:root {
  --bg: #0b1220;
  --surface: #111b2e;
  --surface-2: #16233a;
  --card: rgba(255, 255, 255, 0.045);
  --border: rgba(255, 255, 255, 0.12);
  --text: #f4f7fb;
  --muted: #b8c3d6;
  --subtle: #8fa0b8;
  --link: #a99bf7;
  --link-hover: #c9c1ff;
  --accent: #69b7ff;
  --accent-2: #8b7cf6;
  --success: #68d5a5;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.34);
  --radius: 18px;
  --content: 1080px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 680px at 18% -8%, rgba(139, 124, 246, 0.18), transparent 55%),
    radial-gradient(900px 600px at 92% 4%, rgba(59, 165, 255, 0.13), transparent 58%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover { color: var(--link-hover); }

a:focus-visible,
button:focus-visible,
video:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 8px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.88);
  backdrop-filter: blur(18px);
}

.nav-shell,
.footer-shell {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.nav-shell {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 750;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(105, 183, 255, 0.55);
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(105, 183, 255, 0.2), rgba(139, 124, 246, 0.2));
  color: #dceeff;
  font-size: 13px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  padding: 8px 10px;
  border-radius: 9px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.container {
  width: min(calc(100% - 40px), var(--content));
  min-height: calc(100vh - 190px);
  margin: 0 auto;
  padding: 52px 0 80px;
}

h1, h2, h3 {
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.25rem, 5vw, 4.7rem);
}

h2 {
  margin: 48px 0 16px;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

h3 {
  margin: 28px 0 10px;
  font-size: 1.18rem;
}

p { color: var(--muted); }
strong { color: var(--text); }
ul, ol { color: var(--muted); }
li { margin: 7px 0; }
code { color: #d8d1ff; }

.eyebrow {
  margin: 0 0 14px;
  color: var(--success);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero {
  padding: 34px 0 26px;
}

.hero h1 { max-width: 900px; }

.hero-sub {
  max-width: 850px;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.65;
}

.availability {
  max-width: 820px;
  margin: -8px 0 22px;
  color: #c8f3df;
  font-size: 0.98rem;
  font-weight: 650;
}

.btn-note {
  color: var(--subtle);
  font-size: 0.72rem;
  font-weight: 600;
}

.hero-links,
.project-links,
.footer-links,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.055);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
  color: var(--text);
  font-weight: 650;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: rgba(169, 155, 247, 0.55);
  background: rgba(169, 155, 247, 0.13);
  color: var(--text);
}

.btn-primary {
  border-color: rgba(105, 183, 255, 0.6);
  background: linear-gradient(135deg, rgba(105, 183, 255, 0.24), rgba(139, 124, 246, 0.24));
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0 56px;
}

.metric {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 15px;
  background: var(--card);
}

.metric strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 1.25rem;
}

.metric span {
  color: var(--subtle);
  font-size: 13px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin: 58px 0 18px;
}

.section-heading h2 { margin: 0; }
.section-heading p { max-width: 580px; margin: 0; }

.card,
.experience-card,
.project-summary,
.about-card,
.portfolio-intro,
.project-tldr,
.project-end,
.callout {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.card { padding: 22px; margin: 18px 0; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }

.about-card,
.portfolio-intro {
  padding: 22px 24px;
}

.about-card p:first-child,
.portfolio-intro p:first-child { margin-top: 0; }
.about-card p:last-child,
.portfolio-intro p:last-child { margin-bottom: 0; }

.focus-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.focus-list span,
.artifact-note {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 7px 11px;
  border: 1px solid rgba(105, 183, 255, 0.24);
  border-radius: 999px;
  background: rgba(105, 183, 255, 0.08);
  color: #b9ddff;
  font-size: 13px;
  font-weight: 650;
}

.project-grid,
.featured-grid,
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.featured-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.project-card {
  position: relative;
  overflow: hidden;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  transition: transform 180ms ease, border-color 180ms ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(169, 155, 247, 0.5);
}

.project-card > a {
  display: flex;
  height: 100%;
  flex-direction: column;
  color: inherit;
}

.project-card > a:focus-visible { outline-offset: -4px; }

.project-card img,
.project-card video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: #080d17;
  object-fit: cover;
}

.project-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 18px;
}

.project-card-title {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 750;
  line-height: 1.35;
}

.project-card-desc {
  flex: 1;
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
}

.project-card-cta {
  color: var(--link-hover);
  font-size: 14px;
  font-weight: 700;
}

