:root {
  --docs-panel: rgba(12, 31, 57, 0.78);
  --docs-code: #0b1d35;
  --docs-link: #64b5f6;
}

/* Binary/byte-layout diagram: adjacent fields read left to right, fixed-size
   fields narrower than variable-size ones. Used to replace "stores these
   fields in order: 1. ... 2. ..." lists for on-disk file formats. */
.doc-content .byte-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin: 1.5rem 0;
}

.doc-content .byte-layout__field {
  background: var(--docs-panel);
  border: 1px solid var(--shell-line);
  flex: 1 1 8rem;
  padding: 0.75rem 0.65rem;
  text-align: center;
}

.doc-content .byte-layout__field--grow {
  flex: 2 1 12rem;
}

.doc-content .byte-layout__field strong {
  color: var(--shell-brand-light);
  display: block;
  font-size: 0.82rem;
  margin-bottom: 0.3rem;
}

.doc-content .byte-layout__field span {
  color: var(--shell-text);
  font-size: 0.78rem;
}

.docs-main {
  min-height: 44rem;
}

.docs-nav-toggle {
  display: none;
}

.docs-nav-toggle-label {
  display: none;
}

.docs-layout {
  align-items: start;
  display: grid;
  gap: 2.25rem;
  grid-template-columns: 13rem minmax(0, 1fr) 12rem;
  padding-bottom: 4rem;
  padding-top: 2.5rem;
}

.docs-sidebar,
.docs-toc {
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  position: sticky;
  top: 5.75rem;
}

.docs-sidebar__label,
.docs-toc > p {
  color: var(--shell-brand-light);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 0.7rem;
  text-transform: uppercase;
}

.docs-nav-group {
  margin: 0 0 1.1rem;
}

.docs-nav-group__title {
  color: var(--shell-text);
  display: block;
  font-size: 0.9rem;
  font-weight: 750;
  padding: 0.25rem 0;
  text-decoration: none;
  transition: color 0.15s ease;
}

.docs-nav-group__title:hover,
.docs-nav-group__title[aria-current="page"] {
  color: #fff;
}

.docs-nav-group ul,
.docs-toc ol {
  list-style: none;
  margin: 0.35rem 0 0;
  padding: 0;
}

.docs-nav-group li + li {
  margin-top: 0.2rem;
}

.docs-nav-group li a {
  border-left: 2px solid transparent;
  color: var(--shell-muted);
  display: block;
  font-size: 0.84rem;
  line-height: 1.35;
  padding: 0.28rem 0 0.28rem 0.65rem;
  text-decoration: none;
  transition: border-left-color 0.15s ease, color 0.15s ease;
}

.docs-nav-group li a:hover,
.docs-nav-group li a[aria-current="page"] {
  border-left-color: var(--shell-brand-light);
  color: #fff;
}

.docs-article {
  min-width: 0;
}

.docs-guide {
  border-left: 3px solid var(--shell-brand-light);
  margin: 0 0 1.65rem;
  max-width: 48rem;
  padding: 0.15rem 0 0.15rem 1rem;
}

.docs-guide__eyebrow,
.docs-next-steps > p {
  color: var(--shell-brand-light);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 0.35rem;
  text-transform: uppercase;
}

.docs-guide__summary {
  color: var(--shell-muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0;
}

.doc-content {
  color: #c4d0df;
  font-size: 0.96rem;
  line-height: 1.7;
  max-width: 48rem;
  overflow-wrap: break-word;
}

.doc-content > :first-child {
  margin-top: 0;
}

.doc-content h1,
.doc-content h2,
.doc-content h3,
.doc-content h4 {
  color: #fff;
  letter-spacing: 0;
  line-height: 1.16;
  scroll-margin-top: 6.5rem;
}

.doc-content h1 {
  font-size: clamp(2.25rem, 4vw, 3.35rem);
  font-weight: 800;
  margin: 0 0 1.35rem;
}

.doc-content h2 {
  font-size: clamp(1.55rem, 2.5vw, 2.15rem);
  font-weight: 780;
  margin: 2.75rem 0 0.95rem;
}

.doc-content h3 {
  font-size: 1.2rem;
  margin: 2rem 0 0.7rem;
}

.doc-content h4 {
  font-size: 1rem;
  margin: 1.4rem 0 0.6rem;
}

.doc-content p,
.doc-content ul,
.doc-content ol {
  margin: 0 0 1rem;
}

.doc-content li + li {
  margin-top: 0.3rem;
}

.doc-content a {
  color: var(--docs-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

.doc-content code {
  border-radius: 0.3rem;
  background: rgba(100, 181, 246, 0.11);
  color: #dbeafe;
  font-family: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.85em;
  padding: 0.14rem 0.32rem;
}

