@layer reset, tokens, base, layout, components, utilities;

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

  html {
    min-width: 20rem;
  }

  body,
  h1,
  h2,
  h3,
  p,
  ul,
  ol,
  figure,
  pre {
    margin: 0;
  }

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

@layer tokens {
  :root {
    color-scheme: dark;
    --color-bg: #07111f;
    --color-surface: #0c1929;
    --color-surface-raised: #112137;
    --color-text: #f4f7fb;
    --color-muted: #a8b3c2;
    --color-faint: #728198;
    --color-border: #2b3a4f;
    --color-accent: #5ce1ff;
    --color-accent-ink: #041017;
    --color-good: #7cf2b5;
    --font-body:
      Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
      "Segoe UI", sans-serif;
    --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
    --font-mono:
      "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --space-1: 0.375rem;
    --space-2: 0.625rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4.5rem;
    --radius-sm: 0.55rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --content: 74rem;
    --measure: 68ch;
  }
}

@layer base {
  body {
    min-height: 100svh;
    overflow-wrap: break-word;
    background:
      linear-gradient(rgb(92 225 255 / 0.035) 1px, transparent 1px),
      linear-gradient(90deg, rgb(92 225 255 / 0.035) 1px, transparent 1px),
      var(--color-bg);
    background-size: 5rem 5rem;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
  }

  h1,
  h2,
  h3 {
    color: var(--color-text);
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.08;
    text-wrap: balance;
  }

  h1 {
    max-width: 13ch;
    font-size: clamp(3rem, 9vw, 6.8rem);
    letter-spacing: -0.055em;
  }

  h2 {
    max-width: 22ch;
    font-size: clamp(2rem, 5vw, 3.75rem);
    letter-spacing: -0.04em;
  }

  h3 {
    font-size: clamp(1.2rem, 2.2vw, 1.55rem);
    letter-spacing: -0.02em;
  }

  p,
  li,
  dd {
    text-wrap: pretty;
  }

  a {
    color: var(--color-accent);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.18em;
  }

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

  code:not(pre code) {
    border: 1px solid var(--color-border);
    border-radius: 0.35rem;
    background: var(--color-surface);
    padding: 0.12rem 0.35rem;
    color: #dff9ff;
    font-size: 0.92em;
  }

  pre {
    max-width: 100%;
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #050c16;
    padding: var(--space-4);
    color: #dff9ff;
    font-size: 0.88rem;
    line-height: 1.7;
    tab-size: 2;
  }

  :focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
  }

  :target,
  [tabindex="-1"] {
    scroll-margin-top: 6rem;
  }

  ::selection {
    background: var(--color-accent);
    color: var(--color-accent-ink);
  }
}

@layer layout {
  .shell {
    width: min(100% - 2rem, var(--content));
    margin-inline: auto;
  }

  .site-header {
    position: sticky;
    z-index: 10;
    top: 0;
    border-block-end: 1px solid rgb(43 58 79 / 0.82);
    background: rgb(7 17 31 / 0.92);
    backdrop-filter: blur(14px);
  }

  .site-nav {
    display: flex;
    min-height: 4.5rem;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
  }

  .nav-links,
  .footer-links,
  .button-row,
  .proof-rail,
  .tag-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
  }

  main {
    overflow: clip;
  }

  .hero {
    display: grid;
    min-height: calc(100svh - 4.5rem);
    align-items: center;
    gap: var(--space-6);
    padding-block: var(--space-6);
  }

  .hero-copy {
    display: grid;
    gap: var(--space-4);
  }

  .hero-visual {
    align-self: stretch;
  }

  .section {
    padding-block: var(--space-7);
  }

  .section-heading {
    display: grid;
    max-width: 52rem;
    gap: var(--space-3);
    margin-block-end: var(--space-6);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    display: grid;
    gap: var(--space-3);
  }

