/* ============================================================================
   components.css — Axiometa Inventory Manager components
   Direction: Tally
   Depends on: tokens.css
   
   Pure HTML + CSS. No framework. Every interactive element has:
     - visible :focus-visible ring (3px, brand)
     - :hover and :active states where appropriate
     - explicit [disabled] styling and pointer-events:none
     - aria-* attribute conventions documented in section headers
   
   Naming convention:
     .component                 — root
     .component__part           — child element (BEM-ish)
     .component--variant        — style variant
     .component.is-state        — runtime state (is-loading, is-open, etc.)
   
   Tables, modals, and nav are at the bottom — they have the most LoC.
============================================================================ */

/* ─── RESET + BASE ────────────────────────────────────────────────────── */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-md);
  color: var(--color-fg-default);
  background: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Tabular numerals everywhere we render numeric inventory data. Components
   that opt out (display headlines, etc.) reset with `.font-prop`. */
.font-mono,
.tabular-nums {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.font-display { font-family: var(--font-display); }
.font-sans    { font-family: var(--font-sans); }
.font-prop    { font-variant-numeric: normal; }

/* Visually hide content for screen readers only. Required for accessible
   form labels, icon buttons, "skip to content" links, etc. */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Universal focus default — visible 3px ring, no outline. Use :focus-visible
   so mouse clicks don't trigger it; keyboard tab does. */
:focus { outline: none; }
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-xs);
}

/* For when focus is on top of a coloured background — adds a 2px offset
   in the surface color before the ring. */
.focus-offset:focus-visible {
  box-shadow:
    0 0 0 2px var(--focus-ring-offset),
    var(--focus-ring);
}

/* ─── TYPOGRAPHY UTILITIES ────────────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: var(--fw-semibold); }

.h-display {
  font-family: var(--font-display);
  font-size: var(--fs-4xl);
  line-height: var(--lh-4xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-tight);
}
.h-1 { font-family: var(--font-display); font-size: var(--fs-3xl); line-height: var(--lh-3xl); font-weight: var(--fw-bold); letter-spacing: var(--tracking-tight); }
.h-2 { font-family: var(--font-display); font-size: var(--fs-2xl); line-height: var(--lh-2xl); font-weight: var(--fw-bold); letter-spacing: var(--tracking-snug); }
.h-3 { font-size: var(--fs-xl);  line-height: var(--lh-xl);  font-weight: var(--fw-semibold); letter-spacing: var(--tracking-snug); }
.h-4 { font-size: var(--fs-lg);  line-height: var(--lh-lg);  font-weight: var(--fw-semibold); }
.h-5 { font-size: var(--fs-md);  line-height: var(--lh-md);  font-weight: var(--fw-semibold); }

.text-lg  { font-size: var(--fs-lg); line-height: var(--lh-lg); }
.text-md  { font-size: var(--fs-md); line-height: var(--lh-md); }
.text-sm  { font-size: var(--fs-sm); line-height: var(--lh-sm); color: var(--color-fg-secondary); }
.text-xs  { font-size: var(--fs-xs); line-height: var(--lh-xs); color: var(--color-fg-muted); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-fg-muted);
}

.muted     { color: var(--color-fg-muted); }
.secondary { color: var(--color-fg-secondary); }

/* ─── LINKS ───────────────────────────────────────────────────────────── */

a {
  color: var(--color-fg-link);
  text-decoration: underline;
  text-decoration-color: rgba(124, 92, 255, 0.3);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--dur-fast) var(--ease-out);
}
a:hover { text-decoration-color: var(--brand-500); }
a:focus-visible {
  outline: none;
  border-radius: var(--radius-xs);
  box-shadow: var(--focus-ring);
}

/* ─── BUTTONS ─────────────────────────────────────────────────────────── */

/* Usage:
   <button class="btn btn-primary">Save</button>
   <button class="btn btn-secondary" disabled>Cancel</button>
   <button class="btn btn-primary btn-lg is-loading">Saving…</button>
   
