/* ==========================================================================
   车镜 CarMirror · components.css
   通用玻璃组件、Bento 功能网格与可访问的微交互。
   玻璃和状态色继承 base.css 令牌，组件保持 8px 圆角。
   ========================================================================== */

/* ==========================================================================
   Appbar / Tabbar
   ========================================================================== */

.appbar {
  height: var(--appbar-h);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0 var(--sp-4);
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
}

.appbar-title {
  flex: 1;
  min-width: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.appbar-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex: none;
}

.tabbar {
  height: var(--tabbar-h);
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border-top: 1px solid var(--border);
  background-color: var(--bg);
}

.tabbar[hidden] { display: none; }

.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  font-size: 0.6875rem;
  color: var(--fg-subtle);
  transition: color 0.15s ease;
}

.tab svg { width: 1.25rem; height: 1.25rem; }
.tab[aria-current="page"] { color: var(--accent); }

/* ==========================================================================
   Button
   统一几何，沿用原有主操作、次操作与危险操作的颜色语义。
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  height: 2.25rem;                  /* h-9 */
  padding: 0 var(--sp-4);
  border-radius: var(--radius);     /* 0.5rem */
  border: 1px solid var(--border);
  background-color: transparent;
  color: var(--fg);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease,
              border-color var(--dur-fast) ease;
}

.btn svg { width: 1rem; height: 1rem; flex: none; }

.btn:disabled,
.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
}

/* 变体：几何与底色一律继承基础态，只换文字与描边颜色 */

/* 主操作：强调色描边 + 强调色文字，无填充 */
.btn-primary { border-color: var(--accent); color: var(--accent); }

/* 基础态的显式别名，供既有标记沿用 */
.btn-outline { border-color: var(--border); color: var(--fg); }

/* 次操作：弱化文字，描边不变 */
.btn-secondary { color: var(--fg-muted); }

/* 幽灵：去掉描边，用于工具栏与列表内的轻量操作 */
.btn-ghost { border-color: transparent; color: var(--fg-muted); }

/* 破坏性操作 */
.btn-destructive { border-color: var(--danger); color: var(--danger); }

/* 纯文字 */
.btn-link {
  height: auto;
  padding: 0;
  border-color: transparent;
  color: var(--accent);
  text-underline-offset: 4px;
}

/* 尺寸 */
.btn-sm   { height: 2rem;    padding: 0 var(--sp-3); font-size: 0.8125rem; }
.btn-lg   { height: 2.5rem;  padding: 0 var(--sp-8); }
.btn-icon { width: 2.25rem;  padding: 0; }
.btn-icon.btn-sm { width: 2rem; }

.btn-block { width: 100%; }

.btn-group { display: flex; gap: var(--sp-3); }
.btn-group > .btn { flex: 1; }

/* ==========================================================================
   Card
   ========================================================================== */

.card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.card-header {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-6) var(--sp-6) 0;
}

.card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
}

.card-description {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--fg-muted);
}

.card-content { padding: var(--sp-6); }
.card-header + .card-content { padding-top: var(--sp-4); }

.card-footer {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0 var(--sp-6) var(--sp-6);
}

/* 可点击卡片 */
.card-action {
  width: 100%;
  text-align: left;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

/* ==========================================================================
   Form
   ========================================================================== */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.label {
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1;
  color: var(--fg);
}

.label .req { color: var(--danger); margin-left: 2px; }

.input,
.textarea,
.select {
  width: 100%;
  height: 2.25rem;
  padding: 0 var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: transparent;
  color: var(--fg);
  font-size: 0.875rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

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

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring);
}

.input:disabled,
.textarea:disabled,
.select:disabled { opacity: 0.5; cursor: not-allowed; }

.input[aria-invalid="true"],
.textarea[aria-invalid="true"] { border-color: var(--danger); }

.textarea {
  height: auto;
  min-height: 5.5rem;
  padding: var(--sp-2) var(--sp-3);
  line-height: 1.6;
  resize: vertical;
}

.select {
  appearance: none;
  padding-right: var(--sp-8);
}

/* 下拉箭头用纯 CSS 边框拼，与 .accordion 的箭头同一种写法。
   原先是内嵌 data-URI SVG，其 stroke 只能写死十六进制 —— 那是全站唯一
   不跟随令牌的色值，换配色时会落单。 */
.select-wrap { position: relative; display: block; }

