:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #d9deea;
  --surface-subtle: #f8fafc;
  --surface-success: #ecfdf3;
  --surface-danger: #fef3f2;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #16a34a;
  --count-new: #2563eb;
  --count-learning: #dc2626;
  --count-review: #16a34a;
  --shadow: 0 12px 30px rgba(23, 32, 51, 0.08);
}

/* Dark theme variables applied when body has class 'dark' */
body.dark {
  --bg: #0b1220;
  --panel: #0e1622;
  --text: #e6eef6;
  --muted: #97a6b2;
  --line: rgba(255,255,255,0.06);
  --surface-subtle: rgba(255, 255, 255, 0.04);
  --surface-success: rgba(52, 211, 153, 0.12);
  --surface-danger: rgba(255, 107, 107, 0.12);
  --accent-soft: rgba(96, 165, 250, 0.16);
  --primary: #60a5fa;
  --primary-strong: #3b82f6;
  --danger: #ff6b6b;
  --warning: #ffb86b;
  --success: #34d399;
  --count-new: #93c5fd;
  --count-learning: #fca5a5;
  --count-review: #6ee7b7;
  --shadow: none;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

a {
  color: inherit;
}

input,
select,
textarea,
button {
  font: inherit;
}

.auth-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.10), transparent 42%),
    linear-gradient(315deg, rgba(22, 163, 74, 0.10), transparent 38%),
    var(--bg);
}

.auth-shell {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
}

.auth-main {
  width: min(100%, 920px);
}

.auth-topbar,
.auth-footer-wrap {
  width: 100%;
  padding: 0 24px;
}

.auth-topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
  backdrop-filter: blur(18px);
}

body.dark .auth-topbar {
  background: rgba(11, 18, 32, 0.72);
}

.auth-topbar-inner {
  width: min(100%, 1120px);
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.auth-topbar-brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.auth-topbar-brand-logo {
  width: min(190px, 42vw);
  height: auto;
  display: block;
}

.auth-topbar-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--primary-strong);
  font-weight: 650;
}

.auth-footer-wrap {
  margin-top: auto;
}

.auth-panel,
.panel,
.empty-state,
.deck-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.auth-panel {
  width: min(100%, 440px);
  margin: 0 auto;
  padding: 32px;
}

.login-brand {
  display: flex;
  justify-content: center;
  margin-bottom: 22px;
}

.login-brand__logo {
  width: min(280px, 78vw);
  height: auto;
  display: block;
}

.auth-panel.wide {
  width: min(100%, 860px);
}

.maintenance-panel {
  display: grid;
  gap: 16px;
  text-align: center;
}

.maintenance-badge {
  justify-self: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--primary-strong);
  background: var(--accent-soft);
  font-size: 13px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.maintenance-countdown {
  display: grid;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.maintenance-countdown span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.maintenance-countdown strong {
  color: var(--text);
  font-size: 28px;
  line-height: 1.15;
}

.auth-panel h1,
.page-header h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
}

.auth-panel h2,
.panel h2 {
  margin: 0 0 16px;
  font-size: 20px;
}

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

.stack {
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.form-grid .full {
  grid-column: 1 / -1;
}

label {
  display: grid;
  gap: 8px;
  color: var(--text);
  font-weight: 650;
}

label.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

label.checkbox input {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

label.checkbox span {
  font-weight: 500;
  line-height: 1.6;
}

label.checkbox a {
  color: var(--primary-strong);
  text-decoration: none;
}

label.checkbox a:hover {
  text-decoration: underline;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  background: var(--panel);
  color: var(--text);
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.13);
}

.form-help {
  display: block;
  margin-top: 6px;
  font-size: 13px;
}

.notification-targeting {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.notification-targeting h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.notification-channel-grid {
  align-items: center;
}

.btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--panel) 92%, var(--surface-subtle));
  color: var(--text);
  padding: 10px 16px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  font-weight: 700;
  transition: transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--line) 55%, var(--text));
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn.primary:hover {
  background: var(--primary-strong);
}

.btn.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.btn.warning {
  background: var(--warning);
  border-color: var(--warning);
  color: #fff;
}

.btn.success {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.btn.extra-action,
.vanki-ai-actions .btn {
  background: color-mix(in srgb, var(--surface-subtle) 90%, var(--panel));
  border-color: color-mix(in srgb, var(--line) 82%, var(--text));
  color: var(--text);
}

.btn.large {
  min-width: 220px;
  min-height: 52px;
}

.link-button {
  border: 0;
  background: transparent;
  color: #cbd5e1;
  cursor: pointer;
  padding: 8px 0;
  text-align: left;
}

.auth-links,
.actions,
.inline-form {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.form-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.form-actions-start {
  justify-content: flex-start;
}