   For icon-only buttons, ALWAYS provide aria-label or text in .sr-only:
   <button class="btn btn-ghost btn-icon" aria-label="Settings">
     <svg …></svg>
   </button>
*/

.btn {
  --_btn-bg: var(--color-bg-surface);
  --_btn-fg: var(--color-fg-default);
  --_btn-border: var(--color-border-default);
  --_btn-bg-hover: var(--color-bg-sunken);
  --_btn-shadow: var(--shadow-xs);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);

  height: 36px;
  padding: 0 var(--sp-4);
  border-radius: var(--radius-md);
  border: var(--border-width-1) solid var(--_btn-border);
  background: var(--_btn-bg);
  color: var(--_btn-fg);
  box-shadow: var(--_btn-shadow);

  font-family: var(--font-sans);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  line-height: 1;
  letter-spacing: var(--tracking-snug);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}
.btn:hover  { background: var(--_btn-bg-hover); }
.btn:active { transform: translateY(1px); box-shadow: none; }
.btn:focus-visible { box-shadow: var(--focus-ring); }
.btn[disabled],
.btn[aria-disabled='true'] {
  color: var(--color-fg-disabled);
  background: var(--color-bg-sunken);
  border-color: var(--color-border-subtle);
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
}

/* Primary — brand fill, white text */
.btn-primary {
  --_btn-bg: var(--color-action-bg);
  --_btn-fg: var(--color-action-fg);
  --_btn-border: transparent;
  --_btn-bg-hover: var(--color-action-bg-hover);
  --_btn-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 4px 12px rgba(124, 92, 255, 0.35);
}
.btn-primary:active { background: var(--color-action-bg-active); }

/* Secondary — neutral fill, used for non-primary actions */
.btn-secondary {
  --_btn-bg: var(--color-bg-surface);
  --_btn-fg: var(--color-fg-default);
  --_btn-border: var(--color-border-default);
}

/* Subtle/tinted — used inside cards where a secondary's outline would be loud */
.btn-subtle {
  --_btn-bg: var(--color-action-bg-subtle);
  --_btn-fg: var(--color-action-fg-on-subtle);
  --_btn-border: transparent;
  --_btn-bg-hover: var(--brand-100);
  --_btn-shadow: none;
}

/* Ghost — text-like; no fill until hover */
.btn-ghost {
  --_btn-bg: transparent;
  --_btn-fg: var(--color-fg-default);
  --_btn-border: transparent;
  --_btn-bg-hover: var(--color-bg-sunken);
  --_btn-shadow: none;
}

/* Danger — destructive actions only (delete, void, etc.) */
.btn-danger {
  --_btn-bg: var(--danger-500);
  --_btn-fg: #fff;
  --_btn-border: transparent;
  --_btn-bg-hover: var(--danger-600);
  --_btn-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 4px 12px rgba(184, 46, 92, 0.35);
}
.btn-danger:focus-visible { box-shadow: var(--focus-ring-danger); }

/* Sizes */
.btn-sm  { height: 28px; padding: 0 var(--sp-3); font-size: var(--fs-sm); border-radius: var(--radius-sm); }
.btn-lg  { height: 44px; padding: 0 var(--sp-5); font-size: var(--fs-lg); border-radius: var(--radius-md); }

/* Icon-only */
.btn-icon { padding: 0; width: 36px; }
.btn-icon.btn-sm { width: 28px; }
.btn-icon.btn-lg { width: 44px; }

/* Loading — spinner displayed via ::before. Pair with aria-busy="true" */
.btn.is-loading {
  color: transparent;
  pointer-events: none;
}
.btn.is-loading::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  color: var(--color-fg-default);
  animation: spin 700ms linear infinite;
}
.btn-primary.is-loading::before,
.btn-danger.is-loading::before { color: #fff; }
.btn { position: relative; }