.select-wrap::after {
  content: "";
  position: absolute;
  right: var(--sp-3);
  top: 50%;
  width: 0.4rem;
  height: 0.4rem;
  margin-top: -0.3rem;
  border-right: 1.5px solid var(--fg-muted);
  border-bottom: 1.5px solid var(--fg-muted);
  transform: rotate(45deg);
  pointer-events: none;
}

.select option { background-color: var(--card); color: var(--fg); }

.field-hint { font-size: 0.75rem; color: var(--fg-subtle); }
.field-error { font-size: 0.75rem; color: var(--danger); }

/* Checkbox / Radio */
.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--fg-muted);
  cursor: pointer;
}

.checkbox-row input {
  flex: none;
  width: 1rem;
  height: 1rem;
  margin-top: 0.125rem;
  accent-color: var(--accent);
  cursor: pointer;
}

/* Switch */
.switch {
  position: relative;
  flex: none;
  width: 2.25rem;
  height: 1.25rem;
}

.switch input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.switch-track {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background-color: var(--muted-bg);
  transition: background-color 0.15s ease;
  pointer-events: none;
}

.switch-track::after {
  content: "";
  position: absolute;
  top: 0.125rem;
  left: 0.125rem;
  width: 1rem;
  height: 1rem;
  border-radius: var(--radius-full);
  background-color: var(--fg);
  transition: transform 0.15s ease;
}

.switch input:checked + .switch-track { background-color: var(--accent); }
.switch input:checked + .switch-track::after { transform: translateX(1rem); }
.switch input:focus-visible + .switch-track { box-shadow: 0 0 0 3px var(--ring); }

/* ==========================================================================
   Badge
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 0.125rem var(--sp-2);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
  white-space: nowrap;
}

.badge-default   { background-color: var(--muted-bg); color: var(--fg-muted); }
.badge-outline   { border-color: var(--border); color: var(--fg-muted); }
.badge-accent    { background-color: var(--accent-soft); color: var(--accent); }
.badge-ok        { background-color: var(--ok-soft);     color: var(--ok); }
.badge-warn      { background-color: var(--warn-soft);   color: var(--warn); }
.badge-danger    { background-color: var(--danger-soft); color: var(--danger); }

/* 圆点状态指示 */
.dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: var(--radius-full);
  background-color: currentColor;
  flex: none;
}

/* ==========================================================================
   Chip（可切换标签，用于故障灯筛选 / 症状标签）
   ========================================================================== */

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background-color: transparent;
  color: var(--fg-muted);
  font-size: 0.8125rem;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.chip[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--accent-soft);
}

.chip-row { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

/* ==========================================================================
   Alert
   ========================================================================== */

.alert {
  display: flex;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--card);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--fg-muted);
}

.alert svg { width: 1rem; height: 1rem; flex: none; margin-top: 0.125rem; }

.alert-title {
  font-weight: 600;
  color: var(--fg);
  margin-bottom: var(--sp-1);
}

.alert-accent { border-color: var(--accent-line); }
.alert-accent > svg { color: var(--accent); }
.alert-warn   { border-color: var(--warn-line); }
.alert-warn > svg { color: var(--warn); }
.alert-danger { border-color: var(--danger-line); }
.alert-danger > svg { color: var(--danger); }
.alert-danger .alert-title { color: var(--danger); }

/* 安全红线卡：强调色只用于描边、图标、标题文字，不做大色块填充 */
.safety-card {
  border: 1px solid var(--danger);
  border-radius: var(--radius-lg);
  background-color: var(--card);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.safety-head {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 1rem;
  font-weight: 600;
  color: var(--danger);
}

.safety-head svg { width: 1.25rem; height: 1.25rem; flex: none; }

.safety-steps {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  counter-reset: step;
}

.safety-steps li {
  display: flex;
  gap: var(--sp-3);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--fg);
  counter-increment: step;
}

.safety-steps li::before {
  content: counter(step);
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--danger);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--danger);
}

/* 免责 / 效度声明 */
.disclaimer {
  padding-left: var(--sp-3);
  border-left: 2px solid var(--border-strong);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--fg-subtle);
}

/* ==========================================================================
   Separator
   ========================================================================== */

.separator {
  height: 1px;
  border: 0;
  background-color: var(--border);
}

.separator-v { width: 1px; height: auto; align-self: stretch; }

/* ==========================================================================
   List
   ========================================================================== */

.list {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--card);
  overflow: visible;
}

.list-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  padding: var(--sp-4);
  text-align: left;
  background-color: transparent;
  transition: background-color 0.15s ease;
}