.form-actions-end {
  justify-content: flex-end;
}

.filter-grid {
  align-items: end;
}

.filter-actions {
  display: flex;
  align-items: end;
}

.filter-actions .btn {
  min-height: 42px;
}

.form-grid > .field-short,
.form-grid > .field-medium {
  justify-self: start;
  width: 100%;
}

.form-grid > .field-short {
  max-width: 220px;
}

.form-grid > .field-medium {
  max-width: 480px;
}

.form-grid > .field-long {
  grid-column: 1 / -1;
}

.admin-settings-form {
  display: grid;
  gap: 20px;
}

.admin-settings-panel {
  margin-bottom: 0;
}

.admin-settings-section-head {
  margin-bottom: 18px;
}

.admin-settings-section-head h2 {
  margin: 0;
}

.admin-settings-section-head p,
.admin-settings-help p {
  margin: 0;
}

.admin-settings-help {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.admin-settings-save {
  justify-content: flex-end;
}

.meta-stack {
  display: grid;
  gap: 2px;
}

.table-actions {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.table-actions .btn {
  min-height: 36px;
  padding: 7px 12px;
  border-radius: 8px;
  font-weight: 650;
}

.table th.actions-col,
.table td.actions-col {
  width: 1%;
  white-space: nowrap;
}

.auth-links {
  margin-top: 18px;
  justify-content: space-between;
  color: var(--primary);
  font-weight: 650;
}

.alert {
  border-radius: 8px;
  padding: 12px 14px;
  margin: 0 0 18px;
  border: 1px solid;
}

.alert.success {
  background: var(--surface-success);
  border-color: rgba(22, 163, 74, 0.22);
  color: var(--success);
}

.alert.error {
  background: var(--surface-danger);
  border-color: rgba(220, 38, 38, 0.22);
  color: var(--danger);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  transition: grid-template-columns 0.28s ease;
}

.app-shell.sidebar-collapsed {
  grid-template-columns: 0 1fr;
}

.sidebar {
  background: #111827;
  color: #fff;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
  position: sticky;
  top: 0;
  align-self: start;
  transition: transform 0.28s ease, opacity 0.28s ease, visibility 0.28s ease;
}

.app-shell.sidebar-collapsed .sidebar {
  transform: translateX(-100%);
  opacity: 0;
  visibility: hidden;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  width: min(165px, 100%);
  height: auto;
  display: block;
}

.sidebar-nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.sidebar-nav-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.sidebar-nav-divider {
  height: 1px;
  margin: 6px 0 2px;
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-nav-label {
  padding: 2px 12px 0;
  color: rgba(209, 213, 219, 0.72);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.sidebar-nav a {
  color: #d1d5db;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  width: 100%;
  box-sizing: border-box;
}

.sidebar-nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.sidebar-nav a.is-active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-weight: 700;
  box-shadow: inset 3px 0 0 rgba(255, 255, 255, 0.62);
}

.sidebar-nav a.is-active:hover {
  background: rgba(255, 255, 255, 0.16);
}

.sidebar-nav a.nav-unread {
  color: #fff;
  font-weight: 700;
}

.unread-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #f43f5e;
  box-shadow: 0 0 0 2px rgba(244, 63, 94, 0.22);
  flex: 0 0 9px;
}

.sidebar-actions {
  margin-top: auto;
  display: grid;
  gap: 16px;
}

.sidebar-icon-button {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.sidebar-icon-button:hover {
  background: rgba(255, 255, 255, 0.14);
}

.sidebar-mobile-only {
  display: none;
}

.app-backdrop {
  display: none;
}

.main-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.app-topbar {
  min-height: 64px;
  padding: 12px 24px 0;
  display: flex;
  align-items: center;
}

.app-topbar-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-topbar-brand {
  display: none;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  text-decoration: none;
  color: var(--text);
}

.app-topbar-brand-logo {
  width: 22px;
  height: 22px;
  display: block;
}

.app-topbar-brand-text {
  line-height: 1;
}

.main-content {
  flex: 1;
  padding: 20px 32px 32px;
  min-width: 0;
}

.site-footer {
  width: 100%;
  margin-top: auto;
  padding: 18px 32px 22px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
}

.site-footer-links,
.site-footer-copy {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.site-footer a {
  color: var(--primary-strong);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}

.panel,
.empty-state {
  padding: 24px;
  margin-bottom: 20px;
}

.danger-panel {
  border-color: rgba(220, 38, 38, 0.35);
  background: linear-gradient(180deg, rgba(254, 242, 242, 0.9), #fff);
}

.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.deck-card {
  padding: 20px;
  display: grid;
  gap: 18px;
}

