* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-dark: #0a0a0f;
  --bg-elevated: #12121a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a8;
  --text-tertiary: #606068;
  --border: rgba(255, 255, 255, 0.06);

  /* Cross-page accent normalization (case studies use different token names) */
  --accent-primary: var(
    --accent-cyan,
    var(
      --accent-blue-bright,
      var(--accent-purple-bright, var(--accent-magenta, var(--accent-red, #00d9ff)))
    )
  );
  --accent-primary-dim: var(
    --accent-cyan-dim,
    var(--accent-blue, var(--accent-purple-dim, var(--accent-magenta, var(--accent-red, #00a8cc))))
  );

  /* Sensible default + dynamic (when supported) */
  --border-hover: rgba(0, 217, 255, 0.3);
  --border-hover: color-mix(in srgb, var(--accent-primary) 35%, transparent);
}

html, body {
  background: #0a0a0f;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

nav {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1.25rem 6%;
  background: rgba(10, 10, 15, 0.8);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-decoration: none;
  transition: transform 0.2s ease;
}

.logo-icon {
  width: 30px;
  height: 30px;
  display: block;
  object-fit: contain;
}

.logo-text {
  margin-left: 0.75rem;
  font-size: 0.938rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  align-items: center;
  margin: 0;
  padding: 0;
}

.nav-links li {
  margin: 0;
  padding: 0;
}

.nav-links a {
  line-height: 1.6;
}

.nav-links a {
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: -0.01em;
  position: relative;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-primary);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.8);
}

.nav-toggle-icon {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  nav {
    transform: none !important;
    transition: none !important;
  }

  .nav-container {
    flex-wrap: nowrap;
    gap: 0.75rem;
  }

  .logo {
    flex: 1 1 auto;
  }

  .logo-text {
    margin-left: 0.5rem;
    font-size: 0.875rem;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    flex-direction: column;
    gap: 1rem;
    min-width: 200px;
    display: none;
    align-items: center;
    text-align: center;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
  }

  .resume-btn svg {
    display: none;
  }

  .resume-btn::after {
    display: none;
  }
}

@media (max-width: 480px) {
  .logo-text {
    display: none;
  }
}

.nav-links .back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.nav-links .back-link svg {
  width: 16px;
  height: 16px;
}

.back-link {
  font-size: 0.938rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.resume-btn {
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: -0.01em;
  position: relative;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.resume-btn::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.3s ease;
}

.resume-btn:hover::after {
  width: calc(100% - 20px);
}

.resume-btn svg {
  width: 14px;
  height: 14px;
  opacity: 0;
  transform: translateY(2px);
  transition: all 0.25s ease;
}

.resume-btn:hover svg {
  opacity: 1;
  transform: translateY(0);
}

/* Keyboard focus */
:where(a, button):focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Prefer left-aligned copy on the web (avoid justification “rivers”) */
:where(p, li)[style*="text-align: justify"] {
  text-align: left !important;
  text-justify: auto !important;
}

/* Case study TL;DR block */
.tldr-section {
  padding: 2.5rem 6% 2.25rem;
}

.hero + .tldr-section {
  padding-top: 0;
}

.tldr-card {
  max-width: 1100px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem 1.75rem 1.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.22);
}

.tldr-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.tldr-title h2 {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin: 0;
}

.tldr-title p {
  margin: 0;
  font-size: 0.938rem;
  color: var(--text-tertiary);
}

.tldr-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}

.tldr-item {
  padding: 0.75rem 0.75rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
}

.tldr-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}

.tldr-value {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0;
}

@media (max-width: 980px) {
  .tldr-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .tldr-section {
    padding: 2rem 5% 1.75rem;
  }

  .hero + .tldr-section {
    padding-top: 0;
  }

  .tldr-card {
    padding: 1.25rem;
  }

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

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