@keyframes spin { to { transform: rotate(360deg); } }

/* Button group — joined horizontal buttons (e.g. stepper). */
.btn-group {
  display: inline-flex;
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  border: var(--border-width-1) solid var(--color-border-default);
  overflow: hidden;
}
.btn-group > .btn {
  border-radius: 0;
  border: 0;
  border-right: var(--border-width-1) solid var(--color-border-subtle);
  box-shadow: none;
  background: transparent;
}
.btn-group > .btn:last-child { border-right: 0; }
.btn-group > .btn:hover { background: var(--color-bg-sunken); }

/* ─── INPUTS ──────────────────────────────────────────────────────────── */

/* Usage:
   <label class="field">
     <span class="field__label">Component name</span>
     <input class="input" type="text" placeholder="e.g. 0.96 IPS Display">
     <span class="field__hint">SKU is auto-generated from name + supplier.</span>
   </label>
   
   For error state, add .is-invalid to the input and aria-describedby pointing
   to a .field__error <span>. The label MUST be present for every input.
*/

.field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1_5);
}
.field__label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-fg-secondary);
  letter-spacing: var(--tracking-snug);
}
.field__label .req { color: var(--danger-500); margin-left: 2px; }
.field__hint {
  font-size: var(--fs-xs);
  color: var(--color-fg-muted);
  line-height: var(--lh-sm);
}
.field__error {
  font-size: var(--fs-xs);
  color: var(--color-danger-fg);
  font-weight: var(--fw-medium);
  line-height: var(--lh-sm);
  display: flex;
  align-items: center;
  gap: 4px;
}

.input,
.textarea,
.select {
  display: block;
  width: 100%;
  height: 40px;
  padding: 0 var(--sp-3);
  border-radius: var(--radius-md);
  border: var(--border-width-1) solid var(--color-border-default);
  background: var(--color-bg-surface);
  color: var(--color-fg-default);
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: 1.4;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}
.textarea { height: auto; min-height: 80px; padding: var(--sp-2) var(--sp-3); resize: vertical; line-height: var(--lh-md); }

.input::placeholder,
.textarea::placeholder { color: var(--color-fg-muted); }

.input:hover,
.textarea:hover,
.select:hover { border-color: var(--color-border-strong); }

.input:focus-visible,
.textarea:focus-visible,
.select:focus-visible {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: var(--focus-ring);
}

.input[disabled],
.textarea[disabled],
.select[disabled] {
  background: var(--color-bg-sunken);
  color: var(--color-fg-disabled);
  cursor: not-allowed;
}

.input.is-invalid,
.textarea.is-invalid,
.select.is-invalid {
  border-color: var(--danger-500);
}
.input.is-invalid:focus-visible,
.textarea.is-invalid:focus-visible,
.select.is-invalid:focus-visible { box-shadow: var(--focus-ring-danger); }

/* Mono inputs — for SKUs, quantities, prices */
.input--mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* Compact input — for inline cells in tables */
.input--sm { height: 32px; font-size: var(--fs-sm); padding: 0 var(--sp-2); border-radius: var(--radius-sm); }

/* Select — has a custom chevron */
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23635A7A' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--sp-3) center;
  padding-right: var(--sp-8);
}

/* Input group — icon + input combos */
.input-group {
  position: relative;
  display: flex;
  align-items: stretch;
}
.input-group .input { padding-left: var(--sp-8); }
.input-group__icon {
  position: absolute;
  left: var(--sp-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-fg-muted);
  pointer-events: none;
  display: flex; align-items: center;
}

/* Checkbox + Radio — custom styled. Hides native input then renders a box. */
.checkbox,
.radio {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-md);
  color: var(--color-fg-default);
  cursor: pointer;
  user-select: none;
}
.checkbox input,
.radio input { position: absolute; opacity: 0; pointer-events: none; }
.checkbox__box,
.radio__box {
  width: 18px; height: 18px;
  border: var(--border-width-2) solid var(--color-border-strong);
  background: var(--color-bg-surface);
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.checkbox__box { border-radius: 4px; }
.radio__box    { border-radius: 50%; }

