/* Skipper docs — hand-authored stylesheet.
   Primer-derived neutral palette + GitHub blue accent, with a fixed
   sidebar / scrollable main layout. Code highlighting is rendered
   inline by chroma; this file styles the surrounding <pre> wrapper,
   tables, admonitions, and the ScalingCalculator widget. */

:root {
  color-scheme: light dark;

  --primer-fg: #1f2328;
  --primer-fg-muted: #59636e;
  --primer-fg-accent: #0969da;
  --primer-fg-success: #1a7f37;
  --primer-fg-attention: #9a6700;
  --primer-fg-danger: #d1242f;
  --primer-bg: #ffffff;
  --primer-bg-muted: #f6f8fa;
  --primer-bg-inline-code: rgba(175, 184, 193, 0.2);
  --primer-border: #d1d9e0;
  --primer-border-muted: #d8dee4;

  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primer-fg: #e6edf3;
    --primer-fg-muted: #8b949e;
    --primer-fg-accent: #58a6ff;
    --primer-fg-success: #3fb950;
    --primer-fg-attention: #d29922;
    --primer-fg-danger: #f85149;
    --primer-bg: #0d1117;
    --primer-bg-muted: #151b23;
    --primer-bg-inline-code: rgba(110, 118, 129, 0.4);
    --primer-border: #30363d;
    --primer-border-muted: #21262d;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --primer-fg: #e6edf3;
  --primer-fg-muted: #8b949e;
  --primer-fg-accent: #58a6ff;
  --primer-fg-success: #3fb950;
  --primer-fg-attention: #d29922;
  --primer-fg-danger: #f85149;
  --primer-bg: #0d1117;
  --primer-bg-muted: #151b23;
  --primer-bg-inline-code: rgba(110, 118, 129, 0.4);
  --primer-border: #30363d;
  --primer-border-muted: #21262d;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--primer-bg);
  color: var(--primer-fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primer-fg-accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  min-height: 100vh;
}

@media (max-width: 64rem) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.sidebar {
  border-right: 1px solid var(--primer-border);
  padding: 1.25rem 1rem;
  font-size: 0.875rem;
  background: var(--primer-bg);
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
}

@media (max-width: 64rem) {
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--primer-border);
  }
}

.sidebar-top {
  list-style: none;
  margin: 0 0 1rem 0;
  padding: 0;
}

.sidebar-top li {
  margin: 0;
}

.sidebar-top a {
  display: block;
  padding: 0.25rem 0.5rem;
  font-weight: 600;
  border-radius: 0.25rem;
}

.sidebar-top a:hover {
  background: var(--primer-bg-muted);
  text-decoration: none;
}

.sidebar-group {
  margin-bottom: 0.75rem;
}

.sidebar-group > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primer-fg-muted);
  user-select: none;
}

.sidebar-group > summary::-webkit-details-marker {
  display: none;
}

.sidebar-group ul {
  list-style: none;
  margin: 0.25rem 0 0 0;
  padding: 0;
}

.sidebar-group li {
  margin: 0;
}

.sidebar-group a {
  display: block;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  color: var(--primer-fg);
}

.sidebar-group a:hover {
  background: var(--primer-bg-muted);
  text-decoration: none;
}

.content {
  padding: 1.5rem 2rem 4rem 2rem;
  max-width: 56rem;
}

@media (max-width: 48rem) {
  .content {
    padding: 1rem 1rem 3rem 1rem;
  }
}

.content h1 {
  font-size: 2rem;
  font-weight: 600;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  line-height: 1.25;
}

.content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--primer-border-muted);
  line-height: 1.25;
}

.content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.25;
}

.content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.content p {
  margin: 0.75rem 0;
}

.content ul,
.content ol {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}

.content li {
  margin: 0.25rem 0;
}

.content li > p {
  margin: 0.25rem 0;
}

.content blockquote {
  margin: 0.75rem 0;
  padding: 0 1rem;
  color: var(--primer-fg-muted);
  border-left: 4px solid var(--primer-border);
}