.list-item + .list-item { border-top: 1px solid var(--border); }
.list-item:first-child { border-radius: var(--radius) var(--radius) 0 0; }
.list-item:last-child { border-radius: 0 0 var(--radius) var(--radius); }
.list-item:only-child { border-radius: var(--radius); }

.list-item-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.list-item-title { font-size: 0.875rem; font-weight: 500; }
.list-item-sub   { font-size: 0.75rem; color: var(--fg-subtle); }
.list-item-meta  { flex: none; display: flex; align-items: center; gap: var(--sp-2); }
.list-item-arrow { flex: none; color: var(--fg-faint); width: 1rem; height: 1rem; }

/* ==========================================================================
   Avatar
   ========================================================================== */

.avatar {
  flex: none;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--muted-bg);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg-muted);
}

.avatar-sm { width: 2rem;   height: 2rem;   font-size: 0.75rem; }
.avatar-lg { width: 3.5rem; height: 3.5rem; font-size: 1.125rem; }
.avatar-accent { border-color: var(--accent-line); color: var(--accent); }

/* ==========================================================================
   Bento 功能网格
   ========================================================================== */

.grid8 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 88px;
  gap: 12px;
}

.grid8-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--card);
  color: var(--fg-muted);
  font-size: 0.75rem;
  text-align: center;
  line-height: 1.5;
  overflow-wrap: anywhere;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.grid8-cell svg { width: 1.375rem; height: 1.375rem; flex: none; }

.grid8-cell:first-child {
  grid-column: span 2;
  grid-row: span 2;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--sp-5);
  color: var(--fg);
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  border-color: var(--accent-line);
  background-image: linear-gradient(135deg, var(--accent-soft), transparent 78%);
}

.grid8-cell:first-child svg { width: 2.75rem; height: 2.75rem; }
.grid8-cell:nth-child(7) {
  grid-column: span 2;
  flex-direction: row;
  justify-content: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  text-align: left;
  font-size: 0.8125rem;
}

@media (max-width: 520px) {
  .grid8 { grid-auto-rows: 80px; }
}

.grid8-cell[data-primary="true"] { color: var(--fg); }
.grid8-cell[data-primary="true"] svg { color: var(--accent); }

/* ==========================================================================
   Metric / Stat
   ========================================================================== */

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(6rem, 1fr));
  gap: var(--sp-3);
}

.metric {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--card);
}

.metric-label { font-size: 0.6875rem; color: var(--fg-subtle); }

.metric-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
}

.metric-unit {
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--fg-subtle);
  margin-left: 2px;
}

/* Progress / Bar */
.progress {
  height: 0.375rem;
  border-radius: var(--radius-full);
  background-color: var(--muted-bg);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background-color: currentColor;
  transition: width 0.35s ease;
}

.meter-row { display: flex; align-items: center; gap: var(--sp-3); }
.meter-row .meter-name {
  flex: none;
  width: 5rem;
  font-size: 0.75rem;
  color: var(--fg-muted);
}
.meter-row .progress { flex: 1; }
.meter-row .meter-value {
  flex: none;
  width: 2rem;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
}

/* ==========================================================================
   Tabs
   ========================================================================== */

.tabs {
  display: inline-flex;
  gap: var(--sp-1);
  padding: var(--sp-1);
  border-radius: var(--radius);
  background-color: var(--card);
  border: 1px solid var(--border);
}

.tabs-trigger {
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--fg-subtle);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.tabs-trigger[aria-selected="true"] {
  background-color: var(--muted-bg);
  color: var(--fg);
}

.tabs-block { display: flex; width: 100%; }
.tabs-block .tabs-trigger { flex: 1; text-align: center; }

/* ==========================================================================
   Accordion（报告页「本报告是怎么算出来的」）
   ========================================================================== */

.accordion {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--card);
  overflow: visible;
}

.accordion + .accordion { margin-top: var(--sp-2); }

.accordion > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--fg-muted);
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius);
  transition: color 0.15s ease;
}

.accordion > summary::-webkit-details-marker { display: none; }

.accordion > summary::after {
  content: "";
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.15s ease;
}

.accordion[open] > summary::after { transform: rotate(-135deg) translate(-2px, -2px); }

.accordion-body {
  padding: 0 var(--sp-4) var(--sp-4);
  font-size: 0.75rem;
  line-height: 1.75;
  color: var(--fg-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

/* ==========================================================================
   Table
   ========================================================================== */

.table { width: 100%; border-collapse: collapse; font-size: 0.8125rem; }

.table th,
.table td {
  padding: var(--sp-2) var(--sp-3);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table th {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0;
}

