:root,
[data-theme='light'] {
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.22vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.18vw, 1rem);
  --text-lg: clamp(1rem, 0.95rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.2rem, 1.05rem + 0.7vw, 1.75rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --color-bg: #f7f6f2;
  --color-surface: #fbfbf9;
  --color-surface-2: #f1eee8;
  --color-border: #d4d1ca;
  --color-text: #28251d;
  --color-muted: #74716a;
  --color-faint: #a9a59b;
  --color-primary: #01696f;
  --color-primary-hover: #0c4e54;
  --color-accent-soft: #d7e6e3;
  --color-code: #efeae1;
  --color-success: #437a22;
  --color-warning: #964219;
  --shadow: 0 10px 30px rgba(40, 37, 29, 0.08);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

[data-theme='dark'] {
  --color-bg: #171614;
  --color-surface: #1c1b19;
  --color-surface-2: #25231f;
  --color-border: #393836;
  --color-text: #cdccca;
  --color-muted: #98958d;
  --color-faint: #64615b;
  --color-primary: #65aeb7;
  --color-primary-hover: #89cbd2;
  --color-accent-soft: #23383a;
  --color-code: #25231f;
  --color-success: #8fc16a;
  --color-warning: #d99064;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
}

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

html {
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  overflow-x: hidden;
  margin: 0;
  min-height: 100dvh;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, color-mix(in oklab, var(--color-primary), transparent 88%), transparent 34rem),
    var(--color-bg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.35;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.skip-link:focus {
  z-index: 10;
  top: var(--space-4);
  left: var(--space-4);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-4);
  clip: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) clamp(var(--space-3), 2vw, var(--space-5));
  background: color-mix(in oklab, var(--color-bg), transparent 8%);
  border-bottom: 1px solid color-mix(in oklab, var(--color-border), transparent 40%);
  backdrop-filter: blur(16px);
}

.brand-block,
.header-actions,
.tool-card,
.section-heading,
.filters,
.drill-options {
  display: flex;
  align-items: center;
}

.brand-block {
  gap: var(--space-2);
}

.logo {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--color-primary);
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
}

.logo svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.eyebrow {
  margin: 0 0 var(--space-1);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: var(--text-base);
}

h2 {
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
  line-height: 1.15;
}

h3 {
  font-size: var(--text-base);
  line-height: 1.2;
}

.text-link,
.theme-toggle,
.primary-button,
.filter-button,
.copy-button,
.drill-option {
  min-height: 34px;
  border-radius: var(--radius-sm);
  transition:
    background 180ms cubic-bezier(0.16, 1, 0.3, 1),
    border-color 180ms cubic-bezier(0.16, 1, 0.3, 1),
    color 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.header-actions {
  gap: var(--space-3);
}

.text-link {
  display: inline-grid;
  place-items: center;
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
}

.theme-toggle,
.primary-button,
.filter-button,
.copy-button,
.drill-option {
  padding: var(--space-1) var(--space-3);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

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

.theme-toggle:hover,
.filter-button:hover,
.copy-button:hover,
.drill-option:hover {
  border-color: var(--color-primary);
}

.primary-button:hover {
  background: var(--color-primary-hover);
}

.shell {
  display: grid;
  grid-template-columns: minmax(190px, 235px) minmax(0, 1fr);
  gap: var(--space-4);
  width: min(1440px, 100%);
  max-width: 100vw;
  margin: 0 auto;
  padding: var(--space-2) clamp(var(--space-2), 2vw, var(--space-4)) var(--space-6);
}

.sidebar {
  position: sticky;
  top: 72px;
  align-self: start;
}

.tool-list {
  display: grid;
  gap: var(--space-2);
  border: 0;
  background: transparent;
}

.tool-card {
  gap: var(--space-2);
  width: 100%;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: left;
}

.tool-card:not(.active) {
  box-shadow: none;
}

.tool-card:hover {
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.tool-card.active {
  background: var(--color-accent-soft);
}

.tool-card span:last-child {
  display: block;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.tool-dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 999px;
}

.section-nav {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-3);
}

.section-nav a {
  padding: var(--space-1) var(--space-2);
  color: var(--color-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
}

