:root {
  color-scheme: light;
  --bg: #f5f7fa;
  --bg-strong: #ffffff;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-solid: #ffffff;
  --ink: #101318;
  --muted: #5f6977;
  --line: rgba(16, 19, 24, 0.12);
  --line-strong: rgba(16, 19, 24, 0.22);
  --accent: #1166dd;
  --accent-2: #087f5b;
  --accent-3: #c2410c;
  --accent-4: #a21caf;
  --shadow: 0 24px 70px rgba(30, 41, 59, 0.12);
  --radius: 8px;
  --max: 1160px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101318;
  --bg-strong: #161b22;
  --surface: rgba(22, 27, 34, 0.86);
  --surface-solid: #161b22;
  --ink: #f5f7fa;
  --muted: #a8b3c4;
  --line: rgba(245, 247, 250, 0.14);
  --line-strong: rgba(245, 247, 250, 0.28);
  --accent: #7aa7ff;
  --accent-2: #4ade80;
  --accent-3: #fb923c;
  --accent-4: #f0abfc;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(135deg, rgba(17, 102, 221, 0.12), transparent 32rem),
    linear-gradient(225deg, rgba(8, 127, 91, 0.1), transparent 28rem),
    linear-gradient(180deg, var(--bg), var(--bg-strong));
  color: var(--ink);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.35), transparent 70%);
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--bg);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0.75rem;
}

.nav-shell {
  width: min(var(--max), calc(100% - 1rem));
  min-height: 4.75rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.brand,
.nav-links,
.nav-actions,
.hero-actions,
.repo-toolbar {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.75rem;
  text-decoration: none;
}

.brand-mark {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 24%, transparent), transparent),
    var(--surface-solid);
  color: var(--ink);
  font-weight: 900;
}

.brand-copy {
  display: grid;
  gap: 0.1rem;
}

.brand-copy strong,
.brand-copy small {
  white-space: nowrap;
}

.brand-copy small {
  color: var(--muted);
  font-weight: 700;
}

.nav-links {
  gap: 0.25rem;
}

.nav-links a,
.nav-button,
.button,
.theme-toggle,
.repo-filter {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-links a,
.repo-filter {
  padding: 0 0.85rem;
  color: var(--muted);
}

.nav-links a:hover,
.nav-links a:focus-visible,
.repo-filter:hover,
.repo-filter:focus-visible,
.repo-filter.active {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--ink);
}

.nav-actions {
  gap: 0.5rem;
}

.nav-button,
.button.primary {
  padding: 0 1rem;
  border: 1px solid color-mix(in srgb, var(--accent) 72%, var(--line));
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 12px 30px color-mix(in srgb, var(--accent) 24%, transparent);
}

.button.secondary {
  padding: 0 1rem;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.button:hover,
.nav-button:hover,
.contact-card:hover,
.project-card:hover,
.case-card:hover,
.repo-card:hover,
.skill-card:hover,
.timeline-item:hover {
  transform: translateY(-3px);
}

.button,
.nav-button,
.contact-card,
.project-card,
.case-card,
.repo-card,
.skill-card,
.timeline-item {
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.theme-toggle {
  padding: 0 0.75rem;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.toggle-track {
  width: 2.25rem;
  height: 1.25rem;
  display: inline-flex;
  align-items: center;
  padding: 0.15rem;
  border-radius: 99rem;
  background: color-mix(in srgb, var(--ink) 14%, transparent);
}

.toggle-track span {
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 99rem;
  background: var(--accent);
  transition: transform 180ms ease, background 180ms ease;
}

:root[data-theme="dark"] .toggle-track span {
  transform: translateX(1rem);
  background: var(--accent-2);
}

.section {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 6rem 0;
}

.section[id] {
  scroll-margin-top: 6.5rem;
}

.hero-section {
  min-height: calc(100vh - 6rem);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(20rem, 0.8fr);
  gap: 2rem;
  align-items: center;
  padding-top: 4.5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 54rem;
  margin-bottom: 1.25rem;
  font-size: 5.8rem;
  line-height: 0.92;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 45rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.35rem;
  line-height: 1.65;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-panel,
.proof-strip,
.cv-section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-panel {
  padding: 1.25rem;
}

.portrait-row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.25rem;
  align-items: center;
}

.portrait {
  aspect-ratio: 1;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  object-fit: cover;
  background: var(--surface-solid);
}

.panel-label,
.project-kicker,
.repo-card span,
.skill-card span,
.contact-card span {
  margin: 0 0 0.65rem;
  color: var(--accent-3);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.hero-panel h2 {
  margin: 0;
  font-size: 1.9rem;
  line-height: 1.08;
  letter-spacing: 0;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.signal-grid div,
.project-card,
.repo-card,
.skill-card,
.timeline-item,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-solid) 82%, transparent);
}

.signal-grid div {
  padding: 1rem;
}

.signal-grid span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-size: 1.4rem;
  font-weight: 900;
}

.signal-grid small {
  color: var(--muted);
  font-weight: 700;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  padding: 0;
}

.proof-strip div {
  padding: 1.25rem;
  background: color-mix(in srgb, var(--surface-solid) 82%, transparent);
}

.proof-strip span {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.proof-strip strong {
  font-size: 1rem;
  line-height: 1.45;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 0.36fr) minmax(0, 0.64fr);
  gap: 2rem;
  align-items: start;
}

