:root {
  --bg: #faf9f7;
  --bg-elevated: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --border: rgba(26, 26, 26, 0.1);
  --border-strong: rgba(26, 26, 26, 0.2);
  --accent: #1a1a1a;
  --radius: 10px;
  --font-serif: "Instrument Serif", Georgia, serif;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: 3rem;
  --space-xl: 5.5rem;
  --max: 880px;
  --max-narrow: 680px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--text);
  color: var(--bg);
  z-index: 100;
  border-radius: 6px;
}

.skip-link:focus {
  left: 0.75rem;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: 2px;
}

button:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.75rem;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav a {
  position: relative;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.18s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

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

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

@media (max-width: 540px) {
  .site-header {
    padding: 0.85rem 1.25rem;
  }
  .nav ul {
    gap: 1rem;
  }
  .nav a {
    font-size: 0.82rem;
  }
}

/* ---------- Layout ---------- */
main {
  padding: var(--space-xl) 1.75rem var(--space-lg);
}

@media (max-width: 540px) {
  main {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}

.section {
  max-width: var(--max);
  margin: 0 auto var(--space-xl);
}

.section-title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 4vw, 2.4rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.section-lede {
  margin: -1.25rem 0 var(--space-md);
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Hero ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto var(--space-xl);
  padding-top: var(--space-md);
}

.hero-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.hero-title {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-serif);
  font-size: clamp(3rem, 9vw, 5rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1;
}

.hero-name {
  font-style: italic;
}

.hero-role {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  gap: var(--space-lg);
  align-items: start;
}

@media (min-width: 760px) {
  .about-grid {
    grid-template-columns: 1.5fr 1fr;
  }
}

.about-copy p {
  margin: 0 0 var(--space-md);
  font-size: 1.05rem;
  color: var(--text);
}

.facts {
  margin: 0;
  padding: var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.facts div {
  display: grid;
  gap: 0.15rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

.facts div:first-child {
  padding-top: 0;
}

.facts div:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.facts dt {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.facts dd {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 500;
}

.social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.social a {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  font-size: 0.88rem;
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elevated);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.social a:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

/* ---------- Skills ---------- */
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.skill-list li {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: border-color 0.18s ease;
}

.skill-list li:hover {
  border-color: var(--border-strong);
}

/* ---------- Portfolio ---------- */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-md);
}

.filter-btn {
  padding: 0.4rem 0.95rem;
  font-family: inherit;
  font-size: 0.82rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.filter-btn[aria-selected="true"] {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.project-grid {
  display: grid;
  gap: 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 640px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 12px 30px rgba(26, 26, 26, 0.05);
  transform: translateY(-2px);
}

.project-card[data-hidden="true"] {
  display: none;
}

.project-meta {
  margin-bottom: 0.6rem;
}

.project-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.project-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.project-subtitle {
  margin: 0 0 var(--space-sm);
  flex: 1;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.project-links a {
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 1px;
  transition: border-color 0.18s ease;
}

.project-links a:hover {
  border-color: var(--text);
}

.project-links span {
  display: inline-block;
  transition: transform 0.18s ease;
}

.project-links a:hover span {
  transform: translate(2px, -2px);
}

/* ---------- Contact ---------- */
.contact-copy {
  margin: 0 0 var(--space-sm);
  max-width: 48ch;
  color: var(--text-muted);
  font-size: 1.02rem;
}

.contact-email {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
  transition: border-color 0.18s ease;
}

.contact-email:hover {
  border-color: var(--text);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: var(--space-lg) 1.75rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.site-footer p {
  margin: 0;
}