:root {
  --background: 0 0% 100%;
  --foreground: 222.2 84% 4.9%;
  --card: 0 0% 100%;
  --card-foreground: 222.2 84% 4.9%;
  --primary: 222.2 47.4% 11.2%;
  --primary-foreground: 210 40% 98%;
  --secondary: 210 40% 96.1%;
  --secondary-foreground: 222.2 47.4% 11.2%;
  --muted: 210 40% 96.1%;
  --muted-foreground: 215.4 16.3% 46.9%;
  --accent: 210 40% 96.1%;
  --accent-foreground: 222.2 47.4% 11.2%;
  --destructive: 0 84.2% 60.2%;
  --success: 142 71% 45%;
  --warning: 38 92% 50%;
  --border: 214.3 31.8% 91.4%;
  --input: 214.3 31.8% 91.4%;
  --ring: 222.2 84% 4.9%;
  --radius: 0.75rem;
  --sidebar-width: 264px;
  --sidebar-collapsed-width: 72px;
  --right-width: 336px;
  --header-height: 3.75rem;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: hsl(var(--foreground));
  background: hsl(var(--background));
  font-family: "Inter", "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body.aivi-shadcn-body {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

svg {
  width: 1rem;
  height: 1rem;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: hsl(var(--border));
  border-radius: 999px;
}

.aivi-mobile-backdrop {
  display: none;
}

.aivi-shadcn-app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--right-width);
  height: 100vh;
  width: 100%;
  transition: grid-template-columns .22s ease;
}

body.aivi-sidebar-collapsed .aivi-shadcn-app {
  grid-template-columns: var(--sidebar-collapsed-width) minmax(0, 1fr) var(--right-width);
}

body.aivi-right-hidden .aivi-shadcn-app {
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) 0;
}

body.aivi-sidebar-collapsed.aivi-right-hidden .aivi-shadcn-app {
  grid-template-columns: var(--sidebar-collapsed-width) minmax(0, 1fr) 0;
}

.aivi-btn {
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 0 .875rem;
  border-radius: calc(var(--radius) - 4px);
  font-size: .875rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color .18s, color .18s, border-color .18s, opacity .18s;
}

.aivi-btn-primary {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.aivi-btn-primary:hover {
  opacity: .9;
}

.aivi-btn-outline {
  border: 1px solid hsl(var(--input));
  background: hsl(var(--background));
  color: hsl(var(--foreground));
}

.aivi-btn-outline:hover,
.aivi-btn-ghost:hover {
  background: hsl(var(--accent));
  color: hsl(var(--accent-foreground));
}

.aivi-btn-ghost {
  color: hsl(var(--foreground));
}

.aivi-btn-icon {
  width: 2.25rem;
  padding: 0;
}

.aivi-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid hsl(var(--border));
  padding: .125rem .5rem;
  font-size: .7rem;
  line-height: 1rem;
  font-weight: 600;
  color: hsl(var(--foreground));
  background: hsl(var(--background));
}

.aivi-badge-primary {
  border-color: transparent;
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.aivi-badge-muted {
  background: hsl(var(--muted));
  color: hsl(var(--muted-foreground));
}

.aivi-card {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--card));
  color: hsl(var(--card-foreground));
  box-shadow: 0 1px 2px rgb(15 23 42 / .04);
}

.aivi-card-header {
  display: flex;
  flex-direction: column;
  gap: .375rem;
  padding: 1rem 1rem .75rem;
}

.aivi-card-title {
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.2;
}

.aivi-card-description {
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
}

.aivi-card-content {
  padding: 0 1rem 1rem;
}

.aivi-sidebar {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-right: 1px solid hsl(var(--border));
  background: hsl(var(--background));
}

.aivi-sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: .625rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid hsl(var(--border));
  position: relative;
}

.aivi-brand-icon {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: .55rem;
  border: 1px solid hsl(var(--border));
  background: hsl(var(--muted));
  flex: 0 0 auto;
}

.aivi-brand-title {
  min-width: 0;
}

.aivi-brand-title strong {
  display: block;
  font-size: .95rem;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.1;
}

.aivi-brand-title span {
  display: block;
  margin-top: .15rem;
  color: hsl(var(--muted-foreground));
  font-size: .72rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aivi-sidebar-collapse-btn {
  margin-left: auto;
}