  .content-layout {
    display: grid;
    gap: var(--space-6);
  }

  .prose {
    display: grid;
    max-width: var(--measure);
    gap: var(--space-4);
  }

  .prose h2,
  .prose h3 {
    margin-block-start: var(--space-4);
  }

  .prose ul,
  .prose ol {
    display: grid;
    gap: var(--space-2);
    padding-inline-start: 1.35rem;
  }

  .site-footer {
    border-block-start: 1px solid var(--color-border);
    padding-block: var(--space-5);
  }

  .footer-layout {
    display: grid;
    gap: var(--space-4);
  }

  @media (min-width: 48rem) {
    .hero {
      grid-template-columns: minmax(0, 1.12fr) minmax(22rem, 0.88fr);
    }

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

    .grid-3 {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

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

    .content-layout {
      grid-template-columns: minmax(12rem, 0.32fr) minmax(0, 0.68fr);
    }

    .footer-layout {
      grid-template-columns: 1fr auto;
      align-items: end;
    }
  }
}

@layer components {
  .skip-link {
    position: fixed;
    z-index: 100;
    inset-block-start: var(--space-3);
    inset-inline-start: var(--space-3);
    translate: 0 -200%;
    border-radius: var(--radius-sm);
    background: var(--color-accent);
    padding: var(--space-2) var(--space-3);
    color: var(--color-accent-ink);
    font-weight: 800;
  }

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

  .brand {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    gap: 0.7rem;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 1.08rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    text-decoration: none;
  }

  .brand img {
    width: 2.45rem;
    height: 2.45rem;
  }

  .nav-links {
    list-style: none;
    padding: 0;
  }

  .nav-links a,
  .footer-links a {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    color: var(--color-muted);
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
  }

  .eyebrow,
  .label,
  .tag {
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
  }

  .lede {
    max-width: 62ch;
    color: var(--color-muted);
    font-size: clamp(1.05rem, 2vw, 1.3rem);
  }

  .button {
    display: inline-flex;
    min-height: 2.9rem;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.65rem 1.1rem;
    background: var(--color-surface-raised);
    color: var(--color-text);
    font-weight: 800;
    text-decoration: none;
  }

  .button-row-spaced {
    margin-block-start: var(--space-4);
  }

  .button-primary {
    border-color: var(--color-accent);
    background: var(--color-accent);
    color: var(--color-accent-ink);
  }

  .alpha-note,
  .callout {
    border-inline-start: 3px solid var(--color-accent);
    background: rgb(12 25 41 / 0.72);
    padding: var(--space-3) var(--space-4);
    color: var(--color-muted);
  }

  .evidence-ledger {
    display: grid;
    height: 100%;
    min-height: 31rem;
    grid-template-rows: auto 1fr auto;
    gap: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: linear-gradient(155deg, #112137, #091421 75%);
    padding: clamp(1.25rem, 3vw, 2rem);
    box-shadow: 0 1.4rem 4rem rgb(0 0 0 / 0.22);
  }

  .ledger-header,
  .ledger-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 0.78rem;
  }

  .status {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--color-good);
  }

  .status::before {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: currentColor;
    content: "";
  }

  .flow {
    display: grid;
    align-content: center;
    gap: var(--space-3);
  }

  .flow-lanes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .flow-node {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #07111f;
    padding: var(--space-3);
  }

  .flow-node strong,
  .flow-node span {
    display: block;
  }

  .flow-node span {
    margin-block-start: 0.3rem;
    color: var(--color-muted);
    font-size: 0.83rem;
  }

  .flow-node-join {
    position: relative;
    margin-inline: 12%;
    border-color: var(--color-accent);
  }

  .flow-node-join::before {
    position: absolute;
    inset-block-start: calc(-1 * var(--space-3) - 1px);
    inset-inline-start: 50%;
    width: 1px;
    height: var(--space-3);
    background: var(--color-accent);
    content: "";
  }

