/* ============ Shell ============ */
.app-root {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.app-nav {
  flex: 0 0 auto;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--bd);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 27px;
  height: 27px;
  color: var(--on-ac);
  background: var(--ac);
  border-radius: 7px;
}

.nav-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 10px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 11px;
  color: var(--mu);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: background-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.nav-link:hover {
  color: var(--tx);
  background: var(--card);
}

.nav-link.active {
  color: var(--tx);
  background: var(--card);
}

.nav-badge {
  margin-left: 7px;
  padding: 1px 6px;
  color: var(--ac);
  border: 1px solid var(--bd-strong);
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-avatar {
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--bd);
}

.app-shell {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(248px, 288px) 1fr;
  overflow: hidden;
}

.app-shell.navigation-pending {
  visibility: hidden;
}

/* ============ Sidebar ============ */
.sidebar {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  background: var(--panel);
  border-right: 1px solid var(--bd);
  overflow: hidden;
}

/* ---- Explorer ---- */
.explorer {
  /* Task artifacts are a small, bounded set. Keep every file visible; the task list
     below already owns the sidebar's remaining scroll region. */
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: none;
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--bd);
}

.explorer-head,
.browser-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 9px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--faint);
}

.explorer-toggle {
  width: 100%;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  text-align: left;
}

.explorer-title,
.explorer-meta {
  display: inline-flex;
  align-items: center;
}

.explorer-title {
  gap: 7px;
}

.explorer-folder-icon {
  position: relative;
  width: 13px;
  height: 9px;
  border: 1px solid currentColor;
  border-radius: 2px;
  opacity: 0.8;
}

.explorer-folder-icon::before {
  position: absolute;
  top: -4px;
  left: 1px;
  width: 5px;
  height: 3px;
  content: "";
  background: currentColor;
  border-radius: 2px 2px 0 0;
}

.explorer-meta {
  gap: 6px;
}

#explorerCount {
  display: inline-grid;
  place-items: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  color: var(--ac);
  background: transparent;
  border: 1px solid var(--ac-border);
  border-radius: 999px;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}

.explorer-chevron {
  display: none;
}

.side-stats {
  color: var(--mu);
}

.file-explorer {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 0;
  overflow: visible;
  margin: 0 -4px;
  padding: 0 4px;
}

.exp-file {
  display: flex;
  align-items: center;
  gap: 7px;
  width: 100%;
  padding: 4px 7px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--mu);
  font-family: var(--mono);
  font-size: 12px;
  text-align: left;
  transition: background-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.exp-file:hover {
  background: var(--card);
  color: var(--tx);
}

.exp-file.active {
  background: var(--ac-soft);
  color: var(--tx);
}

.exp-file .lang-badge {
  width: 17px;
  height: 15px;
  flex: 0 0 17px;
  border-radius: 3px;
  font-size: 9px;
}

.exp-name {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.exp-lines {
  flex: 0 0 auto;
  color: var(--faint);
  font-size: 10.5px;
}

.exp-folder {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 7px 0 2px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
}

.exp-folder-files {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-left: 6px;
  padding-left: 9px;
  border-left: 1px solid var(--bd);
}

/* ---- Browser (задачи) ---- */
.browser {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
}

.filters {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.field > span {
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--faint);
}

/* ============ Dropdown ============ */
.filter-dropdown {
  position: relative;
  z-index: 1;
}

.filter-dropdown:has(.filter-menu.open) {
  z-index: 30;
}

.filter-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  min-width: 0;
  height: 36px;
  padding: 0 11px;
  color: var(--tx);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 13px;
  transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.filter-trigger:hover {
  border-color: var(--bd-strong);
}

.filter-trigger.open {
  border-color: var(--ac-border);
  background: var(--card-hover);
}

.filter-trigger > span:first-child {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.filter-chevron {
  color: var(--faint);
  font-size: 13px;
  transition: transform var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.filter-trigger.open .filter-chevron {
  color: var(--ac);
  transform: rotate(180deg);
}

.filter-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: 100%;
  display: grid;
  gap: 1px;
  max-height: 264px;
  overflow: auto;
  padding: 5px;
  background: var(--card);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.45);
  pointer-events: none;
  opacity: 0;
  transform: translateY(-6px);
  transform-origin: top;
  transition: opacity var(--duration-fast) var(--ease-standard), transform var(--duration-fast) var(--ease-standard);
}

.filter-menu.open {
  pointer-events: auto;
  opacity: 1;
  transform: translateY(0);
}

.filter-option {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16px;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 8px;
  color: var(--tx);
  text-align: left;
  background: transparent;
  border: 0;
  border-radius: 5px;
  font-size: 13px;
}

.filter-option > span:first-child {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.filter-option:hover {
  background: rgba(255, 255, 255, 0.05);
}

.filter-option.selected {
  background: var(--ac-soft);
}

.filter-check {
  color: var(--ac);
  font-weight: 600;
}

/* Language badges */
.lang-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  color: var(--code-text);
  background: var(--code-line);
  border: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
}

.lang-all {
  color: var(--mu);
  background: var(--code-line);
  box-shadow: inset 0 0 0 1px var(--bd-strong);
}

/* ============ Difficulty chips ============ */
.difficulty-filter {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 5px;
}

.difficulty-filter-chip {
  min-height: 30px;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  transition: border-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.difficulty-filter-chip:hover {
  border-color: var(--bd-strong);
  color: var(--tx);
}

.difficulty-filter-chip.active {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.difficulty-filter-chip.active.difficulty-all {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac-border);
}

.difficulty-filter-chip.active.difficulty-easy {
  color: var(--easy);
  background: var(--easy-soft);
  border-color: var(--easy-border);
}