.aivi-collapsed-only {
  display: none;
}

body.aivi-sidebar-collapsed .aivi-expanded-only {
  display: none !important;
}

body.aivi-sidebar-collapsed .aivi-collapsed-only {
  display: inline-flex;
}

.aivi-sidebar-body {
  flex: 1;
  overflow-y: auto;
  padding: .875rem;
}

.aivi-nav-group + .aivi-nav-group {
  margin-top: 1.25rem;
}

.aivi-nav-label {
  margin: 0 0 .375rem .5rem;
  color: hsl(var(--muted-foreground));
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.aivi-nav-link {
  display: flex;
  align-items: center;
  gap: .7rem;
  width: 100%;
  min-height: 2.25rem;
  padding: .5rem .65rem;
  border: 0;
  border-radius: calc(var(--radius) - 4px);
  background: transparent;
  color: hsl(var(--foreground));
  font-size: .875rem;
  font-weight: 600;
  font-family: inherit;
  text-align: left;
  transition: background-color .18s, color .18s;
  cursor: pointer;
}

.aivi-nav-link > span:not(.count) {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.25;
}

.aivi-nav-link svg {
  color: hsl(var(--muted-foreground));
  flex: 0 0 auto;
}

.aivi-nav-link:hover,
.aivi-nav-link.active {
  background: hsl(var(--accent));
  color: hsl(var(--accent-foreground));
}

.aivi-nav-link:hover svg,
.aivi-nav-link.active svg {
  color: hsl(var(--foreground));
}

.aivi-nav-link .count {
  margin-left: auto;
  flex: 0 0 auto;
  font-size: .68rem;
  line-height: 1;
  padding: .2rem .4rem;
}

.aivi-nav-link-disabled,
.aivi-nav-link-disabled:hover {
  color: hsl(var(--muted-foreground));
  background: transparent;
  cursor: not-allowed;
  opacity: .72;
}

.aivi-nav-link-disabled svg,
.aivi-nav-link-disabled:hover svg {
  color: hsl(var(--muted-foreground));
}

.aivi-sidebar-footer {
  padding: .875rem;
  border-top: 1px solid hsl(var(--border));
}

.aivi-user-menu {
  display: flex;
  align-items: center;
  gap: .75rem;
  width: 100%;
  padding: .5rem;
  border-radius: calc(var(--radius) - 4px);
}

.aivi-user-menu:hover {
  background: hsl(var(--accent));
}

.aivi-avatar {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: hsl(var(--muted));
  color: hsl(var(--foreground));
  font-size: .75rem;
  font-weight: 800;
  flex: 0 0 auto;
}

.aivi-user-copy {
  min-width: 0;
  text-align: left;
}

.aivi-user-copy strong,
.aivi-user-copy span {
  display: block;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.aivi-user-copy strong {
  font-size: .82rem;
  font-weight: 700;
}

.aivi-user-copy span {
  color: hsl(var(--muted-foreground));
  font-size: .72rem;
}

body.aivi-sidebar-collapsed .aivi-sidebar-header {
  justify-content: center;
  padding: 0 .875rem;
}

body.aivi-sidebar-collapsed .aivi-brand-title,
body.aivi-sidebar-collapsed .aivi-nav-label,
body.aivi-sidebar-collapsed .aivi-nav-link span,
body.aivi-sidebar-collapsed .aivi-nav-link .count,
body.aivi-sidebar-collapsed .aivi-user-copy,
body.aivi-sidebar-collapsed .aivi-user-menu > svg,
body.aivi-sidebar-collapsed .aivi-sidebar-footer .aivi-expanded-only {
  display: none;
}

body.aivi-sidebar-collapsed .aivi-sidebar-body {
  padding: .75rem .5rem;
}

body.aivi-sidebar-collapsed .aivi-nav-link {
  justify-content: center;
  gap: 0;
  padding: .625rem;
}

body.aivi-sidebar-collapsed .aivi-nav-group + .aivi-nav-group {
  margin-top: .75rem;
  padding-top: .75rem;
  border-top: 1px solid hsl(var(--border));
}

body.aivi-sidebar-collapsed .aivi-user-menu {
  justify-content: center;
  padding: .5rem;
}

body.aivi-sidebar-collapsed .aivi-sidebar-collapse-btn {
  position: absolute;
  top: .75rem;
  right: -.875rem;
  z-index: 5;
  background: hsl(var(--background));
  box-shadow: 0 1px 2px rgb(0 0 0 / .08);
}

.aivi-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  background: hsl(var(--background));
}

.aivi-topbar {
  height: var(--header-height);
  display: grid;
  grid-template-columns: minmax(120px, .7fr) auto minmax(190px, 1fr);
  align-items: center;
  gap: .75rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid hsl(var(--border));
  min-width: 0;
}