  .proof-rail {
    margin-block-start: var(--space-5);
  }

  .proof {
    min-width: 8rem;
    flex: 1;
    border-block-start: 1px solid var(--color-border);
    padding-block-start: var(--space-3);
  }

  .proof strong,
  .proof span {
    display: block;
  }

  .proof strong {
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 1.75rem;
  }

  .proof span {
    color: var(--color-muted);
    font-size: 0.82rem;
  }

  .card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgb(12 25 41 / 0.86);
    padding: var(--space-4);
  }

  .card h3 + p,
  .card .label + h3 {
    margin-block-start: var(--space-2);
  }

  .card p,
  .muted {
    color: var(--color-muted);
  }

  .step {
    counter-increment: steps;
  }

  .steps {
    counter-reset: steps;
    list-style: none;
    padding: 0;
  }

  .step::before {
    display: block;
    margin-block-end: var(--space-3);
    color: var(--color-accent);
    content: "0" counter(steps);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
  }

  .artifact {
    display: grid;
    gap: var(--space-2);
  }

  .artifact code {
    width: fit-content;
  }

  .corpus-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
  }

  .corpus-table th,
  .corpus-table td {
    border-block-end: 1px solid var(--color-border);
    padding: var(--space-3);
    text-align: start;
    vertical-align: top;
  }

  .corpus-table th {
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .corpus-table td {
    color: var(--color-muted);
  }

  .table-scroll {
    overflow-x: auto;
    border-radius: var(--radius-md);
  }

  details {
    border-block-end: 1px solid var(--color-border);
    padding-block: var(--space-3);
  }

  summary {
    min-height: 2.75rem;
    cursor: pointer;
    color: var(--color-text);
    font-weight: 800;
  }

  details p {
    max-width: var(--measure);
    padding-block-start: var(--space-2);
    color: var(--color-muted);
  }

  .side-nav {
    align-self: start;
    border-inline-start: 1px solid var(--color-border);
    padding-inline-start: var(--space-3);
  }

  .side-nav ul {
    display: grid;
    gap: var(--space-2);
    list-style: none;
    padding: 0;
  }

  .side-nav a {
    color: var(--color-muted);
  }

  .tag-list {
    list-style: none;
    padding: 0;
  }

  .tag {
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.35rem 0.65rem;
    color: var(--color-muted);
  }

  .page-hero {
    display: grid;
    gap: var(--space-4);
    padding-block: var(--space-7) var(--space-6);
  }

  .page-hero h1 {
    max-width: 17ch;
    font-size: clamp(2.7rem, 7vw, 5.4rem);
  }

  .not-found {
    display: grid;
    min-height: calc(100svh - 4.5rem);
    place-content: center;
    gap: var(--space-4);
    text-align: center;
  }

  .not-found h1 {
    max-width: none;
  }

  @media (hover: hover) and (pointer: fine) {
    .nav-links a:hover,
    .footer-links a:hover,
    .brand:hover {
      color: var(--color-accent);
    }

    .button:hover {
      border-color: var(--color-accent);
      background: #162a42;
    }

    .button-primary:hover {
      background: #9cefff;
      color: var(--color-accent-ink);
    }
  }

  @media (max-width: 47.99rem) {
    .site-nav {
      align-items: flex-start;
      flex-direction: column;
      padding-block: 0.65rem;
    }

    .nav-links {
      display: grid;
      width: 100%;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 0 var(--space-1);
    }

    .nav-links a {
      justify-content: center;
      white-space: nowrap;
    }

    .evidence-ledger {
      min-height: 27rem;
    }
  }
}

@layer utilities {
  .accent {
    color: var(--color-accent);
  }

  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    border: 0;
    margin: -1px;
    padding: 0;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      scroll-behavior: auto !important;
      transition-duration: 0.01ms !important;
    }
  }

  @media (forced-colors: active) {
    :focus-visible {
      outline-color: CanvasText;
    }

    .status::before,
    .flow-node-join::before {
      background: CanvasText;
    }
  }
}