.difficulty-filter-chip.active.difficulty-medium {
  color: var(--medium);
  background: var(--medium-soft);
  border-color: var(--medium-border);
}

.difficulty-filter-chip.active.difficulty-hard {
  color: var(--hard);
  background: var(--hard-soft);
  border-color: var(--hard-border);
}

/* ============ Filter summary + stats ============ */
.filter-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--mu);
}

.filter-summary button {
  color: var(--ac);
  background: transparent;
  border: 0;
  font-size: 12.5px;
  font-weight: 500;
}

.filter-summary button:hover {
  color: var(--ac-strong);
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stats div {
  padding: 10px 12px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.stats span {
  display: block;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
}

.stats small {
  color: var(--mu);
  font-size: 11.5px;
}

/* ============ Task list ============ */
.task-list {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
  overflow: auto;
  margin: 0 -4px;
  padding: 2px 4px;
}

.task-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  padding: 9px 11px;
  text-align: left;
  color: var(--tx);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.task-card:hover {
  border-color: var(--bd-strong);
  background: var(--card-hover);
}

.task-card.active {
  border-color: var(--ac);
  background: var(--ac-soft);
}

.task-card.solved {
  border-color: rgba(63, 185, 80, 0.3);
}

.task-card.active.solved {
  border-color: var(--ac);
}

.task-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 9px;
}

.task-card-top strong {
  min-width: 0;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.task-card-bottom {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
  font-size: 11.5px;
  color: var(--mu);
}

.task-card-bottom > span:last-child {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============ Difficulty badges / chips ============ */
.difficulty-badge {
  flex: 0 0 auto;
  padding: 2px 8px;
  border-radius: 5px;
  border: 1px solid transparent;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  min-width: 30px;
  text-align: center;
}

.difficulty-badge.difficulty-easy {
  color: var(--easy);
  background: var(--easy-soft);
  border-color: var(--easy-border);
}

.difficulty-badge.difficulty-medium {
  color: var(--medium);
  background: var(--medium-soft);
  border-color: var(--medium-border);
}

.difficulty-badge.difficulty-hard {
  color: var(--hard);
  background: var(--hard-soft);
  border-color: var(--hard-border);
}

.difficulty-badge.solved-badge {
  color: var(--success);
  background: var(--success-soft);
  border-color: var(--easy-border);
}

.difficulty-chip {
  padding: 2px 8px;
  border-radius: 5px;
  border: 1px solid transparent;
  font-size: 11px;
  font-weight: 600;
}

.difficulty-chip.difficulty-easy {
  color: var(--easy);
  background: var(--easy-soft);
  border-color: var(--easy-border);
}

.difficulty-chip.difficulty-medium {
  color: var(--medium);
  background: var(--medium-soft);
  border-color: var(--medium-border);
}

.difficulty-chip.difficulty-hard {
  color: var(--hard);
  background: var(--hard-soft);
  border-color: var(--hard-border);
}

.empty-state {
  display: grid;
  gap: 6px;
  padding: 18px 12px;
  text-align: center;
  color: var(--mu);
  background: var(--card);
  border: 1px dashed var(--bd-strong);
  border-radius: var(--radius);
}

.empty-state strong {
  color: var(--tx);
  font-size: 13px;
  font-weight: 600;
}

.empty-state span {
  font-size: 12px;
}

.cve-promo {
  display: grid;
  gap: 5px;
  width: 100%;
  padding: 11px 12px;
  color: var(--tx);
  text-align: left;
  background: var(--code-line);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.cve-promo:hover {
  background: var(--card);
  border-color: var(--ac-border);
}

.cve-promo-kicker {
  color: var(--ac);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
}

.cve-promo strong {
  font-size: 13px;
  font-weight: 600;
}

.cve-promo span:last-child {
  color: var(--mu);
  font-size: 12px;
  line-height: 1.45;
}

/* ============ Workspace ============ */
.workspace {
  height: 100%;
  min-width: 0;
  overflow: auto;
  padding: 20px;
}

.tasks-view {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 100%;
}

.brief {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.brief-main {
  min-width: 0;
}

.brief-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 9px;
  flex: 0 0 auto;
}

.brief-stats {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--faint);
  white-space: nowrap;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 7px;
  font-size: 12px;
  color: var(--mu);
}

.brief h2 {
  font-size: 21px;
  font-weight: 600;
  line-height: 1.22;
}

.brief-desc {
  margin: 8px 0 0;
  max-width: 760px;
  color: var(--mu);
  font-size: 13px;
  line-height: 1.55;
}

.filter-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  gap: 6px;
  height: 26px;
  padding: 0 11px;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.filter-toggle:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.filter-toggle.active {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac-border);
}

.filter-panel {
  display: grid;
  gap: 12px;
}

/* On wide screens the panel is a popover anchored to the Filter button and floated over
   the workspace, so the task list stays fully visible and updates live while filtering.
   Position is set inline by setupFilterToggle(). */
@media (min-width: 701px) {
  .filter-panel:not(.hidden) {
    position: fixed;
    z-index: 60;
    width: 320px;
    max-height: calc(100dvh - 24px);
    align-content: start;
    padding: 0 14px 14px;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: var(--panel);
    border: 1px solid var(--bd-strong);
    border-radius: 12px;
    box-shadow: var(--shadow-3);
  }

  .filter-panel:not(.hidden) .filter-drawer-head {
    position: sticky;
    z-index: 2;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
    background: var(--panel);
    border-bottom: 1px solid var(--bd);
  }

  .filter-panel:not(.hidden) .filter-close {
    width: 28px;
    height: 28px;
    color: var(--mu);
    background: var(--card);
    border: 1px solid var(--bd);
    border-radius: 7px;
    font-size: 18px;
    line-height: 1;
  }