.aivi-mobile-open {
  display: none;
}

.aivi-breadcrumbs {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: hsl(var(--muted-foreground));
  min-width: 0;
  font-size: .875rem;
}

.aivi-breadcrumbs .current {
  color: hsl(var(--foreground));
  font-weight: 600;
}

.aivi-topnav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .25rem;
  padding: .25rem;
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) + 2px);
  background: hsl(var(--muted));
  min-width: 0;
}

.aivi-topnav-link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  min-height: 2rem;
  padding: 0 .75rem;
  border-radius: calc(var(--radius) - 5px);
  color: hsl(var(--muted-foreground));
  font-size: .8125rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color .18s, color .18s, box-shadow .18s;
}

.aivi-topnav-link:hover {
  color: hsl(var(--foreground));
}

.aivi-topnav-link.active {
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  box-shadow: 0 1px 2px rgb(0 0 0 / .05);
}

.aivi-top-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: .5rem;
  min-width: 0;
  flex-shrink: 0;
  justify-self: end;
  max-width: 100%;
  white-space: nowrap;
}

.aivi-auth-pill {
  flex: 0 1 auto;
  max-width: 10rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.aivi-auth-button {
  flex: 0 0 auto;
  min-width: 4.75rem;
}

.aivi-header-optional {
  flex: 0 0 auto;
}

.aivi-workspace {
  flex: 1;
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 0;
  overflow-y: auto;
  background:
    linear-gradient(to bottom, hsl(var(--muted) / .35), hsl(var(--background)) 220px);
}

.aivi-workspace-head {
  padding: 1.25rem 1.5rem 0;
}

.aivi-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.aivi-page-title h1 {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.2;
}

.aivi-page-title p {
  margin: .35rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: .875rem;
}

.aivi-mode-tabs {
  display: inline-flex;
  gap: .25rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted));
  padding: .25rem;
}

.aivi-mode-tab {
  height: 2rem;
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border-radius: calc(var(--radius) - 5px);
  padding: 0 .75rem;
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
  font-weight: 600;
}

.aivi-mode-tab.active {
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  box-shadow: 0 1px 2px rgb(0 0 0 / .04);
}

.aivi-learning-tabs-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: .9rem;
  overflow-x: auto;
}

.aivi-learning-tabs {
  flex-wrap: wrap;
  width: auto;
  max-width: 100%;
  padding: .25rem;
  border-radius: 999px;
  background: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  box-shadow: 0 1px 2px rgb(15 23 42 / .04);
}

.aivi-learning-tabs .aivi-mode-tab {
  min-height: 2.15rem;
  height: auto;
  padding: .45rem .85rem;
  border-radius: 999px;
  white-space: nowrap;
}

.aivi-learning-tabs .aivi-mode-tab.active {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  box-shadow: 0 8px 18px rgb(15 23 42 / .12);
}

.aivi-command-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .75rem;
  margin-bottom: 1rem;
}

.aivi-command-card {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-height: 3.25rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--card));
  padding: .75rem;
  box-shadow: 0 1px 2px rgb(0 0 0 / .035);
}

.aivi-command-card:hover {
  background: hsl(var(--accent));
}

.aivi-command-icon {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: calc(var(--radius) - 4px);
  background: hsl(var(--muted));
  color: hsl(var(--muted-foreground));
  flex: 0 0 auto;
}

.aivi-command-card strong {
  display: block;
  font-size: .82rem;
  font-weight: 700;
}

.aivi-command-card span span {
  display: block;
  color: hsl(var(--muted-foreground));
  font-size: .72rem;
}

.aivi-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .75rem;
}

.aivi-home-stats {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.aivi-stat-card {
  padding: .875rem;
}

.aivi-stat-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .7rem;
}

.aivi-stat-icon {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid hsl(var(--border));
  background: hsl(var(--background));
}

.aivi-stat-card strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
}

.aivi-stat-card span {
  display: block;
  margin-top: .25rem;
  color: hsl(var(--muted-foreground));
  font-size: .75rem;
}

.aivi-content-area {
  min-height: 0;
  padding: 1.25rem 1.5rem;
}

.aivi-learning-shell {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
}

.aivi-learning-head {
  padding-bottom: 0;
}

.aivi-learning-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.aivi-learning-title {
  display: flex;
  align-items: center;
  gap: .85rem;
  min-width: 0;
}

.aivi-learning-title-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  flex: 0 0 auto;
}

.aivi-learning-title h1 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.2;
}

.aivi-learning-title p {
  margin: .35rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: .92rem;
  font-weight: 650;
  line-height: 1.65;
}