.deck-card h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

.deck-card p {
  margin: 0;
  color: var(--muted);
}

.deck-tree-panel {
  display: grid;
  gap: 14px;
}

.dashboard-toolbar {
  display: flex;
  justify-content: flex-end;
}

.deck-tree {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.deck-tree.level-0 {
  gap: 12px;
}

.deck-tree:not(.level-0) {
  margin-top: 10px;
  margin-left: 12px;
  padding-left: 10px;
  border-left: 2px solid var(--line);
}

.deck-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 14px;
  display: grid;
  gap: 12px;
}

.deck-row.compact {
  display: block;
  padding: 12px 14px;
}

.deck-row.compact[data-study-url] {
  cursor: pointer;
}

.deck-row.compact[data-study-url]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.deck-row-main h2 {
  margin: 0 0 6px;
  font-size: 18px;
}

.deck-row.compact .deck-row-main h2 {
  margin: 0;
}

.deck-row-main p {
  margin: 0;
  color: var(--muted);
}

.deck-study-link {
  text-decoration: none;
}

.deck-study-link:hover {
  text-decoration: underline;
}

.category-branch {
  display: grid;
  gap: 10px;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.category-toggle {
  flex: 1 1 auto;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-align: left;
  font-weight: 750;
}

.category-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.category-actions form {
  margin: 0;
}

.category-toggle-icon {
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.18s ease;
  flex: 0 0 auto;
  margin-top: -2px;
}

.category-branch.is-collapsed .category-toggle-icon {
  transform: rotate(-45deg);
}

.category-branch-body {
  display: grid;
  gap: 10px;
}

.category-branch.is-collapsed > .category-branch-body {
  display: none;
}

.category-toggle span:last-child {
  margin: 0;
  font-size: 18px;
}

.deck-tree-panel.compact-mode .deck-row-main p,
.deck-tree-panel.compact-mode .deck-row .actions {
  display: none;
}

.deck-tree-panel.compact-mode .deck-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.deck-tree-panel.compact-mode .deck-row-main {
  min-width: 0;
  flex: 1;
}

.deck-tree-panel.compact-mode .counts {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}

.deck-tree-panel.compact-mode .counts span {
  background: transparent;
  border: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  font-size: 0;
}

.deck-tree-panel.compact-mode .counts strong {
  font-size: 14px;
  line-height: 1;
  opacity: 0.92;
}

.library-bulk-actions {
  margin: 0 0 6px;
}

.library-deck-row {
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
}

.library-deck-select,
.library-deck-select-placeholder {
  width: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.library-deck-checkbox {
  width: 18px;
  height: 18px;
  margin: 0;
}

.library-deck-author {
  margin-top: 6px !important;
}

.category-row {
  grid-template-columns: 1fr auto;
}

.category-edit-form {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) minmax(180px, 1.1fr) minmax(180px, 1.1fr) minmax(180px, 1.2fr) auto;
  gap: 10px;
  align-items: center;
}

.counts,
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.counts span,
.stats-row div {
  background: var(--surface-subtle);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  gap: 4px;
}

.counts strong,
.stats-row strong {
  font-size: 24px;
}

.counts span:nth-child(1) strong,
.stats-row div:nth-child(1) strong {
  color: var(--count-new);
}

.counts span:nth-child(2) strong,
.stats-row div:nth-child(2) strong {
  color: var(--count-learning);
}

.counts span:nth-child(3) strong,
.stats-row div:nth-child(3) strong {
  color: var(--count-review);
}

.study-toolbar {
  justify-content: flex-end;
}

.stats-row {
  margin-bottom: 20px;
}

.exam-question-card {
  display: grid;
  gap: 18px;
}

.exam-question-card h2 {
  margin: 0;
}

.exam-question-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.exam-question-content {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
  overflow-x: auto;
}

.exam-options {
  display: grid;
  gap: 10px;
}

.exam-option {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 88%, var(--surface-subtle));
  color: var(--text);
  cursor: pointer;
  font-weight: 500;
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}

.exam-option:hover,
.exam-option:focus-within {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--panel) 82%, var(--accent-soft));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 14%, transparent);
}

.exam-option-input {
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  padding: 0;
  flex: 0 0 auto;
  accent-color: var(--primary);
}

.exam-option-marker,
.exam-review-option-marker {
  width: 30px;
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--panel);
  color: var(--primary-strong);
  font-weight: 800;
  line-height: 1;
}

.exam-option-content,
.exam-review-option-content {
  min-width: 0;
  color: var(--text);
  line-height: 1.6;
}

.exam-option-content > :first-child,
.exam-review-option-content > :first-child,
.exam-question-content > :first-child,
.exam-review-question > :first-child,
.exam-review-justification > div > :first-child {
  margin-top: 0;
}

