/* ── Design tokens ───────────────────────────────────────────── */
:root {
  --bg: #0b0f14;
  --bg-alt: #111820;
  --bg-card: #151d28;
  --bg-card-hover: #1a2433;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e8edf4;
  --text-muted: #8b9cb3;
  --text-faint: #5c6d82;
  --accent: #3d9bff;
  --accent-soft: rgba(61, 155, 255, 0.12);
  --accent-glow: rgba(61, 155, 255, 0.25);
  --warm: #e8a54b;
  --warm-soft: rgba(232, 165, 75, 0.12);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "DM Sans", system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
  --header-h: 4rem;
  --container: min(1120px, calc(100% - 2rem));
  --transition: 0.2s ease;
}

/* ── Reset & base ────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

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

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

a:hover {
  color: #6bb3ff;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, p {
  margin: 0;
}

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* ── Utilities ───────────────────────────────────────────────── */
.container {
  width: var(--container);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 0.75rem;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section-header {
  max-width: 36rem;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}

.section-lead {
  color: var(--text-muted);
  font-size: 1.0625rem;
}

/* ── Header ──────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.0625rem;
}

.logo:hover {
  color: var(--text);
}

.logo-img {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  object-fit: contain;
}

.logo-img-sm {
  width: 1.75rem;
  height: 1.75rem;
}

.logo-text abbr {
  text-decoration: none;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  color: var(--text);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  margin-inline: auto;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-list {
  display: flex;
  gap: 0.25rem;
}

.nav-list a {
  display: block;
  padding: 0.5rem 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

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

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(4rem, 10vw, 7rem);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
  align-items: start;
}

.hero-content h1 {
  font-family: var(--serif);
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.hero-content h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-lead {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-muted);
  max-width: 34rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 10px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #2d8ef5;
  color: #fff;
}

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

.btn-ghost:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--text);
}

.hero-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.5rem;
}

.card-title {
  font-size: 1.375rem;
  margin-bottom: 0.25rem;
}

.card-org {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
}

.card-org-sub {
  color: var(--text-faint);
  font-size: 0.875rem;
}

.card-meta {
  font-size: 0.875rem;
  color: var(--text-faint);
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-tags li {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.hero-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* ── About ───────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}

.about-prose p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.0625rem;
}

.about-prose a {
  color: var(--text);
  text-decoration: underline;
}

.about-quote {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--warm);
  background: var(--warm-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.about-quote p {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.highlight-card {
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.highlight-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.375rem;
}

.highlight-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.education-block {
  margin-bottom: 3rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.education-degree {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.education-school {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* ── Services ────────────────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.service-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.service-icon {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.625rem;
}

.service-card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* ── Work / Timeline ─────────────────────────────────────────── */
.timeline {
  position: relative;
  margin-bottom: 3.5rem;
  padding-left: 1.5rem;
  border-left: 2px solid var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: calc(-1.5rem - 5px);
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.timeline-body time {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-faint);
  margin-bottom: 0.375rem;
}

.timeline-body h3 {
  font-size: 1.125rem;
  margin-bottom: 0.375rem;
}

.timeline-body p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 40rem;
}

.projects-subheading {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.projects-grid + .projects-subheading {
  margin-top: 3.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  color: inherit;
}

.project-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.625rem;
}

.project-title {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-width: 0;
}

.project-logo {
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
  object-fit: contain;
}

.project-logo--wide {
  width: auto;
  max-width: 5.5rem;
  height: 1.375rem;
}

.project-top h4 {
  font-size: 1rem;
}

.project-stars,
.project-tag {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--warm);
  white-space: nowrap;
}

.project-card p {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.project-lang {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.article-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  color: inherit;
}

.article-meta {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 0.625rem;
}

.article-title {
  font-size: 1.0625rem;
  line-height: 1.35;
  margin-bottom: 0.625rem;
}

.article-desc {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.article-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

/* ── Contact ─────────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-intro p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
}

.contact-email {
  display: inline-block;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
  text-align: left;
}

.contact-email:hover {
  text-decoration: underline;
}

.contact-email-fallback {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
}

.social-links {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 0.75rem;
}

.social-card {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  height: 100%;
  min-height: 6.5rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-align: left;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition);
}

.social-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--text);
}

.social-card svg {
  width: 1.5rem;
  height: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.social-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.social-handle {
  margin-top: auto;
  font-size: 0.8125rem;
  color: var(--text-faint);
  line-height: 1.4;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  min-height: 2.25rem;
  word-break: break-all;
}

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.footer-org {
  font-size: 0.8125rem;
  color: var(--text-faint);
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-faint);
}

.footer-top {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-top:hover {
  color: var(--accent);
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-card {
    max-width: 24rem;
  }

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

  .about-highlights {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .highlight-card {
    flex: 1;
    min-width: 140px;
  }

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

  .projects-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .social-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .social-card {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(11, 15, 20, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: 0.25rem;
  }

  .nav-list a {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .services-grid,
  .projects-grid,
  .articles-grid,
  .social-links {
    grid-template-columns: 1fr;
  }

  .social-card {
    grid-column: auto;
    min-height: 0;
  }

  .about-highlights {
    flex-direction: column;
  }

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

/* ── Reduced motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}