.doc-content pre,
.doc-content .highlight {
  border: 1px solid var(--shell-line);
  border-radius: 0.4rem;
  background: var(--docs-code);
  margin: 1.25rem 0;
  overflow-x: auto;
  position: relative;
}

.doc-content pre {
  padding: 1rem 1.1rem;
}

.doc-content pre code,
.doc-content .highlight code {
  background: transparent;
  color: #d6e6f8;
  padding: 0;
}

.doc-content .highlight pre {
  border: 0;
  border-radius: 0;
  margin: 0;
}

.doc-content .code-copy-button {
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 0.3rem;
  background: rgba(255, 255, 255, 0.07);
  color: #dbeafe;
  cursor: pointer;
  font: inherit;
  font-size: 0.72rem;
  padding: 0.28rem 0.45rem;
  position: absolute;
  right: 0.55rem;
  top: 0.55rem;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.doc-content .code-copy-button:hover,
.doc-content .code-copy-button:focus-visible {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.4);
}

.doc-content table {
  border: 1px solid var(--shell-line);
  border-collapse: separate;
  border-radius: 0.4rem;
  border-spacing: 0;
  display: block;
  margin: 1.25rem 0;
  max-width: 100%;
  overflow-x: auto;
  width: max-content;
}

.doc-content th,
.doc-content td {
  padding: 0.7rem 0.85rem;
  text-align: left;
  vertical-align: top;
}

.doc-content th {
  background: rgba(255, 255, 255, 0.055);
  color: #fff;
  font-weight: 750;
}

.doc-content td {
  border-top: 1px solid var(--shell-line);
}

.doc-content tr:hover td {
  background: rgba(255, 255, 255, 0.025);
}

.doc-content .admonition,
.doc-content details {
  border: 1px solid rgba(100, 181, 246, 0.32);
  border-radius: 0.4rem;
  background: var(--docs-panel);
  margin: 1.25rem 0;
  padding: 0.85rem 1rem;
}

.doc-content .admonition-title,
.doc-content summary {
  color: #fff;
  font-weight: 750;
}

.doc-content .admonition > :last-child,
.doc-content details > :last-child {
  margin-bottom: 0;
}

.doc-content .tabbed-set {
  border: 1px solid var(--shell-line);
  border-radius: 0.4rem;
  background: var(--docs-panel);
  margin: 1.25rem 0;
  overflow: hidden;
}

.doc-content .tabbed-set > input {
  display: none;
}

.doc-content .tabbed-set > label {
  border-bottom: 2px solid transparent;
  color: var(--shell-muted);
  cursor: pointer;
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 700;
  padding: 0.7rem 0.85rem 0.55rem;
  transition: border-bottom-color 0.15s ease, color 0.15s ease;
}

.doc-content .tabbed-set > input:checked + label {
  border-bottom-color: var(--shell-brand-light);
  color: #fff;
}

.doc-content .tabbed-content {
  border-top: 1px solid var(--shell-line);
  padding: 0 1rem;
}

.doc-content .tabbed-block[hidden] {
  display: none;
}

.doc-content .fractum-cta {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.doc-content .fractum-btn {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 0.4rem;
  display: inline-flex;
  font-weight: 750;
  justify-content: center;
  min-height: 2.45rem;
  padding: 0.65rem 0.9rem;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.doc-content .fractum-btn:hover,
.doc-content .fractum-btn:focus-visible {
  transform: translateY(-2px);
}

.doc-content .fractum-btn:active {
  transform: translateY(0) scale(0.97);
}

.doc-content .fractum-btn-primary {
  background: var(--shell-brand);
  border-color: var(--shell-brand);
  color: #fff;
}

.doc-content .fractum-btn-secondary {
  border-color: rgba(255, 255, 255, 0.24);
  color: #fff;
}

.doc-content .grid.cards > ul {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  margin: 1.4rem 0 2.25rem;
  padding: 0;
}

.doc-content .grid.cards li {
  border: 1px solid var(--shell-line);
  border-radius: 0.4rem;
  background: var(--docs-panel);
  padding: 1.1rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.doc-content .grid.cards li:hover {
  border-color: rgba(100, 181, 246, 0.4);
  transform: translateY(-2px);
}

.doc-content .grid.cards li:active {
  transform: translateY(0) scale(0.98);
}

.doc-content .grid.cards li > :first-child {
  margin-top: 0;
}

.doc-content .grid.cards strong {
  color: var(--shell-brand-light);
  font-size: 1.05rem;
}

.doc-content .tag-group {
  border-top: 1px solid var(--shell-line);
  margin-top: 1.5rem;
  padding-top: 0.1rem;
}

.doc-content .doc-flow {
  counter-reset: doc-flow;
  display: grid;
  gap: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 1.5rem 0 2.5rem;
}