.section-heading {
  position: sticky;
  top: 7rem;
}

.section-heading h2,
.cv-copy h2 {
  margin: 0 0 1rem;
  font-size: 3.35rem;
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}

.section-heading p,
.cv-copy p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.project-grid,
.case-grid,
.repo-grid,
.skill-grid,
.contact-grid {
  display: grid;
  gap: 1rem;
}

.project-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-card {
  min-height: 23rem;
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  overflow: hidden;
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.08);
}

.project-card.featured {
  grid-column: span 2;
  min-height: 19rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 16%, transparent), transparent),
    color-mix(in srgb, var(--surface-solid) 88%, transparent);
}

.project-card h3,
.repo-card h3,
.skill-card h3,
.timeline-item h3 {
  margin: 0 0 0.75rem;
  font-size: 1.45rem;
  line-height: 1.1;
  letter-spacing: 0;
}

.project-card p,
.repo-card p,
.skill-card p,
.timeline-item p {
  color: var(--muted);
  line-height: 1.65;
}

.project-impact {
  margin-top: auto;
  padding-top: 1.25rem;
  color: var(--ink);
  font-weight: 800;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.tag-row span,
.project-meta span {
  min-height: 2rem;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 0.6rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  background: color-mix(in srgb, var(--surface-solid) 76%, transparent);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.project-actions,
.repo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.project-actions a,
.repo-actions a {
  min-height: 2.45rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0 0.8rem;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 900;
  text-decoration: none;
}

.project-actions a:hover,
.repo-actions a:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.case-study-section .section-heading {
  position: static;
  max-width: 52rem;
}

.case-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.case-card {
  display: flex;
  min-height: 31rem;
  flex-direction: column;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-solid) 84%, transparent);
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.08);
}

.case-card.feature-case {
  grid-column: span 2;
  min-height: 28rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent),
    color-mix(in srgb, var(--surface-solid) 88%, transparent);
}

.case-header span,
.case-footer span {
  color: var(--accent-3);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.case-header h3 {
  margin: 0 0 0.8rem;
  font-size: 2rem;
  line-height: 1.05;
  letter-spacing: 0;
}

.case-header p,
.case-body p,
.case-points {
  color: var(--muted);
  line-height: 1.65;
}

.case-body {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

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

.case-body h4 {
  margin: 0 0 0.45rem;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 900;
}

.case-points {
  margin: 0;
  padding-left: 1rem;
}

.case-points li + li {
  margin-top: 0.55rem;
}

.case-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 1.25rem;
}

.case-footer span,
.case-footer a {
  min-height: 2rem;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 0.6rem;
  background: color-mix(in srgb, var(--surface-solid) 76%, transparent);
  text-decoration: none;
}

.case-footer a {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 900;
}

.case-footer a:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.github-section .section-heading {
  position: static;
  max-width: 48rem;
}

.repo-toolbar {
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.repo-filter {
  border: 1px solid var(--line);
  background: var(--surface);
  cursor: pointer;
}

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

.repo-card {
  min-height: 13.5rem;
  display: flex;
  flex-direction: column;
  padding: 1rem;
}

.repo-card p {
  margin-bottom: 0;
}

.repo-card .repo-actions {
  margin-top: auto;
  padding-top: 1rem;
}

.skill-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.skill-card {
  padding: 1.25rem;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1rem;
  padding: 1.25rem;
}

.timeline-item time {
  color: var(--accent);
  font-weight: 900;
}

.cv-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem;
}

.cv-copy {
  max-width: 46rem;
}

.contact-section {
  padding-bottom: 4rem;
}

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

.contact-card {
  min-height: 9rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  text-decoration: none;
}

.contact-card strong {
  overflow-wrap: anywhere;
  font-size: 1.05rem;
}

.site-footer {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: reveal 600ms cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.delay-1 {
  animation-delay: 100ms;
}

.delay-2 {
  animation-delay: 180ms;
}

.delay-3 {
  animation-delay: 260ms;
}

@keyframes reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 980px) {
  .brand-copy small,
  .nav-links {
    display: none;
  }

  h1 {
    font-size: 4.2rem;
  }

  .hero-section,
  .section-grid,
  .cv-section {
    grid-template-columns: 1fr;
  }

  .section-heading {
    position: static;
  }

  .repo-grid,
  .contact-grid,
  .case-grid,
  .proof-strip {
    grid-template-columns: 1fr;
  }

  .case-card.feature-case {
    grid-column: auto;
  }

  .feature-case .case-body {
    grid-template-columns: 1fr;
  }

  .cv-section {
    display: grid;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 0.5rem;
  }

  .nav-shell {
    width: 100%;
    min-height: auto;
  }

  .brand-copy {
    display: none;
  }

  .nav-button {
    display: none;
  }

  .section {
    width: min(100% - 1rem, var(--max));
    padding: 4rem 0;
  }

  .hero-section {
    padding-top: 3rem;
  }

  h1 {
    font-size: 3.2rem;
    line-height: 0.98;
  }

  .hero-lede {
    font-size: 1.08rem;
  }

  .section-heading h2,
  .cv-copy h2 {
    font-size: 2.35rem;
    line-height: 1.08;
  }

  .portrait-row,
  .project-grid,
  .case-grid,
  .skill-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .portrait {
    width: 8rem;
  }

  .project-card.featured {
    grid-column: auto;
  }

  .signal-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}