1.35rem;
  }

  .project {
    padding: 24px 22px;
  }

  .site-footer {
    padding: 26px 20px 44px;
  }
}

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