/* SamwiseCampus — documentation site
 *
 * The colour roles, the radius ramp and the motion curve below are the ones
 * the application itself uses (`client/src/index.css`). They are copied rather
 * than imported because this page is served as a static asset from
 * `client/public/` and never passes through the Vite CSS pipeline — if the
 * application's palette moves, move these with it. Keeping them identical is
 * the point: the docs should look like the product, not like a theme that
 * happens to be nearby.
 *
 * Material Design 3 roles are named `--md-sys-*` throughout, and the component
 * layer below only consumes roles, never raw values.
 */

/* ---------------------------------------------------------------- tokens -- */

:root {
  /* Colour roles — light scheme. */
  --md-sys-color-primary: oklch(0.31 0.064 132);
  --md-sys-color-on-primary: oklch(0.99 0.004 95);
  --md-sys-color-primary-container: oklch(0.91 0.055 132);
  --md-sys-color-on-primary-container: oklch(0.22 0.052 132);
  --md-sys-color-secondary: oklch(0.45 0.052 102);
  --md-sys-color-secondary-container: oklch(0.91 0.04 102);
  --md-sys-color-on-secondary-container: oklch(0.28 0.043 102);
  --md-sys-color-tertiary: oklch(0.42 0.07 154);
  --md-sys-color-tertiary-container: oklch(0.9 0.05 154);
  --md-sys-color-on-tertiary-container: oklch(0.24 0.05 154);
  --md-sys-color-error: oklch(0.52 0.19 27);
  --md-sys-color-on-error: oklch(0.99 0.003 95);
  --md-sys-color-error-container: oklch(0.93 0.045 27);
  --md-sys-color-on-error-container: oklch(0.3 0.11 27);

  --md-sys-color-surface: oklch(0.985 0.005 95);
  --md-sys-color-surface-dim: oklch(0.92 0.01 95);
  --md-sys-color-surface-bright: oklch(0.995 0.003 95);
  --md-sys-color-surface-container-lowest: oklch(0.995 0.004 95);
  --md-sys-color-surface-container-low: oklch(0.97 0.006 95);
  --md-sys-color-surface-container: oklch(0.955 0.008 95);
  --md-sys-color-surface-container-high: oklch(0.94 0.011 95);
  --md-sys-color-surface-container-highest: oklch(0.925 0.013 95);
  --md-sys-color-on-surface: oklch(0.23 0.027 255);
  --md-sys-color-on-surface-variant: oklch(0.42 0.025 255);
  --md-sys-color-outline: oklch(0.62 0.018 255);
  --md-sys-color-outline-variant: oklch(0.84 0.012 255);
  --md-sys-color-inverse-surface: oklch(0.28 0.02 255);
  --md-sys-color-inverse-on-surface: oklch(0.96 0.006 95);
  --md-sys-color-scrim: oklch(0.2 0.01 255);

  /* Shape — the application's own ramp (`--radius-*` in index.css). */
  --md-sys-shape-xs: 0.25rem;
  --md-sys-shape-sm: 0.75rem;
  --md-sys-shape-md: 1rem;
  --md-sys-shape-lg: 1.25rem;
  --md-sys-shape-xl: 1.75rem;
  --md-sys-shape-full: 999px;