.checkbox input:checked + .checkbox__box,
.radio input:checked + .radio__box {
  background: var(--brand-500);
  border-color: var(--brand-500);
}
.checkbox input:checked + .checkbox__box::after {
  content: '';
  width: 10px; height: 10px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5L20 7'/%3E%3C/svg%3E") center/contain no-repeat;
}
.radio input:checked + .radio__box::after {
  content: ''; width: 8px; height: 8px; border-radius: 50%; background: #fff;
}
.checkbox input:focus-visible + .checkbox__box,
.radio input:focus-visible + .radio__box { box-shadow: var(--focus-ring); }
.checkbox input[disabled] ~ *,
.radio input[disabled] ~ * { color: var(--color-fg-disabled); }
.checkbox input[disabled] + .checkbox__box,
.radio input[disabled] + .radio__box { background: var(--color-bg-sunken); border-color: var(--color-border-subtle); }

/* Switch — for boolean settings (e.g. "Include other purchasers") */
.switch {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  cursor: pointer; user-select: none;
}
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch__track {
  width: 36px; height: 20px; border-radius: 9999px;
  background: var(--color-border-strong);
  position: relative;
  transition: background var(--dur-fast);
}
.switch__track::after {
  content: '';
  position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-xs);
  transition: transform var(--dur-fast) var(--ease-out);
}
.switch input:checked + .switch__track { background: var(--brand-500); }
.switch input:checked + .switch__track::after { transform: translateX(16px); }
.switch input:focus-visible + .switch__track { box-shadow: var(--focus-ring); }

/* ─── CARD ────────────────────────────────────────────────────────────── */

.card {
  background: var(--color-bg-surface);
  border-radius: var(--radius-lg);
  border: var(--border-width-1) solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card--flat { box-shadow: none; }
.card--elevated { box-shadow: var(--shadow-md); }
.card--inset {
  background: var(--color-bg-sunken);
  border: none;
  box-shadow: none;
}

.card__header {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: var(--border-width-1) solid var(--color-border-subtle);
}
.card__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-snug);
}
.card__body { padding: var(--sp-5); }
.card__footer {
  padding: var(--sp-4) var(--sp-5);
  border-top: var(--border-width-1) solid var(--color-border-subtle);
  background: var(--color-bg-sunken);
}

/* ─── BADGES + PILLS + TAGS ───────────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  height: 20px;
  padding: 0 var(--sp-2);
  border-radius: var(--radius-pill);
  background: var(--color-bg-sunken);
  color: var(--color-fg-secondary);
  font-size: 10.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide);
  white-space: nowrap;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.badge::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
  opacity: 0.65;
  flex-shrink: 0;
}
.badge-success { background: var(--color-success-bg); color: var(--color-success-fg); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning-fg); }
.badge-danger  { background: var(--color-danger-bg);  color: var(--color-danger-fg); }
.badge-info    { background: var(--color-info-bg);    color: var(--color-info-fg); }
.badge-brand   { background: var(--color-action-bg-subtle); color: var(--color-action-fg-on-subtle); }
.badge--solid  { background: var(--ink-800); color: #fff; }
.badge--solid::before { opacity: 0.9; }
.badge--no-dot::before { display: none; }

/* Tag — like badge but with subtle border, used for filters/categories */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1_5);
  height: 24px;
  padding: 0 var(--sp-2_5, 10px);
  border-radius: var(--radius-pill);
  background: var(--color-bg-surface);
  border: var(--border-width-1) solid var(--color-border-default);
  color: var(--color-fg-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  cursor: default;
}
.tag--clickable { cursor: pointer; transition: background var(--dur-fast); }
.tag--clickable:hover { background: var(--color-bg-sunken); }
.tag.is-active { background: var(--ink-800); color: #fff; border-color: var(--ink-800); }
.tag__remove {
  display: inline-flex; align-items: center; justify-content: center;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: transparent;
  border: none;
  color: currentColor;
  cursor: pointer;
  opacity: 0.55;
  padding: 0; margin-right: -4px;
}
.tag__remove:hover { opacity: 1; background: rgba(0,0,0,0.06); }