  .filter-panel:not(.hidden) .filter-apply {
    position: sticky;
    bottom: 0;
    display: block;
    width: 100%;
    min-height: 36px;
    margin-top: 2px;
  }
}

.filter-drawer-head,
.filter-apply,
.filter-backdrop,
.active-filter-chips {
  display: none;
}

/* Applied filters stay visible after the panel closes — otherwise a filtered list
   is indistinguishable from an empty one. */
.active-filter-chips:not(.hidden) {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: -2px 0 2px;
}

.active-filter-chip {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  min-height: 26px;
  padding: 0 9px;
  color: var(--ac);
  background: var(--ac-soft);
  border: 1px solid var(--ac-border);
  border-radius: 999px;
  font-size: 11px;
}

.filter-active-count {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  min-width: 17px;
  height: 17px;
  margin-left: 0;
  padding: 0 4px;
  border-radius: 999px;
  color: var(--ac);
  background: var(--ac-soft);
  font-size: 10px;
}

.browser-head .side-stats {
  margin-left: 6px;
  color: var(--mu);
}

/* ---- Reward loop ---- */
.reward-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 14px;
  background: var(--success-soft);
  border: 1px solid var(--easy-border);
  border-radius: var(--radius);
}

.reward-pts {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--success);
}

.next-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 15px;
  color: var(--on-ac);
  background: var(--ac);
  border: 1px solid var(--ac);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  transition: background-color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}

.next-button:hover {
  background: var(--ac-strong);
  border-color: var(--ac-strong);
}

/* ---- Status bar ---- */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 12px;
  background: var(--panel);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
}

.status-state.state-success {
  color: var(--success);
}
.status-state.state-error {
  color: var(--danger);
}
.status-state.state-warning {
  color: var(--medium);
}

.nav-points {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
  display: inline-block;
}

.nav-points.bump {
  animation: pointsBump 600ms ease;
}

@keyframes pointsBump {
  0% { transform: scale(1); color: var(--mu); }
  30% { transform: scale(1.16); color: var(--success); }
  100% { transform: scale(1); color: var(--mu); }
}

@media (prefers-reduced-motion: reduce) {
  .nav-points.bump {
    animation: none;
  }
}

.actions {
  display: flex;
  gap: 8px;
  flex: 0 0 auto;
}

.icon-button,
.review-button,
.primary-button,
.secondary-button {
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 500;
  transition: background-color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.icon-button {
  width: 38px;
  color: var(--mu);
  background: var(--card);
  border-color: var(--bd);
}

.icon-button:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.review-button {
  padding: 0 13px;
  color: var(--tx);
  background: var(--card);
  border-color: var(--bd-strong);
}

.review-button:hover {
  background: var(--card-hover);
}

.primary-button {
  padding: 0 16px;
  color: var(--on-ac);
  background: var(--ac);
  border-color: var(--ac);
  font-weight: 600;
}

.primary-button:hover {
  background: var(--ac-strong);
  border-color: var(--ac-strong);
}

.secondary-button {
  padding: 0 13px;
  color: var(--tx);
  background: transparent;
  border-color: var(--bd-strong);
}

.secondary-button:hover {
  background: var(--card);
}

/* ============ Onboarding ============ */
.onboarding-callout {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  background: var(--ac-soft);
  border: 1px solid var(--ac-border);
  border-radius: var(--radius);
}

.onboarding-callout strong {
  display: block;
  margin-bottom: 3px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ac-strong);
}

.onboarding-callout p {
  margin: 0;
  font-size: 12.5px;
  color: var(--mu);
  line-height: 1.5;
}

.onboarding-callout button {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  color: var(--mu);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 18px;
  line-height: 1;
}

.onboarding-callout button:hover {
  color: var(--tx);
  background: rgba(255, 255, 255, 0.06);
}

/* ============ Story strip ============ */
.story-strip {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 14px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.story-strip span {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--faint);
}

.story-strip p {
  margin: 0;
  font-size: 13px;
  color: var(--mu);
  line-height: 1.55;
}

/* ============ Review grid ============ */
.review-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(304px, 0.6fr);
  gap: 14px;
  align-items: start;
}

.code-panel {
  overflow: hidden;
  min-width: 0;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 46px;
  padding: 0 14px;
  background: var(--code-line);
  border-bottom: 1px solid var(--bd);
}

.panel-head div {
  min-width: 0;
}

.panel-head strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--code-text);
}

.panel-head span {
  color: var(--code-muted);
  font-size: 12px;
}

.file-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 8px 10px;
  background: var(--code-line);
  border-bottom: 1px solid var(--bd);
}

.file-tab {
  flex: 0 0 auto;
  min-height: 30px;
  padding: 0 11px;
  color: var(--code-muted);
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  transition: color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}

.file-tab:hover {
  color: var(--code-text);
}

.file-tab.active {
  color: var(--tx);
  background: var(--code-bg);
  border-color: var(--ac-border);
}

.code-block {
  margin: 0;
  padding: 8px 0;
  list-style: none;
  max-height: calc(100vh - 360px);
  overflow: auto;
  font-family: var(--mono);
}

.code-block li {
  display: grid;
  grid-template-columns: 50px minmax(540px, 1fr);
  width: max-content;
  min-width: 100%;
  box-sizing: border-box;
  min-height: 26px;
  color: var(--code-text);
  border-left: 3px solid transparent;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}

.code-block li:hover {
  background: rgba(255, 255, 255, 0.035);
}

.code-block li.selected {
  background: var(--ac-soft);
  border-left-color: var(--ac);
}

.code-block li.error {
  background: var(--danger-soft);
  border-left-color: var(--danger);
}