.exam-option-content > :last-child,
.exam-review-option-content > :last-child,
.exam-question-content > :last-child,
.exam-review-question > :last-child,
.exam-review-justification > div > :last-child {
  margin-bottom: 0;
}

.exam-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 4px;
}

.exam-navigation .btn {
  min-width: 140px;
}

.exam-review-item {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.exam-review-item + .exam-review-item {
  margin-top: 16px;
}

.exam-review-item h3 {
  margin: 0;
}

.exam-review-question,
.exam-review-justification {
  padding: 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  background: var(--panel);
  overflow-x: auto;
}

.exam-review-justification {
  border-left-color: var(--success);
}

.exam-review-justification strong {
  display: block;
  margin-bottom: 8px;
}

.exam-review-meta {
  display: flex;
  gap: 12px 18px;
  flex-wrap: wrap;
  color: var(--muted);
}

.exam-review-meta strong {
  color: var(--text);
}

.exam-status {
  font-weight: 800;
}

.exam-status.correct {
  color: var(--success);
}

.exam-status.wrong {
  color: var(--danger);
}

.exam-status.pending {
  color: var(--warning);
}

.exam-review-options-block {
  display: grid;
  gap: 10px;
}

.exam-review-options {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.exam-review-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.exam-review-option.is-correct {
  border-color: color-mix(in srgb, var(--success) 42%, var(--line));
  box-shadow: inset 3px 0 0 var(--success);
}

.exam-review-option.is-user-wrong {
  border-color: color-mix(in srgb, var(--danger) 42%, var(--line));
  box-shadow: inset 3px 0 0 var(--danger);
}

.exam-review-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.exam-review-badge {
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 800;
}

.exam-review-badge.correct {
  background: var(--surface-success);
  color: var(--success);
}

.exam-review-badge.wrong {
  background: var(--surface-danger);
  color: var(--danger);
}

.exam-review-prompt {
  width: 100%;
  min-height: 320px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  line-height: 1.5;
}

.exam-prompt-actions {
  margin-top: 12px;
}

.table-wrap {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

.table th,
.table td {
  border-bottom: 1px solid var(--line);
  padding: 12px;
  text-align: left;
  vertical-align: top;
}

.table th {
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
}

.feedback-ticket-unread td {
  background: rgba(37, 99, 235, 0.08);
}

body.dark .feedback-ticket-unread td {
  background: rgba(96, 165, 250, 0.12);
}

.bulk-actions,
.panel-inline,
.pagination {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.bulk-actions {
  margin: 14px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.select-col {
  width: 44px;
  text-align: center !important;
  vertical-align: middle !important;
}

.select-col input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
}

.check-list {
  display: grid;
  gap: 10px;
  margin: 20px 0;
}

.check-row {
  display: grid;
  grid-template-columns: 18px minmax(160px, 1fr) 2fr;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--danger);
}

.status-dot.ok {
  background: var(--success);
}

.mapping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.model-config-list {
  display: grid;
  gap: 14px;
}

.model-config-item {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--panel);
}

.model-toggle {
  min-height: 44px;
  padding-top: 8px;
}

.model-prompt textarea {
  min-height: 120px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.45;
}

.button-pick-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.button-picker-toggle {
  margin-top: 12px;
}

.button-picker-shell {
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface-subtle) 82%, var(--panel));
}

.button-picker-toggle > summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--primary-strong);
}

.button-picker-toggle[open] > summary {
  margin-bottom: 6px;
}

.button-pick {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: var(--panel);
}

.button-pick input {
  margin-top: 3px;
}

.button-pick small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-weight: 500;
}

.button-pick.disabled {
  opacity: 0.58;
}

.profile-shell {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.profile-summary {
  display: grid;
  gap: 18px;
}

.profile-avatar {
  width: 72px;
  height: 72px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--primary);
  border: 1px solid var(--line);
  font-size: 30px;
  font-weight: 850;
}

.profile-summary h2 {
  margin: 0 0 4px;
}

.profile-summary p {
  margin: 0;
  overflow-wrap: anywhere;
}

.profile-meta {
  display: grid;
  gap: 12px;
  margin: 0;
}

.profile-meta div {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.profile-meta dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.profile-meta dd {
  margin: 4px 0 0;
  font-weight: 750;
}

.profile-forms {
  min-width: 0;
}

.code-editor {
  min-height: 220px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.45;
  white-space: pre;
  tab-size: 2;
}

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--primary-strong);
  padding: 3px 8px;
  margin-left: 8px;
  font-size: 12px;
  font-weight: 800;
}

.feedback-ticket-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.feedback-ticket-meta div {
  display: grid;
  gap: 4px;
}