/* ─── TABLE ───────────────────────────────────────────────────────────── */

/* The inventory app is table-heavy. This implementation:
   - Sticky header
   - Zebra-free (uses borders); easier to scan numbers
   - Tabular-nums for numeric columns
   - Sortable header w/ aria-sort
   - Selectable rows (shift-click range, etc. wired by app code)
   - Virtualization-friendly: no per-row JS or transforms required
*/

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-bg-surface);
  font-size: var(--fs-md);
}
.table thead th {
  position: sticky; top: 0;
  padding: var(--sp-3) var(--sp-4);
  background: var(--color-bg-sunken);
  text-align: left;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-fg-muted);
  border-bottom: var(--border-width-1) solid var(--color-border-default);
  white-space: nowrap;
  z-index: var(--z-sticky);
}
.table th[aria-sort] {
  cursor: pointer;
  user-select: none;
}
.table th[aria-sort]:hover { color: var(--color-fg-secondary); }
.table th[aria-sort]::after {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  margin-left: 6px;
  vertical-align: middle;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%238A809F'%3E%3Cpath d='M7 10l5-5 5 5M7 14l5 5 5-5'/%3E%3C/svg%3E");
  background-size: contain; background-repeat: no-repeat;
  opacity: 0.5;
}
.table th[aria-sort='ascending']::after  { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%237C5CFF'%3E%3Cpath d='M7 14l5-5 5 5z'/%3E%3C/svg%3E"); opacity: 1; }
.table th[aria-sort='descending']::after { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%237C5CFF'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E"); opacity: 1; }

.table td {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: var(--border-width-1) solid var(--color-border-subtle);
  color: var(--color-fg-default);
  vertical-align: middle;
}
.table tr:last-child td { border-bottom: none; }

.table tbody tr { transition: background var(--dur-fast); }
.table tbody tr:hover { background: var(--color-bg-sunken); }
.table tbody tr.is-selected { background: var(--brand-50); }
.table tbody tr[aria-selected='true'] { background: var(--brand-50); }

/* Numeric / mono cells */
.table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.table .col-actions { text-align: right; white-space: nowrap; }

/* Compact density */
.table--compact td { padding: var(--sp-2) var(--sp-4); }

/* ─── TOAST ───────────────────────────────────────────────────────────── */

.toast {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  background: var(--ink-800);
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--fs-md);
  max-width: 380px;
  min-height: 44px;
}
.toast__icon {
  width: 20px; height: 20px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.toast--success { background: var(--success-700); }
.toast--warning { background: var(--warning-700); }
.toast--danger  { background: var(--danger-700);  }
.toast__action {
  margin-left: var(--sp-2);
  padding: var(--sp-1) var(--sp-2);
  background: transparent;
  color: #fff;
  border: var(--border-width-1) solid rgba(255,255,255,0.25);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  cursor: pointer;
}
.toast__action:hover { background: rgba(255,255,255,0.1); }
.toast__close {
  appearance: none; border: 0; background: transparent;
  color: rgba(255,255,255,0.65);
  width: 24px; height: 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.toast__close:hover { background: rgba(255,255,255,0.1); color: #fff; }

/* ─── MODAL + OVERLAY ────────────────────────────────────────────────── */

/* Usage: dialog element preferred for native a11y. Use role="dialog"
   aria-modal="true" aria-labelledby="…" if not using <dialog>. */

.modal-overlay {
  position: fixed; inset: 0;
  background: var(--color-bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-overlay);
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-4);
  animation: modal-fade var(--dur-normal) var(--ease-out);
}

.modal {
  background: var(--color-bg-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  display: flex; flex-direction: column;
  z-index: var(--z-modal);
  animation: modal-pop var(--dur-normal) var(--ease-out);
}
.modal--md { max-width: 640px; }
.modal--lg { max-width: 880px; }

