:root {
  color-scheme: dark;
  --bg: #07080f;
  --surface: #12141f;
  --surface-2: #1a1d2e;
  --text: #f0f1f7;
  --muted: #c8cdd9;
  --muted-2: #a0a7b8;
  --accent: #5eead4;
  --accent-hover: #99f6e4;
  --accent-violet: #a78bfa;
  --accent-violet-dim: #8b7adb;
  --accent-sky: #38bdf8;
  --border: #2a2f42;
  --border-strong: #3d4560;
  --focus: #a5f3fc;
  --github-green: #238636;
  --github-green-hover: #2ea043;
  --max: 56rem;
  --space: 1.5rem;
  --radius: 10px;
  --radius-sm: 6px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-snap-type: y proximity;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.175rem;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 90% 55% at 50% -15%, rgba(94, 234, 212, 0.14), transparent 55%),
    radial-gradient(ellipse 70% 45% at 100% 5%, rgba(167, 139, 250, 0.1), transparent 50%),
    radial-gradient(ellipse 55% 35% at 0% 90%, rgba(56, 189, 248, 0.08), transparent 45%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  border-bottom: none;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: var(--space);
  top: var(--space);
  outline: 2px solid var(--focus);
}

/* ── Side navigation ─────────────────────────────── */
.side-nav {
  --nav-w: 10.5rem;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: var(--nav-w);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.side-nav-track {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.side-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none !important;
  border-bottom: none !important;
  color: var(--muted);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s ease;
}

.side-nav-link:hover {
  color: var(--accent-hover);
}

.side-nav-link.active {
  color: var(--accent-sky);
}

.side-nav-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border-strong);
  flex-shrink: 0;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.side-nav-link:hover .side-nav-indicator {
  background: var(--accent-sky);
}

.side-nav-link.active .side-nav-indicator {
  background: var(--accent-sky);
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
  transform: scale(1.35);
}

.side-nav-label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--space);
  padding-left: calc(10.5rem + var(--space));
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.75rem 0 2rem;
  border-bottom: none;
  margin-bottom: 0;
  scroll-snap-align: start;
}

.hero h1 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.85rem, 4.5vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero .lede {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.55;
  color: var(--muted);
  max-width: none;
}

.name-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-sky) 45%, var(--accent-violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Sections */
.page-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
  border-bottom: none;
  scroll-snap-align: start;
}

.page-section:last-of-type {
  border-bottom: none;
}

.section-head {
  margin-bottom: 1.35rem;
}

.section-head h2 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-kicker {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-violet-dim);
}

.section-body p {
  margin: 0;
}

.section-body p + p {
  margin-top: 0.85rem;
}

.section-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Cards */
.card {
  position: relative;
  background: linear-gradient(145deg, rgba(26, 29, 46, 0.92), rgba(18, 20, 31, 0.98));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem 1.4rem;
}

.project-card::before,
.blog-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: var(--radius) 0 0 var(--radius);
  background: linear-gradient(180deg, var(--accent), var(--accent-violet));
  opacity: 0.95;
}

.blog-card .card-head {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.blog-card .card-title a {
  color: var(--text);
  border-bottom: none;
}

.blog-card .card-title a:hover {
  color: var(--accent);
}

.card--compact {
  padding: 1.15rem 1.35rem 1.2rem;
}

.card-head {
  margin-bottom: 0.85rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.card-head:has(.card-head-text) {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.card-head-text {
  flex: 1;
  min-width: 0;
}

.card-title {
  margin: 0 0 0.2rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.card-org {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: var(--muted);
  font-weight: 500;
}

.card-meta {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted-2);
  font-variant-numeric: tabular-nums;
}

.card-list {
  margin: 0;
  padding-left: 1.2rem;
}

.card-list li {
  margin-bottom: 0.45rem;
  padding-left: 0.15rem;
}

.card-list li:last-child {
  margin-bottom: 0;
}

.card-list li::marker {
  color: var(--accent-violet-dim);
}

.card-actions {
  margin: 0;
  padding: 0;
  border: none;
  flex-shrink: 0;
  align-self: center;
}

.btn-github {
  border-bottom: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff !important;
  text-decoration: none;
  background: var(--github-green);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-github:hover {
  color: #fff !important;
  background: var(--github-green-hover);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(35, 134, 54, 0.35);
}

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

.btn-github-icon {
  display: block;
  flex-shrink: 0;
  opacity: 0.95;
}

/* Social icons */
.social-icons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.social-link {
  border-bottom: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.social-link:hover {
  color: var(--accent);
  background: var(--surface-2);
  border-color: rgba(94, 234, 212, 0.35);
  transform: translateY(-1px);
}

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

.social-link--disabled {
  cursor: default;
  color: var(--muted-2);
  opacity: 0.55;
}

.social-link--disabled:hover {
  color: var(--muted-2);
  background: var(--surface);
  border-color: var(--border);
  transform: none;
}

.social-svg {
  display: block;
  flex-shrink: 0;
}

.social-svg--stroke {
  overflow: visible;
}

.social-fallback {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

a {
  color: var(--accent-sky);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 189, 248, 0.3);
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  color: var(--accent);
  border-bottom-color: rgba(94, 234, 212, 0.6);
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem var(--space) 2.5rem;
  padding-left: calc(10.5rem + var(--space));
  border-top: 1px solid var(--border);
}

.site-footer p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  .side-nav {
    --nav-w: 0;
    --nav-w-open: 0;
    top: auto;
    bottom: 0;
    left: 0;
    width: 100% !important;
    height: auto;
    flex-direction: row;
    border-right: none;
    border-top: 1px solid var(--border);
    padding: 0.6rem 0;
    background: var(--surface);
  }

  .side-nav-track {
    flex-direction: row;
    gap: 0;
    width: 100%;
    justify-content: space-around;
  }

  .side-nav-link {
    flex-direction: column;
    gap: 0.3rem;
    align-items: center;
  }

  .side-nav-label {
    opacity: 1;
    transform: none;
    font-size: 0.625rem;
    pointer-events: auto;
  }

  .side-nav-indicator {
    width: 5px;
    height: 5px;
  }

  main {
    padding-left: var(--space);
    padding-bottom: 4.5rem;
  }

  .card {
    padding: 1.15rem 1.15rem 1.2rem;
  }
}