.code-block li.success {
  background: var(--success-soft);
  border-left-color: var(--success);
}

/* ===== Data-flow overlay: evidence chain on the code itself ===== */
.evidence-hint {
  color: var(--mu);
  font-size: 11.5px;
}

.code-block.evidence-mode li {
  grid-template-columns: 18px 50px minmax(522px, 1fr);
}

.evidence-gutter {
  display: flex;
  align-items: center;
  justify-content: center;
}

.evidence-badge {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  color: var(--bg);
  background: var(--mu);
  font-family: var(--sans);
  font-size: 9.5px;
  font-weight: 700;
  line-height: 15px;
  text-align: center;
}

.evidence-badge.kind-source {
  background: var(--ac);
}

.evidence-badge.kind-boundary {
  background: var(--medium);
  color: #2a1c02;
}

.evidence-badge.kind-sink {
  background: var(--hard);
}

.evidence-badge.kind-impact {
  background: var(--impact);
  color: #1c0c2e;
}

.code-block li.evidence-line {
  position: relative;
}

.code-block.evidence-mode:has(li.evidence-line:hover) li:not(.evidence-line) {
  opacity: 0.4;
}

.code-block.evidence-mode:has(li.evidence-line:hover) li.evidence-line {
  opacity: 0.62;
}

.code-block.evidence-mode:has(li.evidence-line:hover) li.evidence-line:hover {
  opacity: 1;
}

.code-block li.evidence-line.kind-source:hover {
  box-shadow: inset 3px 0 0 var(--ac);
}

.code-block li.evidence-line.kind-boundary:hover {
  box-shadow: inset 3px 0 0 var(--medium);
}

.code-block li.evidence-line.kind-sink:hover {
  box-shadow: inset 3px 0 0 var(--hard);
}

.code-block li.evidence-line.kind-impact:hover {
  box-shadow: inset 3px 0 0 var(--impact);
}

.code-block li.evidence-line:hover::after {
  content: attr(data-evidence-note);
  position: absolute;
  left: 58px;
  top: calc(100% + 2px);
  z-index: 60;
  width: max-content;
  max-width: 460px;
  padding: 8px 10px;
  background: var(--card);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius-sm);
  color: var(--tx);
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.48;
  white-space: normal;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

.evidence-badge {
  border: 0;
}

.line-number {
  padding: 0 12px 0 0;
  color: var(--faint);
  background: transparent;
  border: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  text-align: right;
  user-select: none;
  cursor: pointer;
}

.code-block code {
  display: block;
  padding: 2px 14px 2px 0;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.62;
  white-space: pre;
}

.readonly-code {
  max-height: 360px;
  margin: 8px 0 0;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.readonly-code li {
  cursor: default;
}

.readonly-code li:hover {
  background: var(--surface-code-line);
}

.tok-comment {
  color: var(--tok-comment);
  font-style: italic;
}
.tok-string {
  color: var(--tok-string);
}
.tok-keyword {
  color: var(--tok-keyword);
}
.tok-number {
  color: var(--tok-number);
}
.tok-function {
  color: var(--tok-function);
}

/* ============ Inspector ============ */
.inspector {
  display: grid;
  gap: 12px;
}

.result-box {
  display: grid;
  gap: 7px;
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-left: 3px solid var(--bd-strong);
  border-radius: var(--radius);
}

.result-box.success {
  border-left-color: var(--success);
  background: var(--success-soft);
}

.result-box.error {
  border-left-color: var(--danger);
  background: var(--danger-soft);
}

.result-box.warning {
  border-left-color: var(--medium);
  background: var(--medium-soft);
}

.result-kicker {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--faint);
}

.result-box strong {
  font-size: 15px;
  font-weight: 600;
}

.result-box.success strong {
  color: var(--success);
}
.result-box.error strong {
  color: var(--danger);
}
.result-box.warning strong {
  color: var(--medium);
}

.result-box p {
  margin: 0;
  font-size: 12.5px;
  color: var(--mu);
  line-height: 1.5;
}

.attempt-counter {
  font-size: 11.5px;
  color: var(--faint);
}

.info-panel {
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.info-panel h3 {
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--faint);
}

.hint-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hint-head h3 {
  margin-bottom: 0;
}

.hint-toggle {
  height: 26px;
  padding: 0 11px;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 11px;
  transition: color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.hint-toggle:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.hint-toggle.active {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac-border);
}

.hint-body {
  margin-top: 11px;
}

.info-panel p {
  margin: 0;
  font-size: 13px;
  color: var(--mu);
  line-height: 1.55;
}

.deep-hint {
  margin-top: 10px !important;
  padding-top: 10px;
  border-top: 1px solid var(--bd);
  color: var(--tx) !important;
}

.false-leads {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--bd);
}

.false-leads strong {
  display: block;
  margin-bottom: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--medium);
}

.false-leads ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 5px;
}

.false-leads li {
  font-size: 12.5px;
  color: var(--mu);
  line-height: 1.45;
}

.learning-panel {
  display: grid;
  gap: 12px;
}

.learning-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.learning-grid div {
  display: grid;
  gap: 2px;
  padding: 9px 10px;
  background: var(--code-line);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.learning-grid span {
  color: var(--tx);
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
}

.learning-grid small,
.focus-topic small {
  color: var(--mu);
  font-size: 11.5px;
}

.focus-topic {
  display: grid;
  gap: 4px;
  padding-top: 11px;
  border-top: 1px solid var(--bd);
}

.focus-topic span {
  color: var(--ac);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
}

.focus-topic strong {
  color: var(--tx);
  font-size: 13px;
  font-weight: 600;
}

/* ============ CVE view ============ */
.cve-view {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100%;
}