.feedback-thread {
  display: grid;
  gap: 14px;
}

.feedback-message {
  max-width: min(760px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: var(--surface-subtle);
}

.feedback-message.mine {
  justify-self: end;
  background: var(--accent-soft);
}

.feedback-message.other {
  justify-self: start;
}

.feedback-message-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.feedback-message p {
  margin: 0;
  line-height: 1.5;
}

.card-suggestion-preview {
  display: grid;
  gap: 16px;
}

.card-suggestion-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card-suggestion-preview-grid article {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.card-suggestion-preview-grid h3 {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.card-suggestion-preview-grid .card {
  min-height: 160px;
  max-height: 360px;
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
}

.card-suggestion-field {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-subtle);
}

.card-suggestion-field h3 {
  margin: 0 0 10px;
}

.card-suggestion-field strong {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.card-suggestion-current {
  min-height: 90px;
  max-height: 260px;
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  overflow-wrap: anywhere;
}

.card-suggestion-panel {
  display: grid;
  gap: 16px;
}

.card-suggestion-panel .table td {
  vertical-align: top;
}

.card-suggestion-changed {
  background: color-mix(in srgb, var(--warning) 10%, transparent);
}

.card-suggestion-changed td:first-child {
  border-left: 4px solid var(--warning);
}

.card-suggestion-reject-form {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.card-suggestion-reject-form textarea {
  max-width: 760px;
}

.study-header {
  margin-bottom: 12px;
}

.study-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  min-height: 360px;
  overflow-x: auto;
  box-shadow: var(--shadow);
}

.check-row {
  background: var(--surface-subtle);
}

.danger-panel {
  border-color: rgba(220, 38, 38, 0.22);
  background: linear-gradient(180deg, var(--surface-danger), var(--panel));
}

.study-actions,
.answer-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 20px 0;
}

.study-bottom-dock {
  margin-top: 4px;
}

.study-undo-form {
  display: inline-flex;
  margin: 0;
}

.pomodoro-panel {
  display: grid;
  gap: 22px;
}

.pomodoro-timer-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
}

.pomodoro-phase-card {
  min-width: 0;
}

.pomodoro-phase-card strong {
  display: block;
  margin-bottom: 4px;
}

.pomodoro-time-display {
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.pomodoro-control-actions {
  justify-content: flex-end;
}

.pomodoro-form {
  gap: 18px;
}

.pomodoro-settings-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.pomodoro-inline-field {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) minmax(96px, 130px);
  gap: 12px;
  align-items: center;
  min-height: 46px;
}

.pomodoro-inline-field input {
  width: 100%;
}

.pomodoro-options {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.pomodoro-form-actions,
.pomodoro-banner-actions {
  justify-content: flex-end;
}

.pomodoro-banner {
  margin-bottom: 0;
}

.pomodoro-review-timer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 76px;
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-subtle);
  color: var(--text);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.pomodoro-review-timer-mobile-wrap {
  display: none;
  justify-content: center;
  margin: 10px 0 12px;
}

body.study-fullscreen .pomodoro-review-timer-toolbar {
  display: none !important;
}

body:not(.study-fullscreen) .pomodoro-review-timer-fullscreen {
  display: none !important;
}

.answer-actions .btn {
  min-width: 172px;
  min-height: 52px;
  padding: 12px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: nowrap;
}

.answer-actions .btn-label {
  display: inline-block;
  min-width: 0;
}

#show-answer-actions .btn {
  min-width: 220px;
}

.btn-interval {
  display: inline-block;
  margin-left: 6px;
  opacity: 0.85;
  font-size: 12px;
  font-weight: 700;
}

.shortcut-hint {
  opacity: 0.82;
  font-weight: 650;
  flex: 0 0 auto;
}

body.study-hide-extras .vanki-ai-actions {
  display: none !important;
}

body.study-fullscreen .sidebar,
body.study-fullscreen .app-topbar,
body.study-fullscreen .site-footer,
body.study-fullscreen .study-header {
  display: none !important;
}

body.study-fullscreen .app-backdrop {
  display: none !important;
}

body.study-fullscreen .app-shell {
  grid-template-columns: 1fr;
}

body.study-fullscreen .main-content {
  padding: 12px;
}

body.study-fullscreen .vanki-face-label {
  display: none;
}

@media (min-width: 861px) {
  body.study-fullscreen .study-card {
    margin-top: 72px;
  }
}

.study-fullscreen-controls {
  position: fixed;
  top: 14px;
  right: 16px;
  z-index: 1300;
  display: flex;
  gap: 10px;
  align-items: center;
}

.hidden-card {
  display: none !important;
}

.onboarding-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 16, 30, 0.45);
  z-index: 1200;
}