.aivi-learning-content {
  padding-top: .95rem;
  transition: opacity .16s ease, transform .16s ease;
}

.aivi-learning-page.is-tab-loading .aivi-learning-content {
  opacity: .45;
  transform: translateY(2px);
  pointer-events: none;
}

.aivi-learning-page.is-tab-loading .aivi-learning-tabs .aivi-mode-tab {
  pointer-events: none;
}

.aivi-learning-section-intro {
  margin-bottom: 1rem;
  max-width: 48rem;
}

.aivi-learning-section-intro h2 {
  margin: .25rem 0 0;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 850;
  letter-spacing: 0;
  line-height: 1.3;
}

.aivi-learning-section-intro p {
  margin: .35rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: .9rem;
  font-weight: 600;
  line-height: 1.65;
}

.aivi-learning-section-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 1.45rem;
  border: 1px solid hsl(var(--border));
  border-radius: 999px;
  background: hsl(var(--background));
  padding: .15rem .55rem;
  color: hsl(var(--muted-foreground));
  font-size: .72rem;
  font-weight: 800;
}

.aivi-learning-page .aivi-page-grid {
  max-width: none;
}

.aivi-learning-page .aivi-hero-card,
.aivi-learning-page .aivi-soft-card,
.aivi-learning-page .aivi-card {
  border-radius: calc(var(--radius) + 4px);
}

.aivi-learning-page .aivi-soft-card {
  padding: 1rem;
}

.aivi-brain-ko-blur {
  filter: blur(8px);
  opacity: .45;
  pointer-events: none;
  user-select: none;
  transition: filter .25s ease, opacity .25s ease;
}

.aivi-brain-ko-hidden-note {
  margin-top: .5rem;
  color: #64748b;
  font-size: .85rem;
  font-weight: 700;
}

.aivi-home-empty-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px dashed hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .35);
  padding: 1rem;
}

.aivi-home-empty-row strong {
  display: block;
  font-weight: 800;
}

.aivi-home-empty-row p {
  margin: .25rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: .85rem;
  line-height: 1.6;
}

.aivi-dashboard-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr);
  gap: 1rem;
  align-items: start;
}

.aivi-home-dashboard-grid {
  max-width: 1180px;
}

.aivi-learning-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .875rem;
}

.aivi-learning-card {
  display: flex;
  align-items: flex-start;
  gap: .875rem;
  padding: 1rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--card));
  transition: background-color .18s, transform .18s, box-shadow .18s;
}

.aivi-learning-card:hover {
  background: hsl(var(--accent));
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgb(15 23 42 / .06);
}

.aivi-learning-card-static,
.aivi-learning-card-static:hover,
.aivi-learning-card-disabled,
.aivi-learning-card-disabled:hover {
  transform: none;
  box-shadow: none;
}

.aivi-learning-card-static {
  background: hsl(var(--background));
}

.aivi-learning-card-disabled {
  color: hsl(var(--muted-foreground));
  background: hsl(var(--muted) / .45);
  cursor: not-allowed;
}

.aivi-learning-card-disabled em {
  display: inline-flex;
  margin-left: .35rem;
  color: hsl(var(--muted-foreground));
  font-size: .72rem;
  font-style: normal;
  font-weight: 800;
}

.aivi-learning-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: hsl(var(--muted));
  color: hsl(var(--foreground));
  flex: 0 0 auto;
}

.aivi-learning-card strong {
  display: block;
  font-size: .95rem;
  font-weight: 800;
  margin-bottom: .25rem;
}

.aivi-learning-card p {
  margin: 0;
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
  line-height: 1.55;
}

.aivi-chat-preview {
  display: flex;
  flex-direction: column;
  gap: .875rem;
}

.aivi-message {
  display: flex;
  align-items: flex-start;
  gap: .875rem;
}

.aivi-message.user {
  flex-direction: row-reverse;
}

.aivi-msg-icon {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) - 4px);
  background: hsl(var(--background));
}

.aivi-message.user .aivi-msg-icon {
  border-color: transparent;
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.aivi-msg-content {
  min-width: 0;
}

.aivi-msg-meta {
  margin-bottom: .375rem;
  color: hsl(var(--muted-foreground));
  font-size: .75rem;
  font-weight: 700;
}

.aivi-message.user .aivi-msg-meta {
  text-align: right;
}

.aivi-msg-bubble {
  padding: .875rem 1rem;
  border-radius: var(--radius);
  background: hsl(var(--muted));
  color: hsl(var(--foreground));
  font-size: .875rem;
  line-height: 1.65;
}