  /* Typescale — MD3 baseline, expressed in rem. */
  --md-sys-typescale-display-large-size: 3.5625rem;
  --md-sys-typescale-display-large-line: 4rem;
  --md-sys-typescale-display-large-tracking: -0.015625rem;
  --md-sys-typescale-display-medium-size: 2.8125rem;
  --md-sys-typescale-display-medium-line: 3.25rem;
  --md-sys-typescale-display-small-size: 2.25rem;
  --md-sys-typescale-display-small-line: 2.75rem;
  --md-sys-typescale-headline-large-size: 2rem;
  --md-sys-typescale-headline-large-line: 2.5rem;
  --md-sys-typescale-headline-medium-size: 1.75rem;
  --md-sys-typescale-headline-medium-line: 2.25rem;
  --md-sys-typescale-headline-small-size: 1.5rem;
  --md-sys-typescale-headline-small-line: 2rem;
  --md-sys-typescale-title-large-size: 1.375rem;
  --md-sys-typescale-title-large-line: 1.75rem;
  --md-sys-typescale-title-medium-size: 1rem;
  --md-sys-typescale-title-medium-line: 1.5rem;
  --md-sys-typescale-title-medium-tracking: 0.009375rem;
  --md-sys-typescale-title-small-size: 0.875rem;
  --md-sys-typescale-title-small-line: 1.25rem;
  --md-sys-typescale-title-small-tracking: 0.00625rem;
  --md-sys-typescale-body-large-size: 1rem;
  --md-sys-typescale-body-large-line: 1.5rem;
  --md-sys-typescale-body-large-tracking: 0.03125rem;
  --md-sys-typescale-body-medium-size: 0.875rem;
  --md-sys-typescale-body-medium-line: 1.25rem;
  --md-sys-typescale-body-medium-tracking: 0.015625rem;
  --md-sys-typescale-body-small-size: 0.75rem;
  --md-sys-typescale-body-small-line: 1rem;
  --md-sys-typescale-body-small-tracking: 0.025rem;
  --md-sys-typescale-label-large-size: 0.875rem;
  --md-sys-typescale-label-large-line: 1.25rem;
  --md-sys-typescale-label-large-tracking: 0.00625rem;
  --md-sys-typescale-label-medium-size: 0.75rem;
  --md-sys-typescale-label-medium-line: 1rem;
  --md-sys-typescale-label-medium-tracking: 0.03125rem;
  --md-sys-typescale-label-small-size: 0.6875rem;
  --md-sys-typescale-label-small-line: 1rem;
  --md-sys-typescale-label-small-tracking: 0.03125rem;

  /* Motion. `--md-sys-motion-emphasized` is the MD3 emphasized-decelerate
     curve; `--md-sys-motion-standard` and its 160ms duration are the ones the
     application uses for hover and focus transitions. */
  --md-sys-motion-emphasized: cubic-bezier(0.05, 0.7, 0.1, 1);
  --md-sys-motion-standard: cubic-bezier(0.23, 1, 0.32, 1);
  --md-sys-motion-duration-short: 160ms;
  --md-sys-motion-duration-medium: 300ms;
  --md-sys-motion-duration-long: 500ms;

  /* State layers — MD3 opacity values applied over a role's own colour. */
  --md-sys-state-hover: 0.08;
  --md-sys-state-focus: 0.1;
  --md-sys-state-pressed: 0.1;

  /* Typography families — the application's own stack. */
  --md-sys-typescale-brand:
    "DM Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    sans-serif;
  --md-sys-typescale-display:
    "Fraunces", ui-serif, Georgia, "Times New Roman", serif;

  /* Spacing — a 4px-based ramp, named by step rather than by pixel. */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 6rem;

  --layout-max: 84rem;
  --top-bar-height: 4rem;

  color-scheme: light;
}

.dark {
  --md-sys-color-primary: oklch(0.83 0.071 132);
  --md-sys-color-on-primary: oklch(0.19 0.045 132);
  --md-sys-color-primary-container: oklch(0.35 0.066 132);
  --md-sys-color-on-primary-container: oklch(0.91 0.045 132);
  --md-sys-color-secondary: oklch(0.77 0.051 102);
  --md-sys-color-secondary-container: oklch(0.34 0.043 102);
  --md-sys-color-on-secondary-container: oklch(0.91 0.04 102);
  --md-sys-color-tertiary: oklch(0.73 0.07 154);
  --md-sys-color-tertiary-container: oklch(0.31 0.05 154);
  --md-sys-color-on-tertiary-container: oklch(0.88 0.06 154);
  --md-sys-color-error: oklch(0.75 0.13 27);
  --md-sys-color-on-error: oklch(0.2 0.08 27);
  --md-sys-color-error-container: oklch(0.34 0.12 27);
  --md-sys-color-on-error-container: oklch(0.92 0.05 27);

