* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--zen-color-canvas);
  color: var(--zen-color-text);
  font-family: var(--zen-font-sans);
}

body {
  min-height: 100vh;
  margin: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

.catalog-shell {
  display: grid;
  grid-template-columns: 17rem minmax(0, 1fr);
  min-height: 100vh;
}

.catalog-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: var(--zen-space-5);
  border-right: var(--zen-border-width) solid var(--zen-color-border);
  background: var(--zen-color-surface);
}

.catalog-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--zen-space-3);
  color: inherit;
  font-size: var(--zen-font-size-lg);
  font-weight: 850;
  text-decoration: none;
}

.catalog-mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: var(--zen-border-width) solid var(--zen-color-border);
  border-radius: 50%;
  background: var(--zen-color-accent);
  color: #171a21;
}

.catalog-sidebar h2 {
  margin: var(--zen-space-6) 0 var(--zen-space-2);
  color: var(--zen-color-text-muted);
  font-size: var(--zen-font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.catalog-nav {
  display: grid;
  gap: var(--zen-space-1);
}

.catalog-nav a {
  padding: var(--zen-space-2) var(--zen-space-3);
  border-radius: var(--zen-radius-sm);
  color: inherit;
  text-decoration: none;
}

.catalog-nav a:hover,
.catalog-nav a[aria-current] {
  background: var(--zen-color-accent);
  color: #171a21;
}

.theme-toggle {
  width: 100%;
  margin-top: var(--zen-space-6);
  padding: var(--zen-space-2);
  border: var(--zen-border-width) solid var(--zen-color-border);
  border-radius: var(--zen-radius-md);
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.catalog-main {
  width: min(100%, var(--zen-content-width));
  padding: var(--zen-space-7) clamp(1rem, 5vw, 5rem);
  outline: none;
}

.catalog-page[hidden] {
  display: none;
}

.page-heading {
  max-width: 52rem;
  margin-bottom: var(--zen-space-7);
}

.eyebrow {
  margin: 0 0 var(--zen-space-2);
  color: var(--zen-color-info);
  font-size: var(--zen-font-size-sm);
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-heading h1 {
  margin: 0 0 var(--zen-space-3);
  font-size: var(--zen-font-size-xl);
  line-height: 1.05;
}

.page-heading p {
  color: var(--zen-color-text-muted);
  font-size: var(--zen-font-size-lg);
}

.principles,
.component-grid,
.token-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--zen-space-5);
}

.principle,
.token-group {
  padding: var(--zen-space-5);
  border: var(--zen-border-width) solid var(--zen-color-border);
  border-radius: var(--zen-radius-lg);
  background: var(--zen-color-surface);
}

.principle h2,
.token-group h2 {
  margin-top: 0;
}

.component-grid a {
  color: inherit;
  text-decoration: none;
}

.component-grid zen-card {
  height: 100%;
}

.swatch-list {
  display: grid;
  gap: var(--zen-space-2);
  margin: 0;
}

.swatch-list div {
  display: grid;
  grid-template-columns: 2rem 1fr;
  align-items: center;
  gap: var(--zen-space-2);
}

.swatch-list dt,
.swatch-list dd {
  margin: 0;
  font-family: var(--zen-font-mono);
  font-size: var(--zen-font-size-xs);
}

.swatch {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--zen-color-border);
  border-radius: 50%;
  background: var(--swatch);
}

zen-story {
  display: block;
  margin-bottom: var(--zen-space-6);
  overflow: hidden;
  border: var(--zen-border-width) solid var(--zen-color-border);
  border-radius: var(--zen-radius-lg);
  background: var(--zen-color-surface);
}

zen-story > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--zen-space-3);
  padding: var(--zen-space-3) var(--zen-space-4);
  border-bottom: 1px solid var(--zen-color-border);
}

zen-story > header h3 {
  margin: 0;
}

zen-story > header button {
  padding: var(--zen-space-1) var(--zen-space-2);
  border: 0;
  border-radius: var(--zen-radius-sm);
  background: transparent;
  color: var(--zen-color-info);
  cursor: pointer;
}

.story-canvas {
  min-height: 8rem;
  padding: clamp(1rem, 4vw, 3rem);
  background:
    linear-gradient(90deg, rgba(127, 127, 127, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(127, 127, 127, 0.08) 1px, transparent 1px);
  background-size: 1rem 1rem;
}

zen-story > pre {
  max-height: 24rem;
  overflow: auto;
  margin: 0;
  padding: var(--zen-space-4);
  border-top: 1px solid var(--zen-color-border);
  background: #111318;
  color: #f4f4f5;
  font: var(--zen-font-size-sm)/1.55 var(--zen-font-mono);
}

.demo-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--zen-space-5);
}

@media (max-width: 760px) {
  .catalog-shell {
    grid-template-columns: 1fr;
  }

  .catalog-sidebar {
    position: static;
    width: 100%;
    height: auto;
    border-right: 0;
    border-bottom: var(--zen-border-width) solid var(--zen-color-border);
  }

  .catalog-nav {
    grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  }

  .catalog-main {
    padding: var(--zen-space-6) var(--zen-space-4);
  }
}