:root {
  --font-heading: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --accent: #7c3aed;
  --accent-soft: rgba(124, 58, 237, 0.12);
  --bg: #f9fafb;
  --bg-elevated: rgba(255, 255, 255, 0.85);
  --surface: rgba(255, 255, 255, 0.7);
  --surface-solid: #ffffff;
  --text: #0f172a;
  --text-inverse: #f8fafc;
  --muted: #64748b;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
  --radius-sm: 0.75rem;
  --radius-md: 1.25rem;
  --radius-lg: 2rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0b1120;
  --bg-elevated: rgba(15, 23, 42, 0.92);
  --surface: rgba(15, 23, 42, 0.75);
  --surface-solid: #111827;
  --text: #e2e8f0;
  --text-inverse: #0f172a;
  --muted: #94a3b8;
  --border: rgba(226, 232, 240, 0.1);
  --shadow: 0 24px 48px rgba(8, 15, 37, 0.35);
  color-scheme: dark;
}

html[data-theme="auto"] {
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] {
    --bg: #0b1120;
    --bg-elevated: rgba(15, 23, 42, 0.92);
    --surface: rgba(15, 23, 42, 0.75);
    --surface-solid: #111827;
    --text: #e2e8f0;
    --text-inverse: #0f172a;
    --muted: #94a3b8;
    --border: rgba(226, 232, 240, 0.12);
    --shadow: 0 26px 52px rgba(8, 15, 37, 0.4);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 100%;
  height: 0.125rem;
  background: linear-gradient(90deg, var(--accent), rgba(124, 58, 237, 0.4));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

a:focus-visible,
a:hover {
  color: var(--accent);
}

a:focus-visible::after,
a:hover::after {
  transform: scaleX(1);
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

main {
  display: block;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.section {
  padding: var(--space-xl) 0;
}

.section__heading {
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: var(--text);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

h1 {
  font-size: clamp(2.65rem, 4vw, 3.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 3vw, 2.5rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  font-weight: 600;
}

p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

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

.pill-group {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: 0;
  margin: var(--space-sm) 0 0;
}

.pill {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
}

.btn {
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
  border: 1px solid transparent;
}

.btn--primary {
  color: var(--text-inverse);
  background: var(--accent);
  box-shadow: 0 12px 24px rgba(124, 58, 237, 0.3);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(124, 58, 237, 0.38);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.skip-link {
  position: absolute;
  top: -4rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--text-inverse);
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  z-index: 999;
}

.skip-link:focus-visible {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  backdrop-filter: blur(14px);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 1rem 0;
  gap: var(--space-sm);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand__link::after {
  display: none;
}

.nav__links {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  align-items: center;
  margin: 0;
  padding: 0;
}

.nav__links a {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
  transition: border-color 150ms ease, transform 150ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.theme-toggle__icon {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--accent) 0, transparent 65%);
}

.theme-toggle__text {
  font-weight: 600;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--space-xl) * 1.2) 0 var(--space-xl);
}

.hero__content {
  display: grid;
  gap: var(--space-md);
  position: relative;
}

.hero__eyebrow {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero__subtext {
  max-width: 600px;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero__accent {
  position: absolute;
  inset: auto -15% -40% 50%;
  width: 420px;
  aspect-ratio: 1/1;
  background: radial-gradient(circle at center, rgba(124, 58, 237, 0.4), transparent 65%);
  filter: blur(60px);
  opacity: 0.8;
  pointer-events: none;
}

[data-animate] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 420ms ease, transform 420ms ease;
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-animate],
  [data-animate].is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.projects-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
  transition: transform 220ms ease, box-shadow 220ms ease;
  display: grid;
}

.project-card img {
  height: 180px;
  object-fit: cover;
  border-radius: 0;
}

.project-card__body {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-md);
}

.project-card:hover,
.project-card:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 30px 60px rgba(124, 58, 237, 0.22);
}

.project-card__link {
  font-weight: 600;
  color: var(--accent);
  margin-top: var(--space-xs);
}

.section--highlight {
  background: linear-gradient(120deg, rgba(124, 58, 237, 0.08), transparent);
  padding: var(--space-lg) 0;
}

.highlight-strip {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.highlight-strip__item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
}

.highlight-strip__item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(124, 58, 237, 0.18), transparent 70%);
  opacity: 0;
  transition: opacity 220ms ease;
}

.highlight-strip__item:hover::before,
.highlight-strip__item:focus-within::before {
  opacity: 1;
}

.writing-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-sm);
}

.writing-list li {
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-sm);
}

.writing-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-weight: 500;
  gap: var(--space-sm);
}

.writing-list__title {
  font-size: 1.05rem;
}

.about {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.about__visual {
  position: relative;
  justify-self: center;
  max-width: 240px;
}

.about__visual img {
  border-radius: 28px;
  border: 2px solid var(--border);
}

.about__glow {
  position: absolute;
  inset: -12% -20% 20% -20%;
  background: radial-gradient(circle at 40% 20%, rgba(124, 58, 237, 0.28), transparent 65%);
  filter: blur(40px);
  z-index: -1;
}

.about__values {
  margin-top: var(--space-md);
}

.contact {
  display: grid;
  gap: var(--space-md);
}

.social-links {
  list-style: none;
  display: flex;
  gap: var(--space-sm);
  padding: 0;
  margin: 0;
}

.social-links svg {
  width: 1.4rem;
  height: 1.4rem;
  fill: currentColor;
}

.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--space-md) 0;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.footer__nav {
  list-style: none;
  display: flex;
  gap: var(--space-sm);
  padding: 0;
  margin: 0;
}

.footer__nav a {
  font-size: 0.9rem;
}

.back-to-top {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

@media (max-width: 768px) {
  .nav {
    flex-wrap: wrap;
  }

  .nav__links {
    width: 100%;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .hero__content {
    text-align: left;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 540px) {
  .nav__links {
    justify-content: center;
  }

  .hero__actions {
    width: 100%;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  .footer__inner {
    align-items: center;
  }

  .footer__nav {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@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;
  }

  a::after,
  .project-card,
  .highlight-strip__item::before,
  [data-animate] {
    transition: none !important;
  }

  [data-animate] {
    opacity: 1 !important;
    transform: none !important;
  }
}