  --md-sys-color-surface: oklch(0.17 0.012 255);
  --md-sys-color-surface-dim: oklch(0.12 0.01 255);
  --md-sys-color-surface-bright: oklch(0.34 0.018 255);
  --md-sys-color-surface-container-lowest: oklch(0.14 0.011 255);
  --md-sys-color-surface-container-low: oklch(0.2 0.013 255);
  --md-sys-color-surface-container: oklch(0.23 0.014 255);
  --md-sys-color-surface-container-high: oklch(0.27 0.016 255);
  --md-sys-color-surface-container-highest: oklch(0.31 0.018 255);
  --md-sys-color-on-surface: oklch(0.93 0.008 95);
  --md-sys-color-on-surface-variant: oklch(0.76 0.018 255);
  --md-sys-color-outline: oklch(0.63 0.022 255);
  --md-sys-color-outline-variant: oklch(0.38 0.018 255);
  --md-sys-color-inverse-surface: oklch(0.92 0.008 95);
  --md-sys-color-inverse-on-surface: oklch(0.23 0.015 255);
  --md-sys-color-scrim: oklch(0.08 0.005 255);

  color-scheme: dark;
}

/* ------------------------------------------------------------- elevation -- */
/* MD3 elevation is a shadow level plus a surface tint. The tint is applied by
   mixing each surface role toward `primary` rather than by stacking extra
   shadows, which is why the shadow values stay restrained. */

:root {
  --md-sys-elevation-1: 0 1px 2px
    color-mix(in oklab, var(--md-sys-color-on-surface) 8%, transparent);
  --md-sys-elevation-2: 0 2px 6px
    color-mix(in oklab, var(--md-sys-color-on-surface) 9%, transparent);
  --md-sys-elevation-3: 0 6px 16px
    color-mix(in oklab, var(--md-sys-color-on-surface) 10%, transparent);
  --md-sys-elevation-4: 0 10px 28px
    color-mix(in oklab, var(--md-sys-color-on-surface) 11%, transparent);
  --md-sys-elevation-5: 0 16px 40px
    color-mix(in oklab, var(--md-sys-color-on-surface) 13%, transparent);
}

/* ------------------------------------------------------------------ base -- */

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

html {
  scroll-behavior: smooth;
  /* Anchored sections must not slide under the fixed app bar. */
  scroll-padding-top: calc(var(--top-bar-height) + var(--space-5));
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font-family: var(--md-sys-typescale-brand);
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line);
  letter-spacing: var(--md-sys-typescale-body-large-tracking);
  font-feature-settings:
    "kern" 1,
    "liga" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  font-family: var(--md-sys-typescale-display);
  font-weight: 500;
  margin: 0;
  text-wrap: balance;
  font-variation-settings:
    "SOFT" 0,
    "WONK" 0;
}

p {
  margin: 0;
  text-wrap: pretty;
}

a {
  color: var(--md-sys-color-primary);
  text-decoration-color: color-mix(
    in oklab,
    var(--md-sys-color-primary) 40%,
    transparent
  );
  text-underline-offset: 0.2em;
  transition: text-decoration-color var(--md-sys-motion-duration-short)
    var(--md-sys-motion-standard);
}

a:hover {
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 3px solid
    color-mix(in oklab, var(--md-sys-color-primary) 64%, transparent);
  outline-offset: 3px;
  border-radius: var(--md-sys-shape-xs);
}

