:root {
  color-scheme: dark;
  --bg: #070b12;
  --surface: #0f1729;
  --surface-alt: #111c33;
  --surface-card: rgba(18, 28, 48, 0.8);
  --border: rgba(90, 215, 255, 0.18);
  --text-primary: #e6edf7;
  --text-secondary: #8ca1c2;
  --text-tertiary: #5c6a85;
  --accent: #5ad7ff;
  --accent-strong: #00c4ff;
  --accent-soft: rgba(90, 215, 255, 0.14);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --container: min(1120px, 90vw);
  --transition: 160ms ease;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: radial-gradient(circle at top, rgba(0, 196, 255, 0.12), transparent 45%) var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 64px;
}

.background-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.04) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle, rgba(0, 0, 0, 0.9) 0%, transparent 80%);
  z-index: 0;
}

.site-header,
main,
.site-footer {
  width: var(--container);
  position: relative;
  z-index: 1;
}

.site-header {
  margin-top: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  background: linear-gradient(135deg, rgba(17, 26, 44, 0.88), rgba(10, 16, 28, 0.88));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-initial {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), rgba(0, 196, 255, 0.2));
  color: var(--bg);
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--accent);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(90, 215, 255, 0.08);
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  cursor: pointer;
  transition: background var(--transition), border var(--transition), color var(--transition);
}

.lang-toggle-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lang-toggle-current {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(90, 215, 255, 0.16);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
}

.lang-toggle:hover,
.lang-toggle:focus-visible {
  background: rgba(90, 215, 255, 0.16);
  border: 1px solid var(--accent);
  color: var(--accent);
}

.hero {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px;
  align-items: stretch;
}

.hero-content {
  padding: 40px;
  background: linear-gradient(145deg, rgba(22, 32, 52, 0.92), rgba(12, 20, 34, 0.92));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-eyebrow {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-title {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  font-weight: 600;
  margin: 0;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin: 0;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: var(--bg);
  box-shadow: 0 12px 30px rgba(0, 196, 255, 0.35);
}

.button.primary:hover,
.button.primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(0, 196, 255, 0.4);
}

.button.ghost {
  border: 1px solid rgba(90, 215, 255, 0.5);
  color: var(--accent);
}

.button.ghost:hover,
.button.ghost:focus-visible {
  background: rgba(90, 215, 255, 0.12);
}

.hero-visual {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(12, 18, 32, 0.86), rgba(22, 32, 52, 0.86));
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 36px;
}

.terminal-card {
  width: 100%;
  background: #05080f;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(90, 215, 255, 0.1);
  box-shadow: inset 0 0 0 1px rgba(90, 215, 255, 0.04);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(12, 18, 32, 0.8);
}

.terminal-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  opacity: 0.7;
}

.terminal-header .red {
  background: #ff5f56;
}

.terminal-header .yellow {
  background: #ffbd2e;
}

.terminal-header .green {
  background: #27c93f;
}

.terminal-body {
  margin: 0;
  padding: 24px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #c9d6f0;
  white-space: pre-wrap;
}

.section {
  margin-top: 96px;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: sticky;
  top: 120px;
}

.section-eyebrow {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-heading h2 {
  margin: 0;
  font-size: 1.8rem;
}

.section-content {
  display: grid;
  gap: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.chip-list li {
  padding: 10px 16px;
  background: rgba(90, 215, 255, 0.08);
  border: 1px solid rgba(90, 215, 255, 0.1);
  border-radius: 999px;
  color: var(--text-primary);
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.project-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.project-card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), border var(--transition), background var(--transition);
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(90, 215, 255, 0.18), transparent 55%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(90, 215, 255, 0.5);
}

.project-card:hover::before {
  opacity: 1;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-family: "JetBrains Mono", "Fira Code", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-title {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.project-description {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.project-tag {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(90, 215, 255, 0.2);
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: "JetBrains Mono", "Fira Code", monospace;
}

.project-links {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: auto;
}

.project-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

.project-link span {
  transition: transform var(--transition);
}

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

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

.contact-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(16, 23, 41, 0.7);
  text-decoration: none;
  color: inherit;
  transition: border var(--transition), background var(--transition), transform var(--transition);
}

.contact-card:hover,
.contact-card:focus {
  border-color: rgba(90, 215, 255, 0.5);
  background: rgba(16, 23, 41, 0.85);
  transform: translateY(-2px);
}

.contact-label {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
}

.contact-value {
  font-size: 1.05rem;
  color: var(--text-primary);
}

.site-footer {
  margin: 48px 0 64px;
  padding: 24px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: rgba(10, 17, 31, 0.85);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.9rem;
  backdrop-filter: blur(18px);
}

.footer-easter-egg {
  color: inherit;
  text-decoration: none;
  opacity: 1;
  transition: opacity var(--transition);
}

.footer-easter-egg:hover,
.footer-easter-egg:focus-visible {
  opacity: 1;
}

@media (max-width: 1024px) {
  .site-header {
    flex-wrap: wrap;
    gap: 16px;
  }

  .site-nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

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

  .section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section-heading {
    position: static;
  }
}

@media (max-width: 720px) {
  body {
    gap: 48px;
  }

  .site-header {
    margin-top: 32px;
    padding: 18px 20px;
  }

  .hero-content {
    padding: 28px;
  }

  .terminal-body {
    font-size: 0.78rem;
  }

  .section {
    margin-top: 72px;
  }
}

@media (max-width: 520px) {
  .site-header {
    border-radius: var(--radius-md);
  }

  .hero-content {
    border-radius: var(--radius-md);
  }

  .hero-cta {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

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