.cve-hero {
  display: grid;
  gap: 10px;
  max-width: 680px;
  padding: 22px 22px 6px;
}

.cve-tag {
  justify-self: start;
  padding: 3px 10px;
  color: var(--ac);
  background: var(--ac-soft);
  border: 1px solid var(--ac-border);
  border-radius: 6px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.cve-hero h2 {
  font-size: 28px;
  font-weight: 600;
}

.cve-hero p {
  margin: 0;
  font-size: 14px;
  color: var(--mu);
  line-height: 1.6;
}

.cve-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 12px;
  padding: 0 22px 28px;
}

.cve-card {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 16px 17px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.cve-card:hover {
  border-color: var(--bd-strong);
}

.cve-card-top {
  display: flex;
  align-items: center;
  gap: 9px;
}

.cve-rank {
  flex: 0 0 auto;
  padding: 2px 7px;
  color: var(--mu);
  background: var(--code-line);
  border: 1px solid var(--bd);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}

.cve-emoji {
  font-size: 16px;
  line-height: 1;
}

.cve-name {
  flex: 1 1 auto;
  font-size: 15.5px;
  font-weight: 600;
}

.pill-sev {
  flex: 0 0 auto;
  padding: 2px 9px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
}

.sev-critical {
  color: var(--hard);
  background: var(--hard-soft);
  border-color: var(--hard-border);
}

.sev-high {
  color: var(--medium);
  background: var(--medium-soft);
  border-color: var(--medium-border);
}

.sev-medium {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac-border);
}

.sev-logic {
  color: var(--mu);
  background: var(--code-line);
  border-color: var(--bd-strong);
}

.cve-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 12px;
  color: var(--mu);
}

.cve-id {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--code-text);
}

.cve-dot {
  color: var(--faint);
}

.cve-desc {
  margin: 0;
  font-size: 13px;
  color: #b8bfc7;
  line-height: 1.6;
}

.cve-why {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 2px;
  padding-top: 11px;
  border-top: 1px solid var(--bd);
  font-size: 12.5px;
  color: var(--tx);
}

.cve-why-label {
  flex: 0 0 auto;
  color: var(--ac);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.cve-more {
  justify-self: start;
  margin-top: 2px;
  padding: 6px 11px;
  color: var(--tx);
  background: var(--code-line);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  transition: border-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.cve-more:hover {
  color: var(--ac);
  border-color: var(--ac-border);
}

.cve-detail {
  display: grid;
  gap: 13px;
  margin-top: 4px;
  padding-top: 13px;
  border-top: 1px solid var(--bd);
}

.cve-block {
  display: grid;
  gap: 6px;
}

.cve-block-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--faint);
}

.cve-block p {
  margin: 0;
  font-size: 13px;
  color: #b8bfc7;
  line-height: 1.58;
}

.cve-poc {
  margin: 0;
  padding: 11px 12px;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.cve-poc code {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--tok-string);
  white-space: pre;
}

/* ============ Leaderboard view ============ */
.leaderboard-view {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100%;
  padding: 22px;
}

.leaderboard-hero {
  display: grid;
  gap: 10px;
  max-width: 980px;
}

.leaderboard-tag,
.leaderboard-you-kicker {
  color: var(--ac);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.leaderboard-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
}

.leaderboard-heading h2 {
  font-size: 28px;
  font-weight: 600;
}

.leaderboard-heading p {
  max-width: 620px;
  margin: 7px 0 0;
  color: var(--mu);
  font-size: 14px;
  line-height: 1.6;
}

.leaderboard-meta {
  flex: 0 0 auto;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
}

.leaderboard-controls {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.leaderboard-period-switch {
  display: inline-flex;
  gap: 3px;
  padding: 4px;
  background: color-mix(in srgb, var(--code-line) 78%, transparent);
  border: 1px solid var(--bd);
  border-radius: calc(var(--radius-sm) + 2px);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--tx) 4%, transparent);
}

.leaderboard-period-switch button {
  min-height: 34px;
  padding: 6px 13px;
  color: var(--faint);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  transition: color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.leaderboard-period-switch button:not(.active):hover {
  color: var(--mu);
  background: color-mix(in srgb, var(--card) 48%, transparent);
}

.leaderboard-period-switch button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.leaderboard-period-switch button.active {
  color: var(--accent-hover);
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--accent-hover) 10%, transparent);
}

.leaderboard-podium {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 980px;
  align-items: end;
}

.podium-card {
  display: grid;
  justify-items: center;
  gap: 7px;
  min-height: 210px;
  padding: 18px 16px 0;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.podium-1 {
  min-height: 244px;
  border-color: var(--ac-border);
  background: var(--card);
}

.podium-rank {
  color: var(--ac);
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
}

.podium-card strong {
  font-size: 13.5px;
  font-weight: 600;
}

.podium-card span:not(.podium-rank):not(.reviewer-avatar) {
  color: var(--mu);
  font-family: var(--mono);
  font-size: 12px;
}

.reviewer-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  color: var(--tx);
  background: var(--code-line);
  border: 1px solid var(--bd-strong);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}

.podium-avatar {
  flex-basis: 32px;
  width: 32px;
  height: 32px;
  border-color: var(--ac-border);
}

.podium-bar {
  width: calc(100% + 32px);
  height: 56px;
  margin-top: auto;
  background: var(--bd-strong);
}

.podium-1 .podium-bar {
  height: 78px;
  background: var(--ac);
}

.podium-2 .podium-bar {
  height: 60px;
  background: #56606c;
}

.podium-3 .podium-bar {
  height: 44px;
  background: #434c57;
}

.leaderboard-table,
.leaderboard-you {
  max-width: 980px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  overflow: hidden;
}