.doc-content .doc-flow a {
  border-bottom: 1px solid var(--shell-line);
  border-top: 1px solid var(--shell-line);
  color: var(--shell-text);
  display: block;
  min-height: 10.5rem;
  padding: 1rem 1rem 1rem 0;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.doc-content .doc-flow a + a {
  border-left: 1px solid var(--shell-line);
  padding-left: 1rem;
}

.doc-content .doc-flow__number {
  color: var(--shell-brand-light);
  display: block;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.doc-content .doc-flow strong,
.doc-content .doc-route-grid strong {
  color: #fff;
  display: block;
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.doc-content .doc-flow span:last-child,
.doc-content .doc-route-grid span {
  color: var(--shell-muted);
  display: block;
  font-size: 0.84rem;
  line-height: 1.5;
}

.doc-content .doc-flow a:hover,
.doc-content .doc-flow a:focus-visible,
.doc-content .doc-route-grid a:hover,
.doc-content .doc-route-grid a:focus-visible {
  background: rgba(100, 181, 246, 0.08);
  color: #fff;
}

.doc-content .doc-route-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 1.3rem 0 2.2rem;
}

.doc-content .doc-route-grid a {
  border: 1px solid var(--shell-line);
  border-radius: 0.4rem;
  background: var(--docs-panel);
  color: var(--shell-text);
  min-height: 8.5rem;
  padding: 1rem;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.docs-next-steps {
  border-top: 1px solid var(--shell-line);
  margin-top: 3rem;
  max-width: 48rem;
  padding-top: 1.15rem;
}

.docs-next-steps > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.docs-next-steps a {
  border: 1px solid rgba(100, 181, 246, 0.5);
  border-radius: 0.35rem;
  color: #dbeafe;
  font-size: 0.84rem;
  font-weight: 700;
  padding: 0.58rem 0.75rem;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.docs-next-steps a:hover,
.docs-next-steps a:focus-visible {
  background: rgba(100, 181, 246, 0.13);
  color: #fff;
}

.docs-toc ol {
  border-left: 1px solid var(--shell-line);
}

.docs-toc li a {
  color: var(--shell-muted);
  display: block;
  font-size: 0.78rem;
  line-height: 1.35;
  padding: 0.28rem 0 0.28rem 0.65rem;
  text-decoration: none;
  transition: color 0.15s ease;
}

.docs-toc li a:hover {
  color: #fff;
}

.docs-toc__level-3 a {
  padding-left: 1.15rem;
}

@media (max-width: 1120px) {
  .docs-layout {
    grid-template-columns: 12.5rem minmax(0, 1fr);
  }

  .docs-toc {
    display: none;
  }
}

@media (max-width: 780px) {
  .docs-layout {
    display: block;
    padding-top: 1rem;
  }

  .docs-nav-toggle-label {
    align-items: center;
    border: 1px solid var(--shell-line);
    border-radius: 0.4rem;
    background: var(--docs-panel);
    color: #fff;
    cursor: pointer;
    display: flex;
    font-size: 0.86rem;
    font-weight: 750;
    justify-content: space-between;
    margin: 1.5rem auto 0;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s ease, transform 0.15s ease;
  }

  .docs-nav-toggle-label:active {
    transform: scale(0.98);
  }

  .docs-nav-toggle-icon {
    color: var(--shell-brand-light);
    transition: transform 0.15s ease;
  }

  .docs-nav-toggle:checked ~ .docs-nav-toggle-label .docs-nav-toggle-icon {
    transform: rotate(180deg);
  }

  .docs-sidebar {
    display: block;
    margin: 0 auto;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding: 0 1rem;
    position: static;
    visibility: hidden;
    transition: max-height 0.3s ease, opacity 0.25s ease, padding 0.3s ease, visibility 0.3s;
  }

  .docs-nav-toggle:checked ~ .docs-layout .docs-sidebar {
    background: var(--docs-panel);
    border: 1px solid var(--shell-line);
    border-radius: 0.4rem;
    margin: 0.75rem auto 0;
    max-height: 60vh;
    opacity: 1;
    overflow-y: auto;
    padding: 1rem;
    visibility: visible;
  }

  .doc-content {
    font-size: 0.94rem;
    max-width: none;
  }

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

  .doc-content .doc-flow a:nth-child(3) {
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .doc-content .grid.cards > ul {
    grid-template-columns: 1fr;
  }

  .doc-content .doc-flow,
  .doc-content .doc-route-grid {
    grid-template-columns: 1fr;
  }

  .doc-content .doc-flow a,
  .doc-content .doc-flow a + a,
  .doc-content .doc-flow a:nth-child(3) {
    border-left: 0;
    min-height: auto;
    padding: 0.9rem 0;
  }

  .doc-content .doc-flow a + a {
    border-top: 0;
  }

  .doc-content .doc-route-grid a {
    min-height: auto;
  }

  .doc-content .fractum-cta,
  .doc-content .fractum-btn {
    width: 100%;
  }
}