.modal__header {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6) var(--sp-3);
}
.modal__title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-snug);
}
.modal__close {
  appearance: none; border: 0; background: transparent;
  color: var(--color-fg-muted);
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.modal__close:hover { background: var(--color-bg-sunken); color: var(--color-fg-default); }
.modal__close:focus-visible { box-shadow: var(--focus-ring); }
.modal__body {
  padding: 0 var(--sp-6) var(--sp-5);
  overflow-y: auto;
  color: var(--color-fg-secondary);
  line-height: var(--lh-md);
}
.modal__footer {
  display: flex; align-items: center; justify-content: flex-end;
  gap: var(--sp-2);
  padding: var(--sp-4) var(--sp-6) var(--sp-5);
  border-top: var(--border-width-1) solid var(--color-border-subtle);
}
.modal__footer--space-between { justify-content: space-between; }

@keyframes modal-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modal-pop {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ─── DROPDOWN / MENU ─────────────────────────────────────────────────── */

.menu {
  background: var(--color-bg-surface);
  border-radius: var(--radius-md);
  border: var(--border-width-1) solid var(--color-border-subtle);
  box-shadow: var(--shadow-popover);
  padding: var(--sp-1);
  min-width: 180px;
  font-size: var(--fs-md);
}
.menu__item {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  color: var(--color-fg-default);
  cursor: pointer;
  text-decoration: none;
}
.menu__item:hover { background: var(--color-bg-sunken); }
.menu__item:focus-visible { background: var(--color-bg-sunken); box-shadow: var(--focus-ring); }
.menu__item--danger { color: var(--color-danger-fg); }
.menu__item--danger:hover { background: var(--color-danger-bg); }
.menu__divider {
  height: 1px;
  background: var(--color-border-subtle);
  margin: var(--sp-1) 0;
}
.menu__shortcut {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-fg-muted);
}

/* ─── NAV (top + sub-tabs + bottom mobile tabs) ───────────────────────── */

.app-nav {
  position: sticky; top: 0;
  z-index: var(--z-nav);
  height: var(--nav-height-desktop);
  display: flex; align-items: center;
  padding: 0 var(--sp-6);
  background: var(--color-bg-surface);
  border-bottom: var(--border-width-1) solid var(--color-border-subtle);
  gap: var(--sp-6);
}
.app-nav__brand {
  display: flex; align-items: center; gap: var(--sp-2);
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-snug);
  color: var(--color-fg-default);
  text-decoration: none;
}
.app-nav__brand-mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--brand-400), var(--brand-600));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  font-weight: var(--fw-bold);
}
.app-nav__sections {
  display: flex; gap: var(--sp-1); align-items: center;
}
.app-nav__link {
  height: 32px;
  padding: 0 var(--sp-3);
  display: inline-flex; align-items: center; gap: var(--sp-1_5);
  border-radius: var(--radius-sm);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--color-fg-secondary);
  text-decoration: none;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.app-nav__link:hover { background: var(--color-bg-sunken); color: var(--color-fg-default); }
.app-nav__link[aria-current='page'] {
  color: var(--color-fg-default);
  background: var(--color-bg-sunken);
}
.app-nav__spacer { flex: 1; }
.app-nav__actions { display: flex; align-items: center; gap: var(--sp-2); }

/* Sub-nav (Components / Kits / Logs / Scan style row) */
.subnav {
  position: sticky; top: var(--nav-height-desktop);
  z-index: calc(var(--z-nav) - 1);
  height: var(--tabbar-height);
  display: flex; align-items: center;
  padding: 0 var(--sp-6);
  gap: var(--sp-1);
  background: var(--color-bg-page);
  border-bottom: var(--border-width-1) solid var(--color-border-subtle);
}
.subnav__tab {
  position: relative;
  height: calc(var(--tabbar-height) - 1px);
  padding: 0 var(--sp-3);
  display: inline-flex; align-items: center; gap: var(--sp-1_5);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--color-fg-secondary);
  background: transparent;
  border: 0;
  cursor: pointer;
}
.subnav__tab:hover { color: var(--color-fg-default); }
.subnav__tab[aria-current='page'],
.subnav__tab[aria-selected='true'] {
  color: var(--color-fg-default);
  font-weight: var(--fw-semibold);
}
.subnav__tab[aria-current='page']::after,
.subnav__tab[aria-selected='true']::after {
  content: '';
  position: absolute;
  left: var(--sp-3); right: var(--sp-3);
  bottom: -1px;
  height: 2px;
  background: var(--brand-500);
  border-radius: 2px 2px 0 0;
}
.subnav__tab:focus-visible { box-shadow: var(--focus-ring); border-radius: var(--radius-sm); }

