/* Material Design 3 component anatomy: buttons, tabs, cards, chips, text fields,
   sliders, switches, snackbars. Hand-rolled (no bundler, no CDN) but built from real
   M3 parts: a container, a state layer for hover/focus/press, and labelled content,
   rather than a flat coloured <div> standing in for a control. */

.md-surface {
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-lg);
  box-shadow: var(--elev-1);
}

.md-card {
  background: var(--md-surface-variant);
  border-radius: var(--shape-lg);
  padding: calc(var(--space-unit) * 2);
  display: flex;
  flex-direction: column;
  gap: var(--space-unit);
}
.md-card h3 {
  margin: 0;
  font: var(--type-title);
}
.md-card p {
  margin: 0;
  color: var(--md-on-surface-variant);
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--shape-full);
  font: var(--type-label);
  width: fit-content;
}
.status-chip[data-status="shipped"] {
  background: var(--md-tertiary-container);
  color: var(--md-on-tertiary-container);
}
.status-chip[data-status="in-progress"] {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}
.status-chip[data-status="planned"] {
  background: var(--md-surface);
  color: var(--md-on-surface-variant);
  border: 1px solid var(--md-outline);
}

/* Buttons: filled, tonal, outlined and icon, each with a state-layer pseudo-element
   so hover/focus/press read as a real M3 ripple-adjacent overlay, not a colour swap. */
.md-btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--target-min);
  min-width: var(--target-min);
  padding: 0 20px;
  border-radius: var(--shape-full);
  border: none;
  font: var(--type-label);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  background: var(--md-surface-variant);
  color: var(--md-on-surface);
  transition: box-shadow var(--motion-fast) var(--motion-easing);
}
.md-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: currentColor;
  opacity: 0;
  z-index: -1;
  transition: opacity var(--motion-fast) var(--motion-easing);
}
.md-btn:hover::after {
  opacity: 0.08;
}
.md-btn:focus-visible::after {
  opacity: 0.12;
}
.md-btn:active::after {
  opacity: 0.16;
}
.md-btn:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 2px;
}
.md-btn[data-variant="filled"] {
  background: var(--md-primary);
  color: var(--md-on-primary);
}
.md-btn[data-variant="outlined"] {
  background: transparent;
  border: 1px solid var(--md-outline);
}
.md-btn[data-variant="icon"] {
  padding: 0;
  width: var(--target-min);
  background: transparent;
}
.md-btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}
.md-btn[disabled]::after {
  display: none;
}

/* Tabs */
.tab {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: var(--target-min);
  padding: 0 16px;
  border: none;
  background: transparent;
  color: var(--md-on-surface-variant);
  font: var(--type-label);
  font-size: 0.85rem;
  border-radius: var(--shape-sm) var(--shape-sm) 0 0;
  cursor: pointer;
  white-space: nowrap;
  touch-action: manipulation;
}
.app-shell[data-tab-dock="start"] .tab {
  border-radius: var(--shape-sm);
  justify-content: flex-start;
}
.tab::after {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  z-index: -1;
  border-radius: inherit;
}
.tab:hover::after {
  opacity: 0.08;
}
.tab:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: -2px;
}
.tab[aria-selected="true"] {
  color: var(--md-primary);
  border-bottom: 3px solid var(--md-primary);
}
.app-shell[data-tab-dock="start"] .tab[aria-selected="true"] {
  border-bottom: none;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}
.tab[data-pinned="true"] .tab__pin-icon {
  opacity: 1;
}
.tab__pin-icon {
  opacity: 0.35;
  font-size: 0.75em;
}
.tab[draggable="true"] {
  cursor: grab;
}
.tab[data-drag-over="true"] {
  outline: 2px dashed var(--md-primary);
  outline-offset: -2px;
}

.tab-overflow-menu {
  position: absolute;
  right: 8px;
  top: calc(var(--row-height) + 4px);
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-md);
  box-shadow: var(--elev-2);
  min-width: 220px;
  padding: 4px;
  z-index: 30;
  display: none;
  flex-direction: column;
}
.tab-overflow-menu[data-open="true"] {
  display: flex;
}
.tab-overflow-menu button {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  min-height: 40px;
  padding: 0 10px;
  background: transparent;
  border: none;
  border-radius: var(--shape-sm);
  color: var(--md-on-surface);
  font: var(--type-body-small);
  text-align: left;
  cursor: pointer;
}
.tab-overflow-menu button:hover,
.tab-overflow-menu button:focus-visible {
  background: var(--md-surface-variant);
}