::selection {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.skip-link {
  position: fixed;
  left: var(--space-4);
  top: var(--space-4);
  z-index: 100;
  transform: translateY(-200%);
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  padding: var(--space-3) var(--space-4);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--md-sys-elevation-3);
  transition: transform var(--md-sys-motion-duration-short)
    var(--md-sys-motion-standard);
}

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

/* ------------------------------------------------------------- typography -- */

.md-display-large {
  font-family: var(--md-sys-typescale-display);
  font-size: var(--md-sys-typescale-display-large-size);
  line-height: var(--md-sys-typescale-display-large-line);
  letter-spacing: var(--md-sys-typescale-display-large-tracking);
  font-weight: 500;
}

.md-display-small {
  font-family: var(--md-sys-typescale-display);
  font-size: var(--md-sys-typescale-display-small-size);
  line-height: var(--md-sys-typescale-display-small-line);
  font-weight: 500;
}

.md-headline-large {
  font-family: var(--md-sys-typescale-display);
  font-size: var(--md-sys-typescale-headline-large-size);
  line-height: var(--md-sys-typescale-headline-large-line);
  font-weight: 500;
}

.md-headline-small {
  font-family: var(--md-sys-typescale-display);
  font-size: var(--md-sys-typescale-headline-small-size);
  line-height: var(--md-sys-typescale-headline-small-line);
  font-weight: 500;
}

.md-title-large {
  font-size: var(--md-sys-typescale-title-large-size);
  line-height: var(--md-sys-typescale-title-large-line);
  font-weight: 500;
}

.md-title-medium {
  font-size: var(--md-sys-typescale-title-medium-size);
  line-height: var(--md-sys-typescale-title-medium-line);
  letter-spacing: var(--md-sys-typescale-title-medium-tracking);
  font-weight: 600;
}

.md-body-large {
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line);
}

.md-body-medium {
  font-size: var(--md-sys-typescale-body-medium-size);
  line-height: var(--md-sys-typescale-body-medium-line);
  letter-spacing: var(--md-sys-typescale-body-medium-tracking);
}

.md-label-large {
  font-size: var(--md-sys-typescale-label-large-size);
  line-height: var(--md-sys-typescale-label-large-line);
  letter-spacing: var(--md-sys-typescale-label-large-tracking);
  font-weight: 500;
}

.md-label-medium {
  font-size: var(--md-sys-typescale-label-medium-size);
  line-height: var(--md-sys-typescale-label-medium-line);
  letter-spacing: var(--md-sys-typescale-label-medium-tracking);
  font-weight: 600;
}

/* `on-surface-variant` is the role for supporting text. */
.md-supporting {
  color: var(--md-sys-color-on-surface-variant);
}

.md-lede {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--md-sys-color-on-surface-variant);
  max-width: 60ch;
}

/* ---------------------------------------------------------------- layout -- */

.shell {
  display: grid;
  grid-template-columns: 17rem minmax(0, 1fr);
  gap: var(--space-8);
  width: 100%;
  max-width: var(--layout-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 62rem) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
    padding-inline: var(--space-5);
    gap: 0;
  }
}

/* --------------------------------------------------------- top app bar -- */

.top-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--top-bar-height);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-inline: var(--space-6);
  background: color-mix(in oklab, var(--md-sys-color-surface) 88%, transparent);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

@media (max-width: 62rem) {
  .top-bar {
    padding-inline: var(--space-5);
  }
}

.top-bar__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
  text-decoration: none;
  margin-right: auto;
}

/* The mark is drawn, not an image: a seed inside a rounded square, which is
   the same silhouette as the application icon in `client/public/icons/`. */
.top-bar__mark {
  width: 2rem;
  height: 2rem;
  border-radius: var(--md-sys-shape-sm);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  display: grid;
  place-items: center;
  font-family: var(--md-sys-typescale-display);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1;
  padding-bottom: 0.08em;
  flex: none;
}