.leaderboard-table-head,
.leaderboard-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 100px 120px;
  align-items: center;
  gap: 12px;
}

.leaderboard-table-head {
  padding: 10px 14px;
  color: var(--faint);
  background: var(--code-line);
  border-bottom: 1px solid var(--bd);
  font-family: var(--mono);
  font-size: 11px;
}

.leaderboard-row {
  min-height: 50px;
  padding: 0 14px;
  border-bottom: 1px solid var(--bd);
}

.leaderboard-row:last-child {
  border-bottom: 0;
}

.leaderboard-empty {
  padding: 22px;
  color: var(--mu);
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
}

.leaderboard-row:hover {
  background: rgba(255, 255, 255, 0.035);
}

.leaderboard-rank,
.leaderboard-solved {
  color: var(--mu);
  font-family: var(--mono);
  font-size: 12px;
}

.leaderboard-reviewer {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--tx);
  font-size: 13px;
}

.leaderboard-reviewer span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-points {
  color: var(--tx);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
}

.leaderboard-you {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1fr);
  align-items: stretch;
  margin-bottom: 22px;
  border-color: var(--ac-border);
  box-shadow: inset 3px 0 0 var(--ac);
}

.leaderboard-you-copy {
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 14px;
  border-right: 1px solid var(--bd);
}

.leaderboard-you-copy strong {
  font-size: 14px;
  font-weight: 600;
}

.leaderboard-you-copy span:last-child {
  color: var(--mu);
  font-size: 12.5px;
}

.leaderboard-row.you-row {
  min-height: 76px;
  border-bottom: 0;
  background: var(--ac-soft);
}

/* ============ Modal ============ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(5, 7, 9, 0.66);
}

.solution-modal {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  width: min(940px, 100%);
  max-height: min(820px, calc(100vh - 48px));
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--bd-strong);
  border-radius: 10px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--bd);
}

.modal-head-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.modal-solved {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  color: var(--success);
  background: var(--success-soft);
  border: 1px solid var(--easy-border);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.modal-meta {
  display: block;
  margin-bottom: 6px;
  color: var(--ac);
  font-size: 12px;
  font-weight: 600;
}

.modal-head h2 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.18;
}

.modal-close {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 22px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.modal-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 6px;
  overflow-x: auto;
  padding: 10px;
  background: var(--code-line);
  border-bottom: 1px solid var(--bd);
}

.modal-tab {
  min-height: 38px;
  color: var(--mu);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
}

.modal-tab:hover {
  color: var(--tx);
}

.modal-tab.active {
  color: var(--tx);
  background: var(--panel);
  border-color: var(--bd-strong);
}

.modal-panel {
  overflow: auto;
  padding: 18px 20px 20px;
}

.modal-section + .modal-section {
  margin-top: 18px;
}

.modal-kicker {
  display: block;
  margin-bottom: 9px;
  color: var(--faint);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.modal-copy {
  max-width: 720px;
  margin: 0;
  color: var(--tx);
  font-size: 14px;
  line-height: 1.68;
}

.trace-list {
  display: grid;
  gap: 10px;
}

.trace-item {
  overflow: hidden;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.trace-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  background: var(--code-line);
  border-bottom: 1px solid var(--bd);
}

.trace-item-head strong {
  color: var(--code-text);
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
}

.trace-item pre,
.modal-code {
  margin: 0;
  padding: 12px 14px;
  overflow: auto;
  color: var(--code-text);
  background: var(--code-bg);
}

.trace-item code,
.modal-code code {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre;
}

.trace-item p {
  margin: 0;
  padding: 12px 13px;
  color: #b8bfc7;
  font-size: 13px;
  line-height: 1.58;
}

.trace-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
  padding: 12px;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.flow-node {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  background: var(--card);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius-sm);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-standard), transform var(--duration-fast) var(--ease-standard);
}

.flow-node:hover {
  transform: translateY(-1px);
  border-color: var(--ac-border);
}

.flow-node-step {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--bg);
  background: var(--mu);
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
}

.flow-node.kind-source .flow-node-step {
  background: var(--ac);
}

.flow-node.kind-boundary .flow-node-step {
  background: var(--medium);
  color: #2a1c02;
}

.flow-node.kind-sink .flow-node-step {
  background: var(--hard);
}

.flow-node.kind-impact .flow-node-step {
  background: var(--impact);
  color: #1c0c2e;
}

.flow-node.kind-source {
  border-color: var(--ac-border);
}

.flow-node.kind-sink {
  border-color: var(--hard-border);
}

.flow-node.kind-impact {
  border-color: var(--impact-border);
}

.flow-node-body {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.flow-node-label {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--tx);
}

.flow-node-loc {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--mu);
}

.flow-arrow {
  flex: 0 0 auto;
  padding: 0 3px;
  color: var(--faint);
  font-size: 14px;
}

.trace-item.flash {
  animation: traceFlash 900ms ease;
}

@keyframes traceFlash {
  0% {
    background: var(--ac-soft);
    box-shadow: 0 0 0 2px var(--ac-border);
  }
  100% {
    background: var(--code-bg);
    box-shadow: none;
  }
}

.evidence-code .trace-item {
  border-color: var(--bd);
  border-left: 3px solid var(--danger);
}

.evidence-code .trace-item-head {
  background: var(--code-line);
}

.modal-code {
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

/* ===== Вкладка «Эксплуатация»: пейлоад выделен как основной артефакт ===== */
.modal-code.exploit-payload {
  border-color: var(--warning-border);
  background: var(--warning-soft);
  color: var(--tx);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  user-select: all;
}