.onboarding-modal {
  position: fixed;
  width: min(720px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  overflow: auto;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 1201;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 20px;
  display: grid;
  gap: 12px;
}

.onboarding-contrast {
  --bg: #0b1220;
  --panel: #111827;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --line: rgba(255, 255, 255, 0.10);
  --surface-subtle: rgba(255, 255, 255, 0.06);
  --surface-success: rgba(34, 197, 94, 0.12);
  --surface-danger: rgba(248, 113, 113, 0.12);
  --accent-soft: rgba(96, 165, 250, 0.18);
  --primary: #93c5fd;
  --primary-strong: #bfdbfe;
  --danger: #f87171;
  --warning: #fbbf24;
  --success: #4ade80;
  --shadow: 0 18px 36px rgba(15, 23, 42, 0.30);
  background: var(--panel);
  color: var(--text);
  border-color: var(--line);
}

body.dark .onboarding-contrast {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #d9deea;
  --surface-subtle: #f8fafc;
  --surface-success: #ecfdf3;
  --surface-danger: #fef3f2;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #16a34a;
  --shadow: 0 12px 30px rgba(23, 32, 51, 0.12);
}

.onboarding-modal h2,
.onboarding-modal h3 {
  margin: 0;
}

.onboarding-modal p {
  margin: 0;
  color: var(--muted);
}

.onboarding-modal .actions {
  justify-content: flex-end;
}

.onboarding-bubble {
  position: fixed;
  width: min(360px, calc(100vw - 24px));
  z-index: 1202;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 12px;
  display: grid;
  gap: 10px;
}

.onboarding-bubble p {
  margin: 0;
  color: var(--text);
}

.onboarding-highlight {
  position: relative;
  z-index: 1203;
  outline: 3px solid rgba(59, 130, 246, 0.8);
  outline-offset: 3px;
  border-radius: 8px;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}

.legal-page {
  display: grid;
  gap: 22px;
}

.legal-hero {
  display: grid;
  gap: 16px;
}

.legal-kicker {
  margin: 0 0 10px;
  color: var(--primary-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.legal-summary {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.75;
}

.legal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.legal-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--surface-subtle), var(--panel));
  padding: 18px;
}

.legal-card h2,
.legal-section h2,
.legal-contact-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.legal-card p,
.legal-section p,
.legal-list {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.legal-stack {
  display: grid;
  gap: 16px;
}

.legal-section {
  display: grid;
  gap: 12px;
}

.legal-list {
  padding-left: 20px;
}

.legal-contact-card {
  margin-bottom: 0;
}

.legal-contact-meta {
  margin-top: 8px;
}

.help-subtitle {
  max-width: 90ch;
}

.help-layout {
  display: grid;
  grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.help-summary {
  position: sticky;
  top: 20px;
}

.help-summary h2 {
  margin-bottom: 12px;
}

.help-summary-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}

.help-summary-list a {
  color: var(--primary-strong);
  text-decoration: none;
}

.help-summary-list a:hover {
  text-decoration: underline;
}

.help-content {
  min-width: 0;
}

.help-section {
  scroll-margin-top: 20px;
}

.help-section h3 {
  margin: 16px 0 8px;
  font-size: 18px;
}

.help-section p + p,
.help-section p + ul,
.help-section p + ol,
.help-section ul + p,
.help-section ol + p,
.help-section .help-callout + p,
.help-section .help-callout + ul,
.help-section .help-callout + ol {
  margin-top: 10px;
}

.help-steps {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 6px;
  color: var(--muted);
  line-height: 1.7;
}

.help-callout {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  display: grid;
  gap: 8px;
}

.help-callout strong {
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.help-callout p {
  margin: 0;
}

.help-callout-tip {
  background: color-mix(in srgb, var(--surface-success) 65%, var(--panel));
  border-color: color-mix(in srgb, var(--success) 38%, var(--line));
}

.help-callout-caution {
  background: color-mix(in srgb, var(--surface-danger) 60%, var(--panel));
  border-color: color-mix(in srgb, var(--danger) 28%, var(--line));
}

.help-callout-example {
  background: color-mix(in srgb, var(--surface-subtle) 72%, var(--panel));
  border-color: color-mix(in srgb, var(--primary) 26%, var(--line));
}

@media (max-width: 860px) {
  .help-layout {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .help-summary {
    position: static;
  }

  .help-summary-list {
    gap: 8px;
  }

  .app-shell {
    display: block;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(84vw, 320px);
    z-index: 40;
    transform: translateX(-100%);
    opacity: 1;
    visibility: visible;
    padding-bottom: calc(72px + env(safe-area-inset-bottom));
    gap: 18px;
    transition: transform 0.28s ease, opacity 0.28s ease, visibility 0.28s ease;
  }