.top-bar__wordmark {
  font-family: var(--md-sys-typescale-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.top-bar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.top-bar__nav a {
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--md-sys-shape-full);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 500;
  transition:
    background-color var(--md-sys-motion-duration-short)
      var(--md-sys-motion-standard),
    color var(--md-sys-motion-duration-short) var(--md-sys-motion-standard);
}

.top-bar__nav a:hover {
  background: color-mix(
    in oklab,
    var(--md-sys-color-on-surface) calc(var(--md-sys-state-hover) * 100%),
    transparent
  );
  color: var(--md-sys-color-on-surface);
}

@media (max-width: 62rem) {
  .top-bar__nav {
    display: none;
  }
}

/* The drawer toggle exists only where the sidebar is collapsed. */
.icon-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: none;
  border-radius: var(--md-sys-shape-full);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  transition: background-color var(--md-sys-motion-duration-short)
    var(--md-sys-motion-standard);
}

.icon-button:hover {
  background: color-mix(
    in oklab,
    var(--md-sys-color-on-surface) calc(var(--md-sys-state-hover) * 100%),
    transparent
  );
}

@media (max-width: 62rem) {
  .icon-button--menu {
    display: inline-flex;
  }
}

@media (min-width: 62.0625rem) {
  .icon-button--theme {
    display: inline-flex;
  }
}

/* -------------------------------------------------------------- buttons -- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.75rem;
  padding-inline: var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--md-sys-shape-full);
  font-family: inherit;
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 600;
  letter-spacing: var(--md-sys-typescale-label-large-tracking);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    box-shadow var(--md-sys-motion-duration-short) var(--md-sys-motion-standard),
    background-color var(--md-sys-motion-duration-short)
      var(--md-sys-motion-standard);
}

/* Every variant shares one state-layer mechanic: a pseudo-element tinted with
   the variant's own "on" colour, faded in on hover and press. */
.button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short)
    var(--md-sys-motion-standard);
  pointer-events: none;
}

.button:hover::after {
  opacity: var(--md-sys-state-hover);
}

.button:active::after {
  opacity: var(--md-sys-state-pressed);
}

.button--filled {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.button--filled:hover {
  box-shadow: var(--md-sys-elevation-2);
}

.button--tonal {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.button--tonal:hover {
  box-shadow: var(--md-sys-elevation-1);
}

.button--outlined {
  border-color: var(--md-sys-color-outline);
  color: var(--md-sys-color-primary);
  background: transparent;
}

.button--text {
  color: var(--md-sys-color-primary);
  background: transparent;
  padding-inline: var(--space-3);
}

.button--small {
  min-height: 2.25rem;
  padding-inline: var(--space-4);
}

.button > svg {
  flex: none;
}

/* ----------------------------------------------------------------- chips -- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 2rem;
  padding-inline: var(--space-3);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-sm);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 500;
  white-space: nowrap;
}

.chip--assist {
  background: var(--md-sys-color-surface-container-high);
  border-color: transparent;
}

.chip--primary {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: transparent;
}

.chip--tertiary {
  background: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
  border-color: transparent;
}

.chip--error {
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
  border-color: transparent;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ----------------------------------------------------------------- cards -- */

.card {
  border-radius: var(--md-sys-shape-lg);
  padding: var(--space-6);
  background: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.card--elevated {
  background: var(--md-sys-color-surface-container-low);
  border-color: transparent;
  box-shadow: var(--md-sys-elevation-1);
  transition:
    box-shadow var(--md-sys-motion-duration-medium)
      var(--md-sys-motion-standard),
    transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-standard);
}

.card--elevated:hover {
  box-shadow: var(--md-sys-elevation-3);
  transform: translateY(-2px);
}

.card--outlined {
  background: transparent;
  border: 1px solid var(--md-sys-color-outline-variant);
}

.card--filled {
  background: var(--md-sys-color-surface-container-high);
  border-color: transparent;
}

.card__title {
  margin-bottom: var(--space-2);
}

.card__body {
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-medium-size);
  line-height: var(--md-sys-typescale-body-medium-line);
}