.exploit-note {
  margin: 4px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--bd);
  color: var(--mu);
  font-size: 12px;
  line-height: 1.55;
}

/* ============ Wide pages ============ */
.app-shell.wide-mode {
  grid-template-columns: 1fr;
}

.app-shell.wide-mode .sidebar {
  display: none;
}

/* ============ Nav brand button ============ */
.nav-home {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 3px 8px 3px 3px;
  background: transparent;
  border: 0;
  border-radius: 8px;
  color: inherit;
  transition: background-color var(--duration-fast) var(--ease-standard);
}

.nav-home:hover {
  background: var(--card);
}

/* ============ Home ============ */
.home-view {
  max-width: 940px;
  margin: 0 auto;
  padding: 8px 4px 32px;
  display: flex;
  flex-direction: column;
  gap: 34px;
}

.home-hero {
  padding-top: 20px;
}

.home-kicker {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ac);
}

.home-hero h1 {
  font-size: 34px;
  line-height: 1.16;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.home-hero p {
  margin: 16px 0 0;
  max-width: 680px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--mu);
}

.home-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.home-cta .primary-button {
  height: 42px;
  padding: 0 20px;
  font-size: 14px;
}

.home-stat {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--faint);
}

.home-label {
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--faint);
}

.home-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.home-card {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 15px 16px;
  text-align: left;
  color: var(--tx);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard), transform var(--duration-fast) var(--ease-standard);
}

.home-card:hover {
  border-color: var(--bd-strong);
  background: var(--card-hover);
  transform: translateY(-1px);
}

.home-card.accent {
  border-color: var(--ac-border);
}

.home-card.warn {
  border-color: var(--medium-border);
}

.home-card-kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--ac);
}

.home-card.warn .home-card-kicker {
  color: var(--medium);
}

.home-card-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--tx);
}

.home-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  color: var(--mu);
}

.home-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.home-step {
  padding: 15px 16px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.home-step-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-bottom: 10px;
  border-radius: 6px;
  background: var(--ac-soft);
  color: var(--ac);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}

.home-step strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

.home-step p {
  margin: 5px 0 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mu);
}

/* ============ Learn ============ */
.learn-view {
  max-width: 1040px;
  margin: 0 auto;
  padding: 8px 4px 32px;
}

.learn-hero {
  max-width: 720px;
  padding: 18px 18px 6px;
}

.learn-kicker {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ac);
}

.learn-hero h2 {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.18;
}

.learn-hero p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mu);
}

.learn-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
  padding: 18px 18px 4px;
}

.learn-card {
  display: grid;
  gap: 9px;
  padding: 16px 17px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.learn-card:hover {
  border-color: var(--bd-strong);
}

.learn-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.learn-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--tx);
}

.learn-progress {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ac);
}

.learn-tagline {
  margin: 0;
  font-size: 13px;
  color: #b8bfc7;
  line-height: 1.55;
}

.learn-more {
  justify-self: start;
  margin-top: 2px;
  padding: 6px 11px;
  color: var(--tx);
  background: var(--code-line);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  transition: border-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.learn-more:hover {
  color: var(--ac);
  border-color: var(--ac-border);
}

.learn-detail {
  display: grid;
  gap: 13px;
  margin-top: 4px;
  padding-top: 13px;
  border-top: 1px solid var(--bd);
}

.learn-block {
  display: grid;
  gap: 6px;
}

.learn-block-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--faint);
}

.learn-mono {
  margin: 0;
  padding: 9px 11px;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--tok-string);
}

.learn-block ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 5px;
}

.learn-block li {
  font-size: 12.5px;
  line-height: 1.5;
  color: #b8bfc7;
}

.learn-practice {
  justify-self: start;
  margin-top: 2px;
  padding: 7px 14px;
  color: var(--on-ac);
  background: var(--ac);
  border: 1px solid var(--ac);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
}

.learn-practice:hover {
  background: var(--ac-strong);
  border-color: var(--ac-strong);
}

/* ============ Hardening ============ */
.harden-view {
  max-width: 1000px;
  margin: 0 auto;
  padding: 8px 4px 32px;
}

.harden-hero {
  max-width: 720px;
  padding: 18px 18px 6px;
}

.harden-kicker {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ac);
}

.harden-hero h2 {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.18;
}

.harden-hero p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mu);
}

.harden-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  padding: 18px;
}

.harden-card {
  display: grid;
  gap: 7px;
  padding: 15px 16px;
  text-align: left;
  color: var(--tx);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.harden-card:hover {
  border-color: var(--ac-border);
  background: var(--card-hover);
}

.harden-card-kind {
  justify-self: start;
  padding: 2px 8px;
  color: var(--ac);
  background: var(--ac-soft);
  border: 1px solid var(--ac-border);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
}

.harden-card strong {
  font-size: 14.5px;
  font-weight: 600;
}

.harden-card-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--mu);
}

.harden-drill {
  margin: 6px 18px 0;
  padding: 16px;
  scroll-margin-top: 18px;
  background: var(--card);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius);
}

.harden-drill-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.harden-drill-head h3 {
  margin: 8px 0 0;
  font-size: 18px;
  font-weight: 600;
}

.harden-close {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  color: var(--mu);
  background: var(--code-line);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 20px;
  line-height: 1;
}

.harden-close:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.harden-brief {
  margin: 12px 0 12px;
  font-size: 13.5px;
  color: var(--mu);
  line-height: 1.55;
}

.harden-tabname {
  display: inline-block;
  padding: 6px 11px;
  color: var(--code-text);
  background: var(--code-line);
  border: 1px solid var(--bd);
  border-bottom: 0;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-family: var(--mono);
  font-size: 12px;
}

.harden-code {
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: 0 var(--radius-sm) var(--radius-sm) var(--radius-sm);
  max-height: none;
}