.content hr {
  border: 0;
  height: 1px;
  background: var(--primer-border-muted);
  margin: 2rem 0;
}

/* Inline code */
.content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.15em 0.35em;
  background: var(--primer-bg-inline-code);
  border-radius: 4px;
  white-space: nowrap;
}

/* Code blocks (chroma renders inline styles, we frame the wrapper) */
.content pre {
  margin: 0.75rem 0;
  padding: 1rem;
  background: var(--primer-bg-muted);
  border: 1px solid var(--primer-border-muted);
  border-radius: 6px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.content pre code {
  font-family: inherit;
  font-size: inherit;
  white-space: pre;
  background: none;
  padding: 0;
}

/* Tables */
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
}

.content table th,
.content table td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--primer-border);
  text-align: left;
  vertical-align: top;
}

.content table th {
  background: var(--primer-bg-muted);
  font-weight: 600;
  white-space: nowrap;
}

.content table td:first-child {
  white-space: nowrap;
}

.content table td code,
.content table th code {
  white-space: nowrap;
}

.content .table-scroll {
  position: relative;
  overflow-x: auto;
}

/* Admonitions */
.aside {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--primer-border);
  border-radius: 0 6px 6px 0;
  background: var(--primer-bg-muted);
}

.aside-title {
  margin: 0 0 0.4rem 0;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primer-fg);
}

.aside-content {
  font-size: 0.95rem;
}

.aside-content p {
  margin: 0.4rem 0;
}

.aside-content p:first-child {
  margin-top: 0;
}

.aside-content p:last-child {
  margin-bottom: 0;
}

.aside-note {
  border-left-color: var(--primer-fg-accent);
}

.aside-tip {
  border-left-color: var(--primer-fg-success);
}

.aside-tip .aside-title {
  color: var(--primer-fg-success);
}

.aside-caution {
  border-left-color: var(--primer-fg-attention);
}

.aside-caution .aside-title {
  color: var(--primer-fg-attention);
}

/* ScalingCalculator widget */
.scaling-calculator {
  --calc-color-over: #f97583;
  --calc-color-under: #79c0ff;

  border: 1px solid var(--primer-border);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.calc-section-header {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primer-fg-muted);
  margin-bottom: 0.5rem;
}

.calc-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 1.25rem;
}

@media (max-width: 40rem) {
  .calc-inputs {
    grid-template-columns: 1fr;
  }
}

.calc-field {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.calc-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
  color: var(--primer-fg);
}

.calc-slider-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.calc-slider-row input[type="range"] {
  flex: 1;
  min-width: 0;
  accent-color: var(--primer-fg-accent);
}

.calc-slider-row output {
  width: 3.5rem;
  flex-shrink: 0;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--primer-fg);
}

.calc-output {
  font-size: 0.85rem;
}

.calc-step {
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--primer-border-muted);
}

.calc-step:last-of-type {
  border-bottom: none;
}

.calc-step-main {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.calc-label {
  color: var(--primer-fg);
  font-weight: 500;
  flex-shrink: 0;
  font-size: 0.8rem;
}

.calc-value {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.calc-hint {
  font-size: 0.75rem;
  color: var(--primer-fg-muted);
  margin-top: 0.1rem;
}

.calc-bar-track {
  height: 4px;
  background: var(--primer-border-muted);
  border-radius: 2px;
  margin-top: 0.3rem;
  overflow: hidden;
}

.calc-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition:
    width 0.15s ease,
    background-color 0.15s ease;
}

.calc-verdict {
  margin-top: 0.5rem;
  padding: 0.4rem 0.6rem;
  border-radius: 0.375rem;
  font-weight: 600;
  font-size: 0.85rem;
}

.calc-verdict.no-change {
  color: var(--primer-fg);
  background: var(--primer-bg-muted);
}

.calc-verdict.scale-up {
  color: var(--calc-color-over);
  background: rgba(249, 117, 131, 0.08);
}

.calc-verdict.scale-down {
  color: var(--calc-color-under);
  background: rgba(121, 192, 255, 0.08);
}