.card__icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--md-sys-shape-md);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-5);
}

/* ------------------------------------------------------------- sections -- */

.section {
  padding-block: var(--space-9);
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.section:first-of-type {
  border-top: none;
}

.section__eyebrow {
  display: block;
  font-size: var(--md-sys-typescale-label-medium-size);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-sys-color-primary);
  margin-bottom: var(--space-3);
}

.section__title {
  margin-bottom: var(--space-4);
}

.section__lede {
  margin-bottom: var(--space-7);
}

.stack {
  display: grid;
  gap: var(--space-5);
}

.stack--tight {
  gap: var(--space-4);
}

.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
}

.grid--two {
  grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
}

.grid--four {
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

/* ----------------------------------------------------------------- hero -- */

.hero {
  position: relative;
  padding-block: var(--space-9) var(--space-10);
  overflow: hidden;
}

/* A tonal wash rather than a picture: two soft primary/secondary pools that
   sit behind the headline and fade out before the content starts. */
.hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 42rem;
  background:
    radial-gradient(
      42rem 26rem at 18% 30%,
      color-mix(in oklab, var(--md-sys-color-primary) 16%, transparent),
      transparent 70%
    ),
    radial-gradient(
      34rem 22rem at 78% 12%,
      color-mix(in oklab, var(--md-sys-color-tertiary) 14%, transparent),
      transparent 72%
    );
  pointer-events: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero__headline {
  max-width: 22ch;
  margin-bottom: var(--space-5);
}

.hero__lede {
  max-width: 56ch;
  margin-bottom: var(--space-6);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

/* ------------------------------------------------------------ stat strip -- */

.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: var(--space-4);
  padding: var(--space-6);
  border-radius: var(--md-sys-shape-lg);
  background: color-mix(
    in oklab,
    var(--md-sys-color-surface-container) 70%,
    transparent
  );
  border: 1px solid var(--md-sys-color-outline-variant);
}

.stat__value {
  font-family: var(--md-sys-typescale-display);
  font-size: 2rem;
  line-height: 1.1;
  font-weight: 600;
  color: var(--md-sys-color-primary);
  font-variation-settings:
    "SOFT" 0,
    "WONK" 1;
}

.stat__label {
  font-size: var(--md-sys-typescale-label-medium-size);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--md-sys-color-on-surface-variant);
  text-transform: uppercase;
}

/* ------------------------------------------------------------- app frame -- */
/* A decorative rendering of the application's own chrome, built from divs so
   it costs no image weight and inherits the theme. It is marked
   `aria-hidden` in the markup — it shows the shape of the product and carries
   no information the prose does not already state. */

.app-frame {
  border-radius: var(--md-sys-shape-xl);
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-low);
  box-shadow: var(--md-sys-elevation-4);
  overflow: hidden;
}

.app-frame__bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container);
}

.app-frame__dot {
  width: 0.625rem;
  height: 0.625rem;
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-outline-variant);
}

.app-frame__url {
  margin-left: var(--space-3);
  font-size: var(--md-sys-typescale-label-small-size);
  color: var(--md-sys-color-on-surface-variant);
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-sys-shape-full);
  padding: 0.125rem var(--space-3);
}

.app-frame__body {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  min-height: 18rem;
}

.app-frame__rail {
  border-right: 1px solid var(--md-sys-color-outline-variant);
  padding: var(--space-4) var(--space-3);
  display: grid;
  gap: var(--space-1);
  align-content: start;
  background: var(--md-sys-color-surface-container-low);
}

.app-frame__item {
  font-size: var(--md-sys-typescale-label-medium-size);
  color: var(--md-sys-color-on-surface-variant);
  padding: 0.375rem var(--space-3);
  border-radius: var(--md-sys-shape-full);
}

.app-frame__item--active {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  font-weight: 600;
}