/* Bottom tab bar (mobile only) */
.tab-bar {
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: var(--z-nav);
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-top: var(--border-width-1) solid var(--color-border-subtle);
  padding: var(--sp-2) 0 calc(var(--sp-2) + env(safe-area-inset-bottom, 0));
}
.tab-bar__item {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  background: transparent; border: 0;
  color: var(--color-fg-muted);
  font-size: 10px; font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  padding: var(--sp-1) 0;
  text-decoration: none;
  min-height: 44px;
  cursor: pointer;
}
.tab-bar__item[aria-current='page'] { color: var(--color-fg-default); }
.tab-bar__item[aria-current='page'] .tab-bar__icon { color: var(--brand-500); }
.tab-bar__item:focus-visible {
  outline: none;
  background: var(--color-bg-sunken);
  border-radius: var(--radius-sm);
}
@media (prefers-color-scheme: dark) {
  .tab-bar { background: rgba(26, 21, 48, 0.92); }
}

/* ─── BREADCRUMB ──────────────────────────────────────────────────────── */

.crumbs {
  display: flex; align-items: center; gap: var(--sp-1_5);
  font-size: var(--fs-sm);
  color: var(--color-fg-muted);
}
.crumbs a { color: var(--color-fg-secondary); text-decoration: none; }
.crumbs a:hover { color: var(--color-fg-default); text-decoration: underline; }
.crumbs__sep { color: var(--color-fg-muted); font-size: 14px; }
.crumbs__current { color: var(--color-fg-default); font-weight: var(--fw-medium); }

/* ─── PAGINATION ──────────────────────────────────────────────────────── */

.pagination {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--color-fg-secondary);
}
.pagination__btn {
  appearance: none;
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: var(--border-width-1) solid var(--color-border-default);
  background: var(--color-bg-surface);
  color: var(--color-fg-default);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background var(--dur-fast);
}
.pagination__btn:hover { background: var(--color-bg-sunken); }
.pagination__btn[aria-current='page'] {
  background: var(--ink-800); color: #fff; border-color: var(--ink-800);
}
.pagination__btn[disabled] {
  color: var(--color-fg-disabled);
  background: var(--color-bg-sunken);
  pointer-events: none;
}

/* ─── EMPTY STATE ─────────────────────────────────────────────────────── */

.empty {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: var(--sp-12) var(--sp-6);
  gap: var(--sp-3);
  color: var(--color-fg-secondary);
}
.empty__icon {
  width: 64px; height: 64px;
  border-radius: var(--radius-xl);
  background: var(--color-bg-sunken);
  color: var(--color-fg-muted);
  display: flex; align-items: center; justify-content: center;
}
.empty__title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--color-fg-default);
}
.empty__desc {
  max-width: 360px;
  font-size: var(--fs-md);
  line-height: var(--lh-md);
  color: var(--color-fg-secondary);
}

/* ─── LOADING SKELETON ────────────────────────────────────────────────── */

.skeleton {
  background: linear-gradient(90deg,
    var(--color-bg-sunken) 0%,
    var(--ink-150) 50%,
    var(--color-bg-sunken) 100%);
  background-size: 200% 100%;
  border-radius: var(--radius-sm);
  animation: skeleton-shimmer 1.4s var(--ease-in-out) infinite;
}
@keyframes skeleton-shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}
.skeleton--text { height: 12px; }
.skeleton--title { height: 18px; }
.skeleton--block { height: 40px; }
.skeleton--circle { border-radius: 50%; }