.table td { color: var(--fg-muted); }
.table tr:last-child td { border-bottom: none; }

/* ==========================================================================
   Dialog
   ========================================================================== */

.modal-host {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: var(--sp-6);
  background-color: var(--overlay);
}

.modal {
  width: 100%;
  max-width: 24rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--card);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-6);
  animation: modal-in 0.15s ease-out;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.96); }
}

.modal-title { font-size: 1rem; font-weight: 600; letter-spacing: 0; }
.modal-body  { font-size: 0.8125rem; line-height: 1.7; color: var(--fg-muted); }
.modal-footer { display: flex; gap: var(--sp-3); }
.modal-footer .btn { flex: 1; }

/* 演示验证码 */
.code-display {
  padding: var(--sp-4);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0;
  text-align: center;
  color: var(--accent);
}

/* ==========================================================================
   Toast
   ========================================================================== */

.toast-host {
  position: fixed;
  left: 50%;
  bottom: var(--sp-8);
  transform: translateX(-50%);
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  max-width: 88vw;
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--card);
  box-shadow: var(--shadow-lg);
  font-size: 0.8125rem;
  color: var(--fg);
  animation: toast-in 0.18s ease-out;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(0.5rem); }
}

.toast svg { width: 1rem; height: 1rem; flex: none; }
.toast-ok svg     { color: var(--ok); }
.toast-error svg  { color: var(--danger); }

/* ==========================================================================
   Chat（智能问诊）
   ========================================================================== */

.chat-log {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.msg { display: flex; gap: var(--sp-2); max-width: 90%; }
.msg-bot  { align-self: flex-start; }
.msg-user { align-self: flex-end; flex-direction: row-reverse; }

.bubble {
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--card);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.msg-user .bubble {
  border-color: var(--accent-line);
  color: var(--fg);
}

.bubble-foot {
  margin-top: var(--sp-2);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--border);
  font-size: 0.6875rem;
  color: var(--fg-faint);
}

.chat-composer {
  position: sticky;
  bottom: 0;
  display: flex;
  gap: var(--sp-2);
  padding-top: var(--sp-3);
  background-color: var(--bg);
}

.chat-composer .input { flex: 1; }

.typing { display: inline-flex; align-items: center; gap: var(--sp-1); height: 1rem; }
.typing i {
  width: 0.25rem;
  height: 0.25rem;
  border-radius: var(--radius-full);
  background-color: var(--fg-subtle);
  animation: typing-blink 1.2s infinite;
}
.typing i:nth-child(2) { animation-delay: 0.2s; }
.typing i:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-blink {
  0%, 60%, 100% { opacity: 0.25; }
  30%           { opacity: 1; }
}

/* ==========================================================================
   Skeleton / Empty
   ========================================================================== */

.skeleton {
  border-radius: var(--radius-sm);
  background-color: var(--muted-bg);
  animation: skeleton-pulse 1.6s ease-in-out infinite;
}

@keyframes skeleton-pulse {
  50% { opacity: 0.5; }
}

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-12) var(--sp-6);
  text-align: center;
  color: var(--fg-subtle);
  font-size: 0.8125rem;
}

.empty svg { width: 1.75rem; height: 1.75rem; color: var(--fg-faint); }

/* ==========================================================================
   Glass surfaces
   Opaque defaults keep the interface readable without backdrop-filter.
   ========================================================================== */

:is(.appbar, .tabbar, .card, .list, .grid8-cell, .metric, .tabs,
    .accordion, .modal, .toast, .bubble) {
  background-color: var(--card);
  background-image: var(--glass-highlight);
  box-shadow: var(--glass-shadow);
}

:is(.card, .list, .grid8-cell, .metric, .tabs, .accordion, .modal,
    .toast, .bubble, .safety-card) {
  border-radius: var(--radius);
}

.grid8-cell:first-child {
  background-image: linear-gradient(135deg, var(--accent-soft), transparent 78%),
                    var(--glass-highlight);
}

.appbar, .tabbar { position: relative; z-index: 3; }
.tab { border-radius: var(--radius); }
.tab[aria-current="page"] { background-color: var(--accent-soft); }

:is(.input, .textarea, .select) { background-color: var(--bg-subtle); }
.btn:not(.btn-link):not(.btn-ghost) { background-image: var(--glass-highlight); }
.btn-primary { background-color: var(--accent-soft); }
.alert, .safety-card { background-image: var(--glass-highlight); }