.tag-list { margin: 0 0 14px; }

.tag {
  padding: 4px 8px;
  border: 1px solid rgba(105, 183, 255, 0.24);
  border-radius: 999px;
  background: rgba(105, 183, 255, 0.08);
  color: #b9ddff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.experience-card {
  display: grid;
  grid-template-columns: minmax(200px, 0.34fr) 1fr;
  gap: 28px;
  padding: 24px;
}

.experience-card h3 { margin: 0 0 6px; }
.experience-card p { margin: 4px 0; }

.experience-media {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: 18px;
  margin-top: 4px;
}

.experience-media-item {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #080e19;
}

.experience-media-item img,
.experience-media-item video {
  display: block;
  width: 100%;
  height: 360px;
  border: 0;
  border-radius: 0;
  background: #000;
  object-fit: cover;
}

.experience-media-photo img { object-position: center 68%; }

.experience-media-item figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.project-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 18px 0 20px;
  padding: 18px;
  border-left: 4px solid var(--accent);
}

.project-summary div { min-width: 0; }
.project-summary strong { display: block; margin-bottom: 3px; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
.project-summary span { color: var(--muted); font-size: 14px; }

.project-links { margin: 0 0 30px; }
.project-links { align-items: center; }

.project-tldr {
  margin: 22px 0 34px;
  padding: 18px 22px;
  border-left: 4px solid var(--success);
}

.project-tldr-label {
  margin: 0 0 8px;
  color: var(--success);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.project-tldr ul { margin: 0; padding-left: 20px; }
.project-tldr li { margin: 5px 0; }

.project-end {
  margin-top: 64px;
  padding: 24px;
}

.project-end h2 { margin: 0 0 10px; }

.project-pagination {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.project-pagination a {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.035);
}

.project-pagination a:hover { border-color: rgba(169, 155, 247, 0.55); }
.project-pagination span { color: var(--subtle); font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.project-pagination strong { margin-top: 3px; font-size: 14px; line-height: 1.35; }

.callout { padding: 18px 20px; margin: 22px 0; }
.callout p:last-child { margin-bottom: 0; }

.equation {
  overflow-x: auto;
  margin: 16px 0;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #080e19;
  color: #e6e2ff;
  font-family: "Cambria Math", "Times New Roman", serif;
  font-size: clamp(1rem, 3vw, 1.3rem);
  text-align: center;
}

img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
}

.project-video,
.project-media {
  display: block;
  width: 100%;
  max-width: 900px;
  margin: 18px auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #000;
  box-shadow: var(--shadow);
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.figure-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.figure-card img {
  display: block;
  width: 100%;
  max-height: 420px;
  padding: 8px;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: rgba(255, 255, 255, 0.02);
  object-fit: contain;
}

.figure-card-body { padding: 16px; }
.figure-card-title { color: var(--text); font-weight: 750; }
.figure-card-desc { margin: 6px 0 0; color: var(--muted); font-size: 14px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14px;
}

th, td {
  padding: 10px 12px;
  border: 1px solid var(--border);
  color: var(--muted);
  text-align: left;
}

th { background: rgba(255, 255, 255, 0.06); color: var(--text); }

hr {
  margin: 36px 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(7, 12, 22, 0.6);
}

.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0 34px;
}

.footer-shell p { margin: 4px 0 0; font-size: 13px; }
.footer-shell .footer-status { color: var(--subtle); font-size: 12px; }
.footer-links { justify-content: flex-end; }
.footer-links a { color: var(--muted); font-size: 14px; font-weight: 650; }

@media (max-width: 820px) {
  .featured-grid { grid-template-columns: 1fr; }
  .project-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .nav-shell { min-height: auto; align-items: flex-start; flex-direction: column; gap: 8px; padding: 12px 0; }
  .site-nav { width: 100%; flex-wrap: wrap; gap: 0; padding-bottom: 2px; }
  .site-nav a { padding: 7px 6px; font-size: 13px; white-space: nowrap; }
  .container { width: min(calc(100% - 28px), var(--content)); padding: 34px 0 56px; }
  .hero { padding-top: 18px; }
  .project-grid, .skills-grid, .figure-grid { grid-template-columns: 1fr; }
  .project-summary { grid-template-columns: 1fr; }
  .project-pagination { grid-template-columns: 1fr; }
  .experience-card { grid-template-columns: 1fr; gap: 12px; }
  .experience-media { grid-template-columns: 1fr; margin-top: 10px; }
  .experience-media-item img, .experience-media-item video { height: auto; max-height: 420px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .footer-shell { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}