/* ─── ALERT / BANNER ──────────────────────────────────────────────────── */

.alert {
  display: flex; align-items: flex-start; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  border: var(--border-width-1) solid;
  font-size: var(--fs-md);
  line-height: var(--lh-md);
}
.alert__icon { flex-shrink: 0; margin-top: 1px; }
.alert__title { font-weight: var(--fw-semibold); }
.alert__body { color: var(--color-fg-secondary); }
.alert-success { background: var(--color-success-bg); color: var(--color-success-fg); border-color: var(--success-100); }
.alert-warning { background: var(--color-warning-bg); color: var(--color-warning-fg); border-color: var(--warning-100); }
.alert-danger  { background: var(--color-danger-bg);  color: var(--color-danger-fg);  border-color: var(--danger-100); }
.alert-info    { background: var(--color-info-bg);    color: var(--color-info-fg);    border-color: var(--info-100); }

/* ─── PROGRESS ────────────────────────────────────────────────────────── */

.progress {
  width: 100%; height: 6px;
  background: var(--color-bg-sunken);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.progress__bar {
  height: 100%;
  background: var(--brand-500);
  border-radius: var(--radius-pill);
  transition: width var(--dur-normal) var(--ease-out);
}
.progress--success .progress__bar { background: var(--success-500); }
.progress--warning .progress__bar { background: var(--warning-500); }
.progress--danger  .progress__bar { background: var(--danger-500); }

/* ─── TOOLTIP ─────────────────────────────────────────────────────────── */

.tooltip {
  position: absolute;
  z-index: var(--z-tooltip);
  background: var(--ink-800);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  padding: var(--sp-1_5) var(--sp-2);
  border-radius: var(--radius-sm);
  pointer-events: none;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

/* ─── CHIP (filter chip — close to .tag but with icon support) ───────── */

.chip {
  display: inline-flex; align-items: center; gap: var(--sp-1_5);
  height: 28px;
  padding: 0 var(--sp-3);
  border-radius: var(--radius-pill);
  background: var(--color-bg-surface);
  border: var(--border-width-1) solid var(--color-border-default);
  color: var(--color-fg-secondary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.chip:hover { background: var(--color-bg-sunken); }
.chip.is-active {
  background: var(--ink-800);
  color: #fff;
  border-color: var(--ink-800);
}
.chip__dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.chip__count {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  background: rgba(0,0,0,0.08);
  padding: 1px 5px;
  border-radius: var(--radius-pill);
  margin-left: var(--sp-1);
}
.chip.is-active .chip__count { background: rgba(255,255,255,0.15); }
.chip:focus-visible { box-shadow: var(--focus-ring); }

/* ─── SEGMENTED CONTROL ──────────────────────────────────────────────── */

.segmented {
  display: inline-flex;
  padding: 2px;
  background: var(--color-bg-sunken);
  border-radius: var(--radius-md);
  border: var(--border-width-1) solid var(--color-border-subtle);
}
.segmented__btn {
  appearance: none; border: 0;
  background: transparent;
  height: 28px;
  padding: 0 var(--sp-3);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-fg-secondary);
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.segmented__btn[aria-pressed='true'] {
  background: var(--color-bg-surface);
  color: var(--color-fg-default);
  box-shadow: var(--shadow-xs);
}
.segmented__btn:hover { color: var(--color-fg-default); }
.segmented__btn:focus-visible { box-shadow: var(--focus-ring); }

/* ─── KBD ─────────────────────────────────────────────────────────────── */

kbd, .kbd {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 20px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--fw-semibold);
  color: var(--color-fg-secondary);
  background: var(--color-bg-surface);
  border: var(--border-width-1) solid var(--color-border-default);
  border-bottom-width: 2px;
  border-radius: var(--radius-xs);
  line-height: 18px;
}

/* ─── DIVIDER ─────────────────────────────────────────────────────────── */

.divider {
  height: 1px;
  background: var(--color-border-subtle);
  margin: var(--sp-4) 0;
  border: 0;
}
.divider--strong { background: var(--color-border-default); }