.app-frame__canvas {
  padding: var(--space-5);
  display: grid;
  gap: var(--space-4);
  align-content: start;
}

.app-frame__tile {
  height: 3.25rem;
  border-radius: var(--md-sys-shape-md);
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.app-frame__tile--wide {
  height: 7rem;
}

@media (max-width: 40rem) {
  .app-frame__body {
    grid-template-columns: minmax(0, 1fr);
  }
  .app-frame__rail {
    display: none;
  }
}

/* ------------------------------------------------------------ side nav -- */

.side-nav {
  position: sticky;
  top: var(--top-bar-height);
  align-self: start;
  max-height: calc(100vh - var(--top-bar-height));
  overflow-y: auto;
  padding-block: var(--space-8) var(--space-6);
}

@media (max-width: 62rem) {
  .side-nav {
    position: fixed;
    inset: var(--top-bar-height) auto 0 0;
    width: min(20rem, 84vw);
    max-height: none;
    z-index: 45;
    background: var(--md-sys-color-surface-container-low);
    border-right: 1px solid var(--md-sys-color-outline-variant);
    box-shadow: var(--md-sys-elevation-3);
    padding: var(--space-5);
    transform: translateX(-102%);
    transition: transform var(--md-sys-motion-duration-medium)
      var(--md-sys-motion-emphasized);
  }

  .side-nav[data-open="true"] {
    transform: translateX(0);
  }
}

.side-nav__title {
  font-size: var(--md-sys-typescale-label-medium-size);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-sys-color-on-surface-variant);
  padding-inline: var(--space-3);
  margin-bottom: var(--space-3);
}

.side-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.125rem;
}

.side-nav__list a {
  display: block;
  padding: 0.4375rem var(--space-3);
  border-radius: var(--md-sys-shape-full);
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-size: var(--md-sys-typescale-body-medium-size);
  font-weight: 500;
  transition:
    background-color var(--md-sys-motion-duration-short)
      var(--md-sys-motion-standard),
    color var(--md-sys-motion-duration-short) var(--md-sys-motion-standard);
}

.side-nav__list a:hover {
  background: color-mix(
    in oklab,
    var(--md-sys-color-on-surface) calc(var(--md-sys-state-hover) * 100%),
    transparent
  );
  color: var(--md-sys-color-on-surface);
}

/* Scroll-spy state. Set by app.js; aria-current carries the same fact to
   assistive technology. */
.side-nav__list a[aria-current="true"] {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  font-weight: 600;
}

.scrim {
  display: none;
}

@media (max-width: 62rem) {
  .scrim[data-open="true"] {
    display: block;
    position: fixed;
    inset: var(--top-bar-height) 0 0 0;
    z-index: 44;
    background: color-mix(in oklab, var(--md-sys-color-scrim) 32%, transparent);
    border: none;
    padding: 0;
  }
}

/* -------------------------------------------------------------- details -- */

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

.feature__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.feature__path {
  font-family:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--md-sys-typescale-label-medium-size);
  color: var(--md-sys-color-on-surface-variant);
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-sys-shape-xs);
  padding: 0.125rem var(--space-2);
}

/* Capability lists inside feature cards. Each row is one thing the workspace
   actually does, taken from a procedure that exists in `server/routers.ts`. */
.capability-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.capability-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  font-size: var(--md-sys-typescale-body-medium-size);
  line-height: var(--md-sys-typescale-body-medium-line);
  color: var(--md-sys-color-on-surface-variant);
}

.capability-list li::before {
  content: "";
  width: 0.375rem;
  height: 0.375rem;
  margin-top: 0.5rem;
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-primary);
  opacity: 0.55;
}