.aivi-message.user .aivi-msg-bubble {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.aivi-right-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  border-left: 1px solid hsl(var(--border));
  background: hsl(var(--background));
}

body.aivi-right-hidden .aivi-right-panel {
  width: 0;
  min-width: 0;
  overflow: hidden;
  border-left: 0;
}

body.aivi-right-hidden .aivi-right-panel > * {
  opacity: 0;
  pointer-events: none;
}

.aivi-right-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid hsl(var(--border));
}

.aivi-right-header strong {
  font-size: .9rem;
  font-weight: 800;
}

.aivi-right-body {
  overflow-y: auto;
  padding: 1rem;
}

.aivi-right-body .aivi-card + .aivi-card {
  margin-top: .875rem;
}

.aivi-data-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .65rem 0;
  border-bottom: 1px solid hsl(var(--border));
}

.aivi-data-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.aivi-data-label {
  font-weight: 700;
}

.aivi-data-value {
  color: hsl(var(--muted-foreground));
  font-size: .82rem;
  text-align: right;
}

.aivi-action-list {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.aivi-action-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .625rem;
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) - 4px);
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font-size: .84rem;
  font-weight: 700;
  text-align: left;
  transition: background-color .18s;
}

.aivi-action-item:hover {
  background: hsl(var(--accent));
}

.aivi-progress-track {
  height: .5rem;
  border-radius: 999px;
  background: hsl(var(--muted));
  overflow: hidden;
}

.aivi-progress-bar {
  height: 100%;
  width: 68%;
  background: hsl(var(--primary));
  border-radius: inherit;
}

.aivi-muted {
  color: hsl(var(--muted-foreground));
}

.aivi-text-xs {
  font-size: .75rem;
}

.aivi-text-sm {
  font-size: .875rem;
}

@media (max-width: 1280px) {
  .aivi-shadcn-app {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .aivi-right-panel {
    display: none;
  }
}

@media (max-width: 1180px) {
  .aivi-topbar {
    grid-template-columns: minmax(100px, .55fr) auto minmax(180px, 1fr);
    gap: .75rem;
  }

  .aivi-header-report {
    display: none;
  }

  .aivi-auth-pill {
    max-width: 8.5rem;
  }

  .aivi-command-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .aivi-dashboard-grid {
    grid-template-columns: 1fr;
  }

  .aivi-home-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 1100px) {
  .aivi-topnav {
    display: none;
  }
}

@media (max-width: 980px) {
  body.aivi-shadcn-body {
    overflow-y: auto;
  }

  .aivi-shadcn-app {
    display: block;
    height: auto;
  }

  .aivi-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: 60;
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: 24px 0 60px rgb(15 23 42 / .16);
  }

  body.aivi-sidebar-open .aivi-sidebar {
    transform: translateX(0);
  }

  .aivi-mobile-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgb(15 23 42 / .35);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease;
  }

  body.aivi-sidebar-open .aivi-mobile-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .aivi-main {
    min-height: 100vh;
    height: auto;
  }

  .aivi-topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 0 .875rem;
  }

  .aivi-mobile-open {
    display: inline-flex;
  }

  .aivi-breadcrumbs {
    display: flex;
  }

  .aivi-topnav {
    display: none;
  }

  .aivi-top-actions {
    gap: .375rem;
    min-width: max-content;
  }

  .aivi-header-optional {
    display: none;
  }

  .aivi-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .aivi-home-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .aivi-workspace {
    min-height: calc(100vh - var(--header-height));
  }

  .aivi-learning-header {
    flex-direction: column;
  }

  .aivi-learning-title {
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .aivi-topbar {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .aivi-breadcrumbs a,
  .aivi-breadcrumbs span {
    display: none;
  }

  .aivi-auth-pill {
    max-width: 7.25rem;
  }

  .aivi-auth-button {
    min-width: 4.5rem;
    padding-left: .625rem;
    padding-right: .625rem;
  }

  .aivi-workspace-head,
  .aivi-content-area {
    padding-left: .875rem;
    padding-right: .875rem;
  }

  .aivi-title-row {
    flex-direction: column;
  }

  .aivi-command-strip,
  .aivi-stats,
  .aivi-home-stats,
  .aivi-learning-grid {
    grid-template-columns: 1fr;
  }

  .aivi-learning-title-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
  }

  .aivi-learning-tabs {
    justify-content: flex-start;
    overflow-x: auto;
  }

  .aivi-learning-tabs .aivi-mode-tab {
    flex: 0 0 auto;
  }

  .aivi-home-empty-row {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .aivi-topbar {
    padding-left: .625rem;
    padding-right: .625rem;
  }

