:root {
  color-scheme: light dark;
  --bg: #f8f9fb;
  --bg-elevated: #ffffff;
  --bg-subtle: #eef1f7;
  --text: #12151c;
  --text-muted: #495060;
  --accent: #3555ff;
  --accent-strong: #1f3ef5;
  --border: rgba(18, 21, 28, 0.08);
  --shadow: 0 24px 48px rgba(18, 21, 28, 0.08);
  --eyebrow: #7b84a0;
}

.dark {
  --bg: #0f1117;
  --bg-elevated: #161823;
  --bg-subtle: #1d202d;
  --text: #f7f8fc;
  --text-muted: #b5bad1;
  --accent: #6188ff;
  --accent-strong: #7ba0ff;
  --border: rgba(98, 112, 168, 0.25);
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
  --eyebrow: #7882a3;
}

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

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background-color: var(--bg);
  color: var(--text);
  letter-spacing: -0.01em;
  transition: background-color 0.4s ease, color 0.4s ease;
}

h1,
h2,
h3 {
  font-family: "Playfair Display", "Times New Roman", serif;
  margin: 0;
  color: var(--text);
}

p {
  margin: 0;
  line-height: 1.7;
  color: var(--text-muted);
}

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

ul {
  padding-left: 1.1rem;
  margin: 0.75rem 0 0;
  color: var(--text-muted);
}

li + li {
  margin-top: 0.35rem;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background-color: rgba(248, 249, 251, 0.8);
  border-bottom: 1px solid var(--border);
}

.dark .site-header {
  background-color: rgba(16, 18, 26, 0.85);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.95rem;
}

.nav-links a {
  position: relative;
  padding: 0.4rem 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease,
    transform 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
}

.theme-toggle .sun {
  display: inline-block;
}

.theme-toggle .moon {
  display: none;
}

.dark .theme-toggle .sun {
  display: none;
}

.dark .theme-toggle .moon {
  display: inline-block;
}

.hero {
  padding: 6rem 0 4rem;
}

.hero-content {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--eyebrow);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.8rem, 5vw, 3.6rem);
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease,
    border-color 0.2s ease;
}

.btn.primary {
  background: var(--accent);
  color: #f4f6ff;
  box-shadow: var(--shadow);
}

.btn.primary:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

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

.btn.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.social-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.hero-card {
  background: var(--bg-elevated);
  border-radius: 28px;
  padding: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.card-header {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online {
  background: #4cd964;
  box-shadow: 0 0 0 4px rgba(76, 217, 100, 0.25);
}

.quick-facts {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.quick-facts div {
  display: grid;
  gap: 0.3rem;
}

.quick-facts dt {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--eyebrow);
}

.quick-facts dd {
  margin: 0;
  color: var(--text);
  font-weight: 500;
}

.section {
  padding: 5rem 0;
}

.section-heading {
  display: grid;
  gap: 1rem;
  max-width: 640px;
  margin-bottom: 3rem;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem;
}

.about-card {
  background: var(--bg-elevated);
  border-radius: 24px;
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.75rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-elevated);
  border-radius: 24px;
  padding: 2.25rem;
  border: 1px solid var(--border);
  display: grid;
  gap: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.project-type {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--eyebrow);
}

.project-link {
  font-weight: 600;
  color: var(--accent);
}

.project-link:hover {
  color: var(--accent-strong);
}

.experience .timeline {
  position: relative;
  display: grid;
  gap: 2.5rem;
  padding-left: 1.5rem;
  border-left: 2px solid var(--border);
}

.timeline-item {
  position: relative;
  padding-left: 1.5rem;
}

.timeline-marker {
  position: absolute;
  left: -2.35rem;
  top: 0.35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(53, 85, 255, 0.18);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--eyebrow);
}

.timeline-content {
  display: grid;
  gap: 0.75rem;
  background: var(--bg-elevated);
  padding: 2rem;
  border-radius: 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.contact-card {
  background: linear-gradient(
      135deg,
      rgba(53, 85, 255, 0.12),
      rgba(53, 85, 255, 0)
    ),
    var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  box-shadow: var(--shadow);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-card {
    order: -1;
  }

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

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

@media (max-width: 768px) {
  .site-header {
    position: static;
    backdrop-filter: none;
  }

  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .hero {
    padding-top: 4rem;
  }

  .section {
    padding: 4rem 0;
  }

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

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

@media (max-width: 520px) {
  .container {
    padding: 0 1.25rem;
  }

  .nav-container {
    flex-direction: column;
    gap: 0.75rem;
    height: auto;
    padding: 1.25rem 0;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .hero-card,
  .about-card,
  .project-card,
  .timeline-content {
    padding: 1.75rem;
  }

  .contact-card {
    padding: 2.25rem;
  }
}