.section-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.content {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
  max-width: 100%;
}

body[data-active-tool='amp'] #overview {
  order: 1;
}

body[data-active-tool='amp'] .search-panel {
  order: 2;
}

body[data-active-tool='amp'] #config {
  order: 3;
}

body[data-active-tool='amp'] #keybindings {
  order: 4;
}

body[data-active-tool='amp'] #workflows {
  order: 5;
}

body[data-active-tool='amp'] #drills {
  order: 6;
}

body[data-active-tool='amp'] #sources {
  order: 7;
}

.hero-panel,
.search-panel,
.section-block {
  min-width: 0;
  max-width: 100%;
  padding: var(--space-2) var(--space-3);
  background: color-mix(in oklab, var(--color-surface), transparent 4%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: block;
}

.hero-panel {
  padding-block: var(--space-2);
}

.hero-panel h2 {
  max-width: 90ch;
  font-size: var(--text-base);
  line-height: 1.15;
}

.hero-panel > *,
.search-panel > *,
.section-block > * {
  min-width: 0;
}

.hero-panel p {
  max-width: 88ch;
  color: var(--color-muted);
  margin-bottom: 0;
  font-size: var(--text-sm);
}

.search-panel {
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(240px, 1fr);
  gap: var(--space-2);
  align-items: center;
}

.search-panel h2 {
  margin-bottom: var(--space-1);
  font-size: var(--text-base);
  line-height: 1.1;
}

.search-panel p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

kbd,
.key,
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

kbd,
.key {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 var(--space-2);
  background: var(--color-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.search-box input {
  width: 100%;
  min-height: 34px;
  padding: 0 var(--space-3);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-1);
}

#keybindings .section-heading {
  grid-template-columns: 1fr;
}

.filters {
  flex-wrap: nowrap;
  justify-content: flex-start;
  gap: var(--space-2);
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  padding-block: var(--space-1);
  scrollbar-width: thin;
}

.filter-button {
  flex: 0 0 auto;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.filter-button.active {
  color: var(--color-bg);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.binding-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
}

.binding-card,
.workflow-card,
.snippet-card,
.drill-card {
  min-width: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid color-mix(in oklab, var(--color-border), transparent 25%);
  border-radius: var(--radius-lg);
}

.binding-card header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.binding-card h3 {
  margin-bottom: var(--space-1);
  font-size: var(--text-base);
}

.binding-card p,
.workflow-card p,
.snippet-card p {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.category-pill {
  white-space: nowrap;
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
}

.workflow-list,
.snippet-list {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
}

.snippet-list {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 430px), 1fr));
}

.workflow-card ol {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-5);
}

.workflow-card li + li {
  margin-top: var(--space-2);
}

.snippet-card header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  align-items: center;
}

pre {
  overflow-x: auto;
  max-width: 100%;
  margin: var(--space-2) 0 0;
  padding: var(--space-2);
  font-size: 0.75rem;
  line-height: 1.25;
  background: var(--color-code);
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in oklab, var(--color-border), transparent 40%);
}

.drill-card {
  background: var(--color-accent-soft);
}

.drill-label {
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 700;
}

.drill-options {
  flex-wrap: wrap;
  gap: var(--space-3);
}

.drill-option.correct {
  color: var(--color-bg);
  background: var(--color-success);
  border-color: var(--color-success);
}

.drill-option.incorrect {
  color: var(--color-bg);
  background: var(--color-warning);
  border-color: var(--color-warning);
}

.drill-feedback {
  min-height: 1.5em;
  margin: var(--space-4) 0 0;
  font-weight: 700;
}

.source-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-2);
  padding-left: 0;
  list-style: none;
}

.source-list a {
  display: block;
  padding: var(--space-3);
  color: var(--color-primary);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  text-decoration: none;
}

.empty-state {
  padding: var(--space-8);
  color: var(--color-muted);
  text-align: center;
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .section-nav {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  .hero-panel,
  .search-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .app-header,
  .section-heading,
  .snippet-card header {
    align-items: stretch;
    flex-direction: column;
  }

  .header-actions {
    justify-content: space-between;
  }

  .filters {
    justify-content: flex-start;
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  body {
    overflow-x: hidden;
  }

  .shell {
    gap: var(--space-6);
    padding-inline: var(--space-4);
  }

  .hero-panel,
  .search-panel,
  .section-block {
    padding: var(--space-5);
  }

  .section-nav {
    grid-template-columns: 1fr 1fr;
  }
}

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