  .aivi-auth-pill {
    max-width: 6.25rem;
  }

  .aivi-top-actions {
    gap: .25rem;
  }
}

/* =========================================================
   AIVI English - shadcn all learning pages
   Daily / Brain / Writing / Listening / Exam / Review / Report
   ========================================================= */

.aivi-page-grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.aivi-page-grid.two-col {
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
  align-items: start;
}

.aivi-hero-card {
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(circle at top left, hsl(var(--muted)) 0, transparent 260px),
    hsl(var(--card));
  padding: 1.25rem;
  box-shadow: 0 1px 2px rgb(15 23 42 / .04);
}

.aivi-hero-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.aivi-hero-title {
  display: flex;
  align-items: flex-start;
  gap: .875rem;
}

.aivi-hero-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  flex: 0 0 auto;
}

.aivi-hero-title h2 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.03em;
}

.aivi-hero-title p {
  margin: .3rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: .875rem;
  line-height: 1.65;
}

.aivi-hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .5rem;
  flex-wrap: wrap;
}

.aivi-section-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.aivi-soft-card {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--card));
  padding: 1rem;
  box-shadow: 0 1px 2px rgb(15 23 42 / .035);
}

.aivi-soft-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .875rem;
}

.aivi-soft-card-title {
  font-size: .98rem;
  font-weight: 800;
  letter-spacing: -.015em;
}

.aivi-soft-card-desc {
  margin-top: .25rem;
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
  line-height: 1.55;
}

.aivi-korean-sentence {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.65;
  letter-spacing: -.02em;
}

.aivi-english-sentence {
  margin-top: .75rem;
  padding: .875rem 1rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .55);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.7;
}

.aivi-chunk-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.aivi-chunk {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border: 1px solid hsl(var(--border));
  border-radius: 999px;
  background: hsl(var(--background));
  padding: .35rem .65rem;
  font-size: .8rem;
  font-weight: 700;
}

.aivi-form-group {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.aivi-form-group label {
  font-size: .82rem;
  font-weight: 800;
}

.aivi-input,
.aivi-textarea,
.aivi-select {
  width: 100%;
  border: 1px solid hsl(var(--input));
  border-radius: calc(var(--radius) - 3px);
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  padding: .7rem .8rem;
  outline: 0;
  transition: box-shadow .18s, border-color .18s;
}

.aivi-textarea {
  min-height: 7rem;
  resize: vertical;
  line-height: 1.6;
}

.aivi-input:focus,
.aivi-textarea:focus,
.aivi-select:focus {
  border-color: hsl(var(--ring));
  box-shadow: 0 0 0 3px hsl(var(--ring) / .12);
}

.aivi-answer-box {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  padding: 1rem;
}

.aivi-option-list {
  display: flex;
  flex-direction: column;
  gap: .625rem;
}

.aivi-option {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: .875rem;
  transition: background-color .18s, border-color .18s, transform .18s;
}

.aivi-option:hover {
  background: hsl(var(--accent));
  transform: translateY(-1px);
}

.aivi-option input {
  margin-top: .2rem;
}

.aivi-option strong {
  display: block;
  font-size: .9rem;
  font-weight: 800;
}

.aivi-option span {
  display: block;
  margin-top: .2rem;
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
}

.aivi-audio-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .875rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  padding: 1rem;
}

.aivi-audio-main {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-width: 0;
}

.aivi-audio-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  flex: 0 0 auto;
}

.aivi-note-list {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.aivi-note-item {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: .875rem;
}

.aivi-note-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .5rem;
}

.aivi-note-item strong {
  font-size: .9rem;
  font-weight: 800;
}

.aivi-note-item p {
  margin: 0;
  color: hsl(var(--muted-foreground));
  font-size: .82rem;
  line-height: 1.65;
}

.aivi-report-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .875rem;
}

.aivi-report-metric {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: 1rem;
}

.aivi-report-metric span {
  color: hsl(var(--muted-foreground));
  font-size: .78rem;
  font-weight: 700;
}

.aivi-report-metric strong {
  display: block;
  margin-top: .35rem;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -.04em;
}

.aivi-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .875rem;
}

.aivi-timeline-item {
  display: flex;
  gap: .75rem;
}

.aivi-timeline-dot {
  width: .75rem;
  height: .75rem;
  margin-top: .35rem;
  border-radius: 999px;
  background: hsl(var(--primary));
  flex: 0 0 auto;
  box-shadow: 0 0 0 4px hsl(var(--muted));
}

.aivi-timeline-body strong {
  display: block;
  font-size: .86rem;
  font-weight: 800;
}