/* Text fields */
.md-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.md-field label {
  font: var(--type-label);
  color: var(--md-on-surface-variant);
}
.md-field input[type="text"],
.md-field input[type="search"] {
  min-height: var(--target-min);
  border-radius: var(--shape-sm);
  border: 1px solid var(--md-outline);
  background: var(--md-surface);
  color: var(--md-on-surface);
  padding: 0 12px;
  font: var(--type-body);
}
.md-field input:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 1px;
}
.md-field .support-text {
  font: var(--type-body-small);
  color: var(--md-on-surface-variant);
}
.md-field .support-text[data-error="true"] {
  color: var(--md-error);
}

/* Search + regex builder: an input plus a toggle plus a popover anchored beside it,
   never a whole separate page. */
.search-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.search-bar .md-field {
  flex: 1;
  min-width: 160px;
}
.regex-popover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: min(320px, 90vw);
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--shape-md);
  box-shadow: var(--elev-2);
  padding: calc(var(--space-unit) * 1.5);
  display: none;
  flex-direction: column;
  gap: 8px;
  z-index: 25;
}
.regex-popover[data-open="true"] {
  display: flex;
}
.regex-popover mark {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-radius: 3px;
}

/* Switch */
.md-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 52px;
  height: 32px;
  border-radius: var(--shape-full);
  border: 1px solid var(--md-outline);
  background: var(--md-surface-variant);
  cursor: pointer;
  padding: 0;
  flex: none;
}
.md-switch[aria-checked="true"] {
  background: var(--md-primary);
  border-color: var(--md-primary);
}
.md-switch__thumb {
  position: absolute;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--md-on-surface-variant);
  transition: transform var(--motion-fast) var(--motion-easing), background var(--motion-fast);
}
.md-switch[aria-checked="true"] .md-switch__thumb {
  transform: translateX(20px);
  background: var(--md-on-primary);
}
.md-switch:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 2px;
}

/* Slider (used for density-independent accent hue/sat/light and for nothing else,
   kept generic so future settings can reuse it) */
.md-slider {
  width: 100%;
  height: var(--target-min);
  accent-color: var(--md-primary);
}

/* Radio / segmented choice, used for theme and density */
.choice-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.choice-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--shape-full);
  border: 1px solid var(--md-outline);
  background: var(--md-surface);
  color: var(--md-on-surface);
  cursor: pointer;
  font: var(--type-body-small);
}
.choice-chip[aria-pressed="true"] {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  border-color: transparent;
}
.choice-chip:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 2px;
}

/* Notifications (M3 snackbar pattern): corner-anchored, non-blocking, auto-dismissed,
   with an accessible live region. Modals are reserved for real decisions elsewhere. */
.snackbar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--md-on-surface);
  color: var(--md-bg);
  border-radius: var(--shape-sm);
  padding: 10px 12px 10px 16px;
  box-shadow: var(--elev-3);
  animation: snackbar-in var(--motion-medium) var(--motion-easing);
}
.snackbar[data-kind="error"] {
  background: var(--md-error);
  color: var(--md-on-error);
}
.snackbar__message {
  flex: 1;
  font: var(--type-body-small);
}
.snackbar__close {
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  min-width: 32px;
  min-height: 32px;
  border-radius: 50%;
}
.snackbar__close:hover {
  background: hsl(0 0% 100% / 0.15);
}
@keyframes snackbar-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Documentation browser */
.docs-layout {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: calc(var(--space-unit) * 2);
  align-items: start;
}
@media (max-width: 640px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }
}
.docs-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.docs-list button {
  width: 100%;
  text-align: left;
  min-height: var(--target-min);
  padding: 6px 10px;
  border-radius: var(--shape-sm);
  border: none;
  background: transparent;
  color: var(--md-on-surface);
  font: var(--type-body-small);
  cursor: pointer;
}
.docs-list button[aria-current="true"] {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}
.docs-article {
  min-width: 0;
}
.docs-article h1,
.docs-article h2,
.docs-article h3 {
  font-family: var(--font-body);
}
.docs-article pre {
  background: var(--md-surface-variant);
  padding: calc(var(--space-unit) * 1.5);
  border-radius: var(--shape-sm);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.docs-article code {
  font-family: var(--font-mono);
  background: var(--md-surface-variant);
  padding: 1px 5px;
  border-radius: 4px;
}

.lang-line--secondary {
  display: block;
  font: var(--type-body-small);
  color: var(--md-on-surface-variant);
  font-family: var(--font-cjk), var(--font-latin);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.install-honest-state {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: calc(var(--space-unit) * 1.5);
  border-radius: var(--shape-md);
  border: 1px dashed var(--md-outline);
  color: var(--md-on-surface-variant);
  font: var(--type-body-small);
}