/* --------------------------------------------------------------- tables -- */
/* MD3 tables: a header row on a container colour, hairline dividers, no
   vertical rules, generous row height. */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--md-sys-shape-lg);
  border: 1px solid var(--md-sys-color-outline-variant);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--md-sys-typescale-body-medium-size);
  line-height: var(--md-sys-typescale-body-medium-line);
}

caption {
  caption-side: bottom;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small-size);
}

th,
td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  vertical-align: top;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

thead th {
  background: var(--md-sys-color-surface-container);
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody th {
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
}

td code,
th code {
  font-size: 0.8125rem;
}

/* -------------------------------------------------------------- callout -- */

.callout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--md-sys-shape-lg);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.callout--neutral {
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
}

.callout__icon {
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.85;
}

.callout p + p {
  margin-top: var(--space-3);
}

.callout strong {
  font-weight: 700;
}

/* ----------------------------------------------------------------- code -- */

code {
  font-family:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-sys-shape-xs);
  padding: 0.125em 0.375em;
}

pre {
  margin: 0;
  padding: var(--space-5);
  border-radius: var(--md-sys-shape-lg);
  background: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.7;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* ---------------------------------------------------------------- steps -- */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: var(--space-5);
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.steps li::before {
  content: counter(step);
  width: 2rem;
  height: 2rem;
  border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: grid;
  place-items: center;
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 700;
  flex: none;
}

.steps__title {
  font-weight: 600;
  margin-bottom: 0.125rem;
}

.steps__body {
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-medium-size);
  line-height: var(--md-sys-typescale-body-medium-line);
}

/* ------------------------------------------------------------------ faq -- */

.faq-item {
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.faq-item summary {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  cursor: pointer;
  font-size: var(--md-sys-typescale-title-medium-size);
  font-weight: 600;
  line-height: var(--md-sys-typescale-title-medium-line);
  list-style: none;
  transition: color var(--md-sys-motion-duration-short)
    var(--md-sys-motion-standard);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--md-sys-color-primary);
}

.faq-item summary::after {
  content: "";
  margin-left: auto;
  width: 0.625rem;
  height: 0.625rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-0.125rem);
  transition: transform var(--md-sys-motion-duration-medium)
    var(--md-sys-motion-emphasized);
  flex: none;
}

.faq-item[open] summary::after {
  transform: rotate(-135deg) translateY(-0.125rem);
}

.faq-item__answer {
  padding-bottom: var(--space-5);
  color: var(--md-sys-color-on-surface-variant);
  max-width: 68ch;
}

.faq-item__answer p + p {
  margin-top: var(--space-3);
}

/* --------------------------------------------------------------- footer -- */

.site-footer {
  border-top: 1px solid var(--md-sys-color-outline-variant);
  padding-block: var(--space-8);
  margin-top: var(--space-9);
}

.site-footer__inner {
  width: 100%;
  max-width: var(--layout-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  align-items: center;
  justify-content: space-between;
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-medium-size);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}

@media (max-width: 62rem) {
  .site-footer__inner {
    padding-inline: var(--space-5);
  }
}

/* ------------------------------------------------------------ utilities -- */

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

.divider {
  height: 1px;
  background: var(--md-sys-color-outline-variant);
  border: none;
  margin: 0;
}

/* Entrance animation, applied by an IntersectionObserver in app.js. Elements
   start visible and are only hidden once the script confirms it can reveal
   them, so a failed script leaves a readable page. */
[data-reveal="pending"] {
  opacity: 0;
  transform: translateY(0.75rem);
}

[data-reveal="shown"] {
  opacity: 1;
  transform: none;
  transition:
    opacity var(--md-sys-motion-duration-long) var(--md-sys-motion-emphasized),
    transform var(--md-sys-motion-duration-long) var(--md-sys-motion-emphasized);
}

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

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

  [data-reveal="pending"] {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .top-bar,
  .side-nav,
  .scrim,
  .hero::before {
    display: none !important;
  }

  .shell {
    grid-template-columns: minmax(0, 1fr);
    padding-inline: 0;
  }

  body {
    background: #fff;
  }
}