.aivi-timeline-body span {
  display: block;
  margin-top: .2rem;
  color: hsl(var(--muted-foreground));
  font-size: .78rem;
}

.aivi-empty-state {
  border: 1px dashed hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  padding: 1rem;
  color: hsl(var(--muted-foreground));
  font-size: .85rem;
  line-height: 1.7;
}

@media (max-width: 1180px) {
  .aivi-page-grid.two-col,
  .aivi-report-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .aivi-hero-top,
  .aivi-soft-card-header,
  .aivi-audio-box {
    flex-direction: column;
    align-items: stretch;
  }

  .aivi-hero-actions {
    justify-content: flex-start;
  }
}

/* =========================================================
   AIVI English - shadcn all learning pages
   Daily / Brain / Writing / Listening / Exam / Review / Report
   ========================================================= */

.aivi-page-grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.aivi-page-grid.two-col {
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
  align-items: start;
}

.aivi-hero-card {
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(circle at top left, hsl(var(--muted)) 0, transparent 260px),
    hsl(var(--card));
  padding: 1.25rem;
  box-shadow: 0 1px 2px rgb(15 23 42 / .04);
}

.aivi-hero-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.aivi-hero-title {
  display: flex;
  align-items: flex-start;
  gap: .875rem;
}

.aivi-hero-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  flex: 0 0 auto;
}

.aivi-hero-title h2 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.03em;
}

.aivi-hero-title p {
  margin: .3rem 0 0;
  color: hsl(var(--muted-foreground));
  font-size: .875rem;
  line-height: 1.65;
}

.aivi-hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .5rem;
  flex-wrap: wrap;
}

.aivi-section-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.aivi-soft-card {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--card));
  padding: 1rem;
  box-shadow: 0 1px 2px rgb(15 23 42 / .035);
}

.aivi-soft-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .875rem;
}

.aivi-soft-card-title {
  font-size: .98rem;
  font-weight: 800;
  letter-spacing: -.015em;
}

.aivi-soft-card-desc {
  margin-top: .25rem;
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
  line-height: 1.55;
}

.aivi-korean-sentence {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.65;
  letter-spacing: -.02em;
}

.aivi-english-sentence {
  margin-top: .75rem;
  padding: .875rem 1rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .55);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.7;
}

.aivi-chunk-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.aivi-chunk {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border: 1px solid hsl(var(--border));
  border-radius: 999px;
  background: hsl(var(--background));
  padding: .35rem .65rem;
  font-size: .8rem;
  font-weight: 700;
}

.aivi-form-group {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.aivi-form-group label {
  font-size: .82rem;
  font-weight: 800;
}

.aivi-input,
.aivi-textarea,
.aivi-select {
  width: 100%;
  border: 1px solid hsl(var(--input));
  border-radius: calc(var(--radius) - 3px);
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  padding: .7rem .8rem;
  outline: 0;
  transition: box-shadow .18s, border-color .18s;
}

.aivi-textarea {
  min-height: 7rem;
  resize: vertical;
  line-height: 1.6;
}

.aivi-input:focus,
.aivi-textarea:focus,
.aivi-select:focus {
  border-color: hsl(var(--ring));
  box-shadow: 0 0 0 3px hsl(var(--ring) / .12);
}

.aivi-answer-box {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  padding: 1rem;
}

.aivi-option-list {
  display: flex;
  flex-direction: column;
  gap: .625rem;
}

.aivi-option {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: .875rem;
  transition: background-color .18s, border-color .18s, transform .18s;
}

.aivi-option:hover {
  background: hsl(var(--accent));
  transform: translateY(-1px);
}

.aivi-option input {
  margin-top: .2rem;
}

.aivi-option strong {
  display: block;
  font-size: .9rem;
  font-weight: 800;
}

.aivi-option span {
  display: block;
  margin-top: .2rem;
  color: hsl(var(--muted-foreground));
  font-size: .8rem;
}

.aivi-audio-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .875rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  padding: 1rem;
}

.aivi-audio-main {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-width: 0;
}

.aivi-audio-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  flex: 0 0 auto;
}

.aivi-note-list {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.aivi-note-item {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: .875rem;
}

.aivi-note-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .5rem;
}

.aivi-note-item strong {
  font-size: .9rem;
  font-weight: 800;
}

.aivi-note-item p {
  margin: 0;
  color: hsl(var(--muted-foreground));
  font-size: .82rem;
  line-height: 1.65;
}

.aivi-report-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .875rem;
}

.aivi-report-metric {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: 1rem;
}