  .app-shell.sidebar-mobile-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-actions {
    gap: 12px;
    margin-bottom: 28px;
  }

  .sidebar-mobile-only {
    display: inline-flex;
  }

  .app-backdrop {
    position: fixed;
    inset: 0;
    z-index: 30;
    border: 0;
    background: rgba(15, 23, 42, 0.46);
    display: none;
  }

  .app-shell.sidebar-mobile-open .app-backdrop {
    display: block;
  }

  .app-topbar {
    padding: 16px 20px 0;
  }

  .app-topbar-brand {
    display: inline-flex;
  }

  .auth-topbar-inner {
    min-height: 70px;
  }

  .auth-topbar-brand-logo {
    width: min(160px, 46vw);
  }

  .main-wrapper,
  .main-content {
    min-height: 0;
  }

  .main-content {
    padding: 20px;
  }

  .deck-tree-panel {
    gap: 10px;
  }

  .dashboard-toolbar {
    justify-content: stretch;
  }

  .dashboard-toolbar .btn {
    width: 100%;
  }

  .deck-tree:not(.level-0) {
    margin-left: 8px;
    padding-left: 8px;
  }

  .category-header {
    align-items: stretch;
    flex-direction: column;
  }

  .category-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .category-actions form,
  .category-actions .btn {
    flex: 1 1 150px;
  }

  .deck-row {
    padding: 12px;
    gap: 10px;
  }

  .deck-row-main h2 {
    font-size: 16px;
  }

  .deck-row-main p {
    font-size: 14px;
  }

  .library-deck-row {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .library-deck-row .actions {
    grid-column: 2;
    justify-content: flex-start;
  }

  .counts span,
  .stats-row div {
    padding: 10px;
  }

  .counts strong,
  .stats-row strong {
    font-size: 18px;
  }

  .deck-tree-panel:not(.compact-mode) .counts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    width: 100%;
  }

  .deck-tree-panel:not(.compact-mode) .counts span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 0;
    overflow: hidden;
  }

  .deck-tree-panel:not(.compact-mode) .counts strong {
    line-height: 1;
  }

  .study-toolbar {
    justify-content: flex-start;
  }

  .study-toolbar .btn {
    min-height: 40px;
    padding: 8px 12px;
  }

  .pomodoro-review-timer-toolbar,
  .pomodoro-review-timer-fullscreen {
    display: none !important;
  }

  .pomodoro-review-timer-mobile-wrap:not(.hidden-card) {
    display: flex;
  }

  .admin-settings-save,
  .pomodoro-form-actions,
  .pomodoro-control-actions,
  .pomodoro-banner-actions {
    justify-content: stretch;
  }

  .admin-settings-save .btn,
  .pomodoro-form-actions .btn,
  .pomodoro-control-actions .btn,
  .pomodoro-banner-actions .btn {
    width: 100%;
  }

  .pomodoro-timer-head {
    grid-template-columns: 1fr;
  }

  .pomodoro-control-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .pomodoro-inline-field {
    grid-template-columns: minmax(0, 1fr) minmax(86px, 110px);
  }

  body.study-page .main-content {
    padding-bottom: 248px;
  }

  .study-bottom-dock {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 80;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel) 93%, var(--surface-subtle));
    box-shadow: 0 -10px 22px rgba(15, 23, 42, 0.1);
  }

  .study-actions,
  .answer-actions {
    margin: 0;
  }

  .answer-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .answer-actions .btn {
    width: 100%;
    min-width: 0;
    flex: 0 0 auto;
  }

  .answer-actions button.btn:nth-of-type(1) {
    grid-column: 2;
    grid-row: 1;
  }

  .answer-actions button.btn:nth-of-type(2) {
    grid-column: 1;
    grid-row: 1;
  }

  .answer-actions button.btn:nth-of-type(3) {
    grid-column: 2;
    grid-row: 2;
  }

  .answer-actions button.btn:nth-of-type(4) {
    grid-column: 1;
    grid-row: 2;
  }

  .shortcut-hint {
    display: none;
  }

  #show-answer-actions .btn {
    width: 100%;
    min-width: 0;
  }

  .study-fullscreen-controls {
    position: static;
    transform: none;
    width: 100%;
    min-width: 0;
    margin-top: 10px;
    order: 3;
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .study-fullscreen-controls .study-undo-form,
  .study-fullscreen-controls .btn {
    width: 100%;
  }

  .page-header,
  .form-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .form-grid > .field-short,
  .form-grid > .field-medium {
    max-width: none;
  }

