:root {
  --bg-base: #08090c;
  --bg-surface: #0e1219;
  --bg-card: #131822;
  --bg-card-hover: #18202d;
  --border-subtle: #1c2536;
  --border-active: #2d7ff9;
  --accent-blue: #2d7ff9;
  --accent-blue-glow: rgba(45, 127, 249, 0.15);
  --accent-green: #00e599;
  --accent-green-glow: rgba(0, 229, 153, 0.15);
  --accent-amber: #f59e0b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --font-sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html, body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

button,
input {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--text-primary);
  color: var(--bg-base);
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform 0.15s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.nav-section-link {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.nav-section-link:hover {
  color: var(--text-primary);
}

code, pre, .mono {
  font-family: var(--font-mono);
}

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

h1, h2, h3 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Technical grid background */
.bg-grid {
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(28, 37, 54, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 37, 54, 0.35) 1px, transparent 1px);
}

/* Glow highlights */
.glow-box {
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.glow-box:hover {
  border-color: var(--border-active);
  box-shadow: 0 0 24px var(--accent-blue-glow);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-blue {
  background: rgba(45, 127, 249, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(45, 127, 249, 0.3);
}

.badge-green {
  background: rgba(0, 229, 153, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(0, 229, 153, 0.3);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-muted {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* Section headings */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-alt {
  background: var(--bg-surface);
}

.section-head {
  margin-bottom: 40px;
  max-width: 720px;
}

.section-head .badge {
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(26px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
}

.section-head p {
  color: var(--text-secondary);
  margin-top: 10px;
}

.section-head a,
.prose-link {
  color: var(--accent-blue);
  border-bottom: 1px solid rgba(45, 127, 249, 0.35);
}

.section-head a:hover,
.prose-link:hover {
  border-bottom-color: var(--accent-blue);
}

/* Card grids never force horizontal scroll on narrow phones */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 20px;
}

/* Data table: real table on wide screens, stacked cards on phones */
.data-table-wrap {
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  background: var(--bg-base);
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.data-table th {
  padding: 12px 20px;
  background: rgba(14, 18, 25, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.data-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: top;
  color: var(--text-secondary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table td:first-child {
  color: var(--text-primary);
  font-weight: 600;
}

.data-table code {
  display: inline-block;
  font-size: 12px;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 3px 8px;
  overflow-wrap: anywhere;
}

@media (max-width: 720px) {
  .data-table thead {
    display: none;
  }

  .data-table,
  .data-table tbody,
  .data-table tr,
  .data-table td {
    display: block;
    width: 100%;
  }

  .data-table tr {
    padding: 16px;
    border-bottom: 1px solid var(--border-subtle);
  }

  .data-table tr:last-child {
    border-bottom: none;
  }

  .data-table td {
    padding: 4px 0;
    border: none;
  }

  .data-table td[data-label]::before {
    content: attr(data-label);
    display: block;
    margin-top: 8px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
  }
}

/* Custom scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

@media (max-width: 820px) {
  .nav-section-link {
    display: none;
  }

  .site-nav {
    gap: 8px !important;
  }

  .install-method-heading {
    align-items: flex-start !important;
    flex-direction: column;
    gap: 6px;
  }

  .install-command,
  .install-method-command {
    align-items: stretch !important;
    flex-direction: column !important;
    gap: 12px;
  }

  .install-command > div,
  .install-method-command > span {
    white-space: normal !important;
    overflow-wrap: anywhere;
  }

  .install-command button,
  .install-method-command button {
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }

  .responsive-card-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  section {
    scroll-margin-top: 74px;
  }

  .brand-copy span:last-child {
    display: none;
  }

  .terminal-status {
    display: none;
  }

  .terminal-title {
    display: inline-block;
    max-width: 210px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

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

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

/* Blog */
.blog-wrap {
  max-width: 760px;
  padding-top: 56px;
  padding-bottom: 80px;
}

.blog-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-green);
  margin: 0 0 12px;
}

.blog-title {
  font-family: var(--font-sans);
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0 0 16px;
}

.blog-standfirst {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 40px;
}

.blog-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 8px;
}

.blog-byline {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 28px;
}

.blog-byline a {
  color: var(--accent-blue);
  text-decoration: none;
}

.blog-byline a:hover {
  text-decoration: underline;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.blog-card:hover {
  border-color: var(--border-active);
}

.blog-card-title {
  font-size: 24px;
  margin: 0 0 12px;
}

.blog-card-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.blog-card-title a:hover {
  color: var(--accent-blue);
}

.blog-excerpt {
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0 0 20px;
}

.blog-read-more {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-green);
  text-decoration: none;
}

.blog-read-more:hover {
  text-decoration: underline;
}

.blog-crumb {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.blog-crumb a {
  color: var(--accent-blue);
  text-decoration: none;
}

.blog-wrap article p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0 0 20px;
}

.blog-wrap article p.lead {
  font-size: 19px;
  color: var(--text-primary);
  line-height: 1.65;
}

.blog-wrap article h2 {
  font-size: 26px;
  color: var(--text-primary);
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}

.blog-wrap article strong {
  color: var(--text-primary);
}

.blog-wrap article blockquote {
  border-left: 3px solid var(--accent-green);
  margin: 24px 0;
  padding: 4px 0 4px 20px;
  font-size: 19px;
  font-style: italic;
  color: var(--text-primary);
}

.pdf-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(45, 127, 249, 0.08) 0%, rgba(0, 229, 153, 0.06) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
}

.pdf-callout-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pdf-callout-sub {
  font-size: 14px;
  color: var(--text-muted);
}

.pdf-button {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: #04120c;
  background: var(--accent-green);
  border-radius: 8px;
  padding: 12px 20px;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 0 16px var(--accent-green-glow);
}

.pdf-button:hover {
  filter: brightness(1.1);
}

@media (max-width: 640px) {
  .blog-title {
    font-size: 30px;
  }

  .pdf-callout {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Theory illustrations: one visual system for all hand-built SVG figures */
.theory-fig {
  margin: 36px 0;
  background: linear-gradient(160deg, rgba(45, 127, 249, 0.05), rgba(0, 229, 153, 0.03)), var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 26px 26px 22px;
}

.theory-fig .fig-kicker {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 18px;
}

.theory-fig .fig-kicker .fig-kind {
  color: var(--text-muted);
}

.theory-fig svg {
  width: 100%;
  height: auto;
  display: block;
}

.theory-fig figcaption {
  margin-top: 18px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-secondary);
}

.theory-fig figcaption strong {
  color: var(--text-primary);
}

@media (max-width: 640px) {
  .theory-fig {
    padding: 18px 14px 16px;
  }
}