.aivi-report-metric span {
  color: hsl(var(--muted-foreground));
  font-size: .78rem;
  font-weight: 700;
}

.aivi-report-metric strong {
  display: block;
  margin-top: .35rem;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -.04em;
}

.aivi-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .875rem;
}

.aivi-timeline-item {
  display: flex;
  gap: .75rem;
}

.aivi-timeline-dot {
  width: .75rem;
  height: .75rem;
  margin-top: .35rem;
  border-radius: 999px;
  background: hsl(var(--primary));
  flex: 0 0 auto;
  box-shadow: 0 0 0 4px hsl(var(--muted));
}

.aivi-timeline-body strong {
  display: block;
  font-size: .86rem;
  font-weight: 800;
}

.aivi-timeline-body span {
  display: block;
  margin-top: .2rem;
  color: hsl(var(--muted-foreground));
  font-size: .78rem;
}

.aivi-empty-state {
  border: 1px dashed hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  padding: 1rem;
  color: hsl(var(--muted-foreground));
  font-size: .85rem;
  line-height: 1.7;
}

@media (max-width: 1180px) {
  .aivi-page-grid.two-col,
  .aivi-report-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .aivi-hero-top,
  .aivi-soft-card-header,
  .aivi-audio-box {
    flex-direction: column;
    align-items: stretch;
  }

  .aivi-hero-actions {
    justify-content: flex-start;
  }
}

/* Writing - chunk hint cards */
.aivi-hint-stack {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.aivi-hint-card {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  padding: .875rem 1rem;
}

.aivi-hint-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .55rem;
}

.aivi-hint-card-title {
  font-size: .88rem;
  font-weight: 800;
}

.aivi-hint-main {
  font-size: .95rem;
  font-weight: 800;
  line-height: 1.6;
}

.aivi-hint-sub {
  margin-top: .35rem;
  color: hsl(var(--muted-foreground));
  font-size: .82rem;
  line-height: 1.65;
}

.aivi-hint-meta {
  margin-top: .65rem;
  display: grid;
  gap: .45rem;
}

.aivi-hint-meta-item {
  border: 1px dashed hsl(var(--border));
  border-radius: calc(var(--radius) - 4px);
  background: hsl(var(--muted) / .35);
  padding: .6rem .7rem;
  font-size: .8rem;
  line-height: 1.65;
}

.aivi-hint-meta-item strong {
  display: inline-block;
  margin-right: .4rem;
  font-weight: 800;
}

/* Writing accordion hint */
.aivi-hint-details {
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--background));
  overflow: hidden;
}

.aivi-hint-details + .aivi-hint-details {
  margin-top: .75rem;
}

.aivi-hint-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .875rem 1rem;
  font-weight: 800;
}

.aivi-hint-summary::-webkit-details-marker {
  display: none;
}

.aivi-hint-summary-main {
  display: flex;
  align-items: center;
  gap: .6rem;
  min-width: 0;
}

.aivi-hint-summary-text {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.aivi-hint-details[open] .aivi-hint-summary {
  border-bottom: 1px solid hsl(var(--border));
  background: hsl(var(--muted) / .35);
}

.aivi-hint-details[open] .aivi-hint-chevron {
  transform: rotate(180deg);
}

.aivi-hint-chevron {
  transition: transform .18s ease;
  color: hsl(var(--muted-foreground));
}

.aivi-hint-body {
  padding: .875rem 1rem 1rem;
}

.aivi-hint-main {
  font-size: .95rem;
  font-weight: 800;
  line-height: 1.6;
}

.aivi-hint-sub {
  margin-top: .45rem;
  color: hsl(var(--muted-foreground));
  font-size: .82rem;
  line-height: 1.65;
}

.aivi-hint-meta {
  margin-top: .75rem;
  display: grid;
  gap: .5rem;
}

.aivi-hint-meta-item {
  border: 1px dashed hsl(var(--border));
  border-radius: calc(var(--radius) - 4px);
  background: hsl(var(--muted) / .35);
  padding: .6rem .7rem;
  font-size: .8rem;
  line-height: 1.65;
}

.aivi-hint-meta-item strong {
  display: inline-block;
  margin-right: .4rem;
  font-weight: 800;
}

/* Brain timer */
.aivi-brain-timer {
  display: grid;
  place-items: center;
  min-height: 150px;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--muted) / .45);
  text-align: center;
}

.aivi-brain-count {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -.06em;
  line-height: 1;
}

.aivi-brain-status {
  margin-top: .5rem;
  color: hsl(var(--muted-foreground));
  font-size: .9rem;
  font-weight: 700;
}