  .filter-actions,
  .form-actions {
    width: 100%;
  }

  .filter-actions .btn,
  .form-actions .btn {
    width: 100%;
  }

  .table-actions {
    display: grid;
    gap: 8px;
  }

  .table-actions .btn,
  .table-actions .inline-form,
  .table-actions .inline-form .btn {
    width: 100%;
  }

  .model-config-item {
    grid-template-columns: 1fr;
  }

  .category-row,
  .category-edit-form {
    grid-template-columns: 1fr;
  }

  .button-picker-shell .panel-inline {
    align-items: stretch;
  }

  .button-picker-shell .panel-inline .btn {
    width: 100%;
  }

  .profile-shell {
    grid-template-columns: 1fr;
  }

  .counts,
  .stats-row {
    grid-template-columns: 1fr;
  }

  .exam-question-head {
    align-items: flex-start;
  }

  .exam-option {
    grid-template-columns: auto auto minmax(0, 1fr);
    padding: 12px;
  }

  .exam-navigation {
    display: grid;
    grid-template-columns: 1fr;
  }

  .exam-navigation .btn {
    width: 100%;
    min-width: 0;
  }

  .exam-review-item {
    padding: 14px;
  }

  .exam-review-meta {
    display: grid;
    gap: 8px;
  }

  .check-row {
    grid-template-columns: 18px 1fr;
  }

  .check-row span:last-child {
    grid-column: 2;
  }

  .auth-shell {
    padding: 24px 16px;
    align-items: flex-start;
  }

  .auth-topbar,
  .auth-footer-wrap {
    padding: 0 16px;
  }

  .auth-topbar-inner {
    min-height: 56px;
  }

  .auth-topbar-links {
    gap: 10px;
    font-size: 14px;
  }

  .site-footer {
    padding: 18px 20px 22px;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .pomodoro-inline-field {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 20px;
}

.analytics-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.analytics-kpi-card {
  display: grid;
  gap: 8px;
  min-height: 118px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.analytics-kpi-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.analytics-kpi-card strong {
  color: var(--text);
  font-size: 28px;
  line-height: 1.1;
}

.analytics-kpi-card small {
  font-size: 12px;
  font-weight: 700;
}

.analytics-chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 20px;
}

.analytics-chart-card {
  min-height: 360px;
  display: grid;
  grid-template-rows: auto minmax(250px, 1fr);
  gap: 12px;
}

.analytics-chart-card canvas {
  width: 100% !important;
  height: 280px !important;
}

.analytics-chart-card canvas[hidden],
.analytics-empty[hidden] {
  display: none !important;
}

.analytics-empty {
  align-self: center;
  justify-self: center;
  margin: 0;
  text-align: center;
}

.analytics-insights ul {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

.analytics-insights li::marker {
  color: var(--primary);
}

.analytics-filter-panel {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--primary) 5%, transparent), transparent 70%),
    var(--panel);
}

.analytics-filter-panel .filter-actions {
  gap: 10px;
  flex-wrap: wrap;
}

.statistics-filter-panel {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--success) 5%, transparent), transparent 70%),
    var(--panel);
}

.statistics-filter-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

.statistics-filter-summary::-webkit-details-marker {
  display: none;
}

.statistics-filter-summary h2 {
  margin: 0;
}

.statistics-filter-summary::after {
  content: "+";
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  background: var(--panel);
  font-weight: 800;
}

.statistics-filter-panel[open] .statistics-filter-summary::after {
  content: "-";
}

.statistics-filter-panel[open] .filter-grid {
  margin-top: 16px;
}

.statistics-filter-checkbox {
  align-self: end;
  min-height: 42px;
}

.statistics-calendar-card {
  grid-template-rows: auto minmax(250px, 1fr);
}

.statistics-calendar {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
  gap: 6px;
  align-content: start;
}

.statistics-calendar-day {
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-subtle);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.statistics-calendar-day.intensity-light {
  background: color-mix(in srgb, var(--success) 18%, var(--panel));
  color: var(--success);
}

.statistics-calendar-day.intensity-moderate {
  background: color-mix(in srgb, var(--warning) 24%, var(--panel));
  color: var(--warning);
}

.statistics-calendar-day.intensity-intense {
  background: color-mix(in srgb, var(--primary) 28%, var(--panel));
  color: var(--primary);
}

@media (max-width: 760px) {
  .analytics-grid,
  .analytics-chart-grid {
    grid-template-columns: 1fr;
  }

  .analytics-kpi-card {
    min-height: auto;
  }

  .card-suggestion-preview-grid,
  .card-suggestion-field {
    grid-template-columns: 1fr;
  }

  .card-suggestion-preview-grid .card,
  .card-suggestion-current {
    max-height: none;
  }

  .card-suggestion-panel .table {
    min-width: 0;
  }
}