@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  :is(.appbar, .tabbar, .card, .list, .grid8-cell, .metric, .tabs,
      .accordion, .modal, .toast, .bubble) {
    background-color: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
  }

  :is(.appbar, .tabbar, .modal, .toast, .alert, .safety-card, .chat-composer) {
    background-color: var(--glass-strong);
  }

  :is(.input, .textarea, .select) { background-color: var(--glass-strong); }

  :is(.card, .dashboard, .question, .vehicle-card, .chart-block, .tech-card,
      .post, .modal, .list, .accordion)
  :is(.card, .list, .metric, .tabs, .accordion, .bubble) {
    background-color: var(--glass-strong);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    box-shadow: inset 0 1px 0 rgb(231 253 255 / .04);
  }
}

/* ==========================================================================
   Micro-interactions
   Independent scale leaves the scroll-reveal translate untouched.
   ========================================================================== */

:is(button, a[href], summary, [role="button"], .input, .textarea, .select,
    .checkbox-row:has(input:not(:disabled)), .switch:has(input:not(:disabled))):not(:disabled, [disabled], [aria-disabled="true"], [readonly]) {
  transition: scale 180ms var(--ease), box-shadow 180ms ease,
              background-color 180ms ease, border-color 180ms ease,
              color 180ms ease;
}

:is(a[href], button, [role="button"]):is(.grid8-cell, .list-item, .card-action,
    .tech-card, .package, .option, .promo),
:is(.input, .textarea, .select), .accordion > summary, .checkbox-row {
  --micro-scale: 1.01;
}

a[href]:not([class]) { display: inline-block; border-radius: var(--radius-sm); }
.checkbox-row { border-radius: var(--radius-sm); }
.switch { display: inline-block; border-radius: var(--radius-full); }

@media (hover: hover) and (pointer: fine) {
  :is(button, a[href], summary, [role="button"], .input, .textarea, .select,
      .checkbox-row:has(input:not(:disabled)), .switch:has(input:not(:disabled))):not(:disabled, [disabled], [aria-disabled="true"], [readonly]):hover {
    scale: var(--micro-scale, 1.02);
    box-shadow: var(--glass-hover-shadow);
  }

  .btn:not(:disabled, [disabled], [aria-disabled="true"]):hover {
    background-color: var(--card-hover);
    border-color: var(--border-strong);
  }
  .btn-primary:not(:disabled, [disabled], [aria-disabled="true"]):hover {
    background-color: var(--accent-soft);
    border-color: var(--accent);
  }
  .btn-destructive:not(:disabled, [disabled], [aria-disabled="true"]):hover {
    background-color: var(--danger-soft);
    border-color: var(--danger);
  }
  .btn-link:not(:disabled, [disabled], [aria-disabled="true"]):hover {
    background-color: transparent;
    border-color: transparent;
    text-decoration: underline;
  }
  :is(.btn-secondary, .btn-ghost):not(:disabled, [disabled], [aria-disabled="true"]):hover {
    color: var(--fg);
  }
  :is(a[href], button):is(.card-action, .grid8-cell):not(:disabled, [aria-disabled="true"]):hover {
    border-color: var(--border-strong);
    color: var(--fg);
  }
  :is(a[href], button).list-item:not(:disabled, [aria-disabled="true"]):hover {
    background-color: var(--card-hover);
  }
  .chip:not(:disabled, [aria-disabled="true"]):hover {
    color: var(--fg);
    border-color: var(--border-strong);
  }
  .chip[aria-pressed="true"]:hover { border-color: var(--accent); color: var(--accent); }
  :is(.tab, .tabs-trigger):not(:disabled, [aria-disabled="true"]):hover {
    color: var(--fg);
  }
  .tab[aria-current="page"]:hover { color: var(--accent); }
  .accordion > summary:hover { color: var(--fg); }
  :is(.input, .textarea, .select):not(:disabled):not([readonly]):not([aria-disabled="true"]):focus {
    scale: 1;
    box-shadow: 0 0 0 3px var(--ring);
  }
}

:is(button, a[href], summary, [role="button"], .checkbox-row:has(input:not(:disabled)),
    .switch:has(input:not(:disabled))):not(:disabled, [disabled], [aria-disabled="true"]):active {
  scale: .99;
}

.checkbox-row:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  :is(button, a[href], summary, [role="button"], .input, .textarea, .select,
      .checkbox-row, .switch):not(:disabled, [disabled], [aria-disabled="true"]):is(:hover, :active) {
    scale: 1 !important;
  }
}