*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100dvh;
  overflow-x: clip;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.view {
  padding: var(--space-lg) 0 var(--space-2xl);
  display: none;
}

.view.active {
  display: block;
}

.advanced-workbench {
  display: grid;
  gap: var(--space-lg);
}

.advanced-workbench__preview,
.advanced-workbench__editor {
  min-width: 0;
}

.advanced-preview__sticky {
  display: grid;
  gap: var(--space-md);
}

.advanced-preview__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.advanced-preview__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.advanced-scenario-summary {
  display: grid;
  gap: var(--space-sm);
}

.advanced-scenario-summary__meta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: center;
}

.advanced-scenario-summary__chips {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.advanced-scenario-summary__chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  background: var(--color-surface-muted);
}

.advanced-editor__footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--clr-border);
}

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  :root {
    --max-width: 1100px;
  }

  .advanced-workbench {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    align-items: start;
  }

  .advanced-workbench__preview {
    order: 2;
    align-self: stretch;
  }

  .advanced-workbench__editor {
    order: 1;
  }

  .advanced-preview__sticky {
    position: sticky;
    top: calc(4.5rem + var(--space-md));
    max-height: calc(100vh - 4.5rem - var(--space-md) * 2);
    overflow-y: auto;
  }

  /* Charts inside the workbench preview are too narrow for 2 columns */
  .advanced-workbench__preview .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1440px) {
  :root {
    --max-width: 1360px;
  }

  /* Enough room to restore 2-column charts inside the workbench */
  .advanced-workbench__preview .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Nav */
.site-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}

.site-nav__brand:hover {
  text-decoration: none;
}

.site-nav__brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
}

.site-nav__brand-lockup {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.site-nav__brand-lockup strong {
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.site-nav__brand-lockup span {
  color: var(--color-text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-nav__links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  flex-wrap: wrap;
  align-items: center;
}

.site-nav__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-nav__locale {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-inline-start: auto;
}

.site-nav__locale-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-nav__locale-select {
  min-height: 36px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.35rem 0.75rem;
  font: inherit;
  font-size: var(--text-sm);
  max-width: 12rem;
}

.site-nav__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.site-nav__links a:hover,
.site-nav__links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

/* ── Hamburger toggle (hidden on desktop) ────────────────────── */
.site-nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
}

.site-nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

.site-nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 639px) {
  .site-nav {
    padding: var(--space-xs) 0;
  }

  .site-nav .container {
    align-items: center;
    flex-wrap: wrap;
  }

  .site-nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .site-nav__toggle {
    display: flex;
  }

  .site-nav__brand {
    flex: 1;
  }

  .site-nav__brand-mark {
    width: 2.15rem;
    height: 2.15rem;
  }

  .site-nav__brand-lockup span {
    font-size: 0.62rem;
    letter-spacing: 0.12em;
  }

  .site-nav__links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding-top: var(--space-sm);
  }

  .site-nav__links.open {
    display: flex;
  }

  .site-nav__links li {
    width: 100%;
  }

  .site-nav__links a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    border-radius: 0;
  }

  .site-nav__locale-label {
    display: none;
  }

  .site-nav__locale-select {
    min-height: 36px;
    padding: 0.35rem 0.6rem;
    font-size: var(--text-xs);
    max-width: 10rem;
  }

  .advanced-preview__toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .advanced-preview__actions .btn {
    width: 100%;
  }
}

html[dir="rtl"] .site-nav__brand {
  flex-direction: row-reverse;
}

html[dir="rtl"] .site-nav__locale {
  margin-inline-start: 0;
  margin-inline-end: auto;
}

html[dir="rtl"] .tooltip-trigger {
  margin-left: 0;
  margin-right: var(--space-xs);
}

/* Site footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  margin-top: var(--space-2xl);
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.site-footer__link {
  color: var(--color-text-muted);
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--color-primary);
}

.site-footer__sep {
  color: var(--color-border);
}

/* Utility */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.gap-sm {
  gap: var(--space-sm);
}

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Skip link becomes visible on focus */
.sr-only--focusable:focus {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 200;
  width: auto;
  height: auto;
  padding: var(--space-sm) var(--space-md);
  margin: 0;
  overflow: visible;
  clip: auto;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
}

/* Global focus-visible styles for interactive elements */
.btn:focus-visible,
.pill:focus-visible,
.chart-view-toggle__button:focus-visible,
details > summary:focus-visible,
.site-nav__links a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Keyboard shortcut help overlay */
.kbd-help-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.kbd-help-panel {
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius);
  padding: var(--space-lg);
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-md);
  max-height: 80vh;
  overflow-y: auto;
}

.kbd-help-list {
  margin: 0;
  padding: 0;
}

.kbd-help-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-md);
}

.kbd-help-row dt {
  flex-shrink: 0;
}

.kbd-help-row dd {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-align: right;
}

kbd {
  display: inline-block;
  padding: 0.15em 0.45em;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 var(--color-border);
}