.harden-code li {
  cursor: pointer;
}

.harden-code li.marked {
  background: var(--ac-soft);
  border-left-color: var(--ac);
}

.harden-code li.hit {
  background: var(--success-soft);
  border-left-color: var(--success);
}

.harden-code li.miss {
  background: var(--danger-soft);
  border-left-color: var(--danger);
}

.harden-code li.reveal {
  background: var(--medium-soft);
  border-left-color: var(--medium);
  border-left-style: dashed;
}

.harden-controls {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.harden-result {
  margin-top: 14px;
  padding: 10px 13px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--medium);
  background: var(--medium-soft);
  border: 1px solid var(--medium-border);
  border-radius: var(--radius-sm);
}

.harden-result.all {
  color: var(--success);
  background: var(--success-soft);
  border-color: var(--easy-border);
}

.harden-key {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.harden-finding {
  padding: 12px 14px;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-left: 3px solid var(--danger);
  border-radius: var(--radius-sm);
}

.harden-finding-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 7px;
}

.harden-finding-head strong {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--code-text);
}

.harden-sev {
  padding: 2px 8px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
}

.harden-sev.sev-crit {
  color: var(--hard);
  background: var(--hard-soft);
  border-color: var(--hard-border);
}

.harden-sev.sev-high {
  color: var(--medium);
  background: var(--medium-soft);
  border-color: var(--medium-border);
}

.harden-sev.sev-med {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac-border);
}

.harden-why {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: #b8bfc7;
}

.harden-fix {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--tx);
}

.harden-fix span {
  color: var(--success);
  font-weight: 600;
}

.harden-extra {
  margin: 4px 0 0;
  padding: 10px 13px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mu);
  background: var(--code-line);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.cve-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 0 22px;
}

.cve-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.cve-chip {
  height: 32px;
  padding: 0 13px;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 500;
  transition: color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.cve-chip:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.cve-chip.active {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac-border);
}

.cve-notify {
  height: 34px;
  padding: 0 15px;
  color: var(--on-ac);
  background: var(--ac);
  border: 1px solid var(--ac);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
}

.cve-notify:hover {
  background: var(--ac-strong);
  border-color: var(--ac-strong);
}

/* ============ Win animation ============ */
.win-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  pointer-events: none;
}

.win-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  color: var(--on-ac);
  background: var(--success);
  box-shadow: 0 0 0 10px rgba(63, 185, 80, 0.16);
  animation: winPop 560ms cubic-bezier(0.2, 0.9, 0.3, 1.35) both;
}

.win-badge svg {
  width: 46px;
  height: 46px;
  animation: winFadeUp 420ms ease 130ms both;
}

.win-label {
  font-size: 20px;
  font-weight: 600;
  color: var(--success);
  animation: winFadeUp 520ms ease 60ms both;
}

.win-overlay.fade {
  animation: winOut 280ms ease forwards;
}

@keyframes winPop {
  0% { transform: scale(0.4); opacity: 0; }
  60% { opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes winFadeUp {
  0% { opacity: 0; transform: translateY(7px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes winOut {
  to { opacity: 0; }
}

.win-confetti {
  position: fixed;
  top: 0;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  z-index: 201;
  pointer-events: none;
  animation: confettiFall var(--cf-dur, 900ms) ease-out forwards;
}

@keyframes confettiFall {
  0% { opacity: 1; transform: translate(0, 0) rotate(0); }
  100% { opacity: 0; transform: translate(var(--cf-x, 0), var(--cf-y, 260px)) rotate(var(--cf-r, 360deg)); }
}

.code-block li.just-solved {
  animation: linePulse 950ms ease;
}

@keyframes linePulse {
  0% { background: rgba(63, 185, 80, 0.42); }
  100% { background: var(--success-soft); }
}

@media (prefers-reduced-motion: reduce) {
  .win-badge,
  .win-badge svg,
  .win-label,
  .code-block li.just-solved {
    animation: none;
  }
}

/* ============ Modal readability ============ */
.modal-summary {
  margin-bottom: 16px;
}

.modal-lead {
  margin: 0;
  color: var(--tx);
  font-size: 15px;
  line-height: 1.72;
}

.modal-impact {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 20px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-left: 3px solid var(--medium);
  border-radius: var(--radius);
}

.modal-impact-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--medium);
}

.modal-impact-text {
  color: var(--tx);
  font-size: 13.5px;
  line-height: 1.55;
}

.trace-item-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.trace-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  background: var(--ac-soft);
  color: var(--ac);
  font-size: 11px;
  font-weight: 600;
}

.trace-item-label {
  color: var(--ac);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.evidence-code .trace-item-label {
  color: var(--hard);
}

/* ============ Auth ============ */
.auth-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  display: flex;
  overflow: hidden;
  border: 1px solid var(--bd);
  border-radius: 6px;
}

.lang-btn {
  height: 26px;
  padding: 0 9px;
  color: var(--faint);
  background: transparent;
  border: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  transition: color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard);
}

.lang-btn:hover {
  color: var(--tx);
}

.lang-btn.active {
  color: var(--tx);
  background: var(--card);
}

.nav-login {
  height: 32px;
  padding: 0 14px;
  color: var(--on-ac);
  background: var(--ac);
  border: 1px solid var(--ac);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
}

.nav-login:hover {
  background: var(--ac-strong);
  border-color: var(--ac-strong);
}

.user-email {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  color: var(--tx);
}

.nav-logout {
  height: 32px;
  padding: 0 11px;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 500;
}

.nav-logout:hover {
  color: var(--tx);
  border-color: var(--bd-strong);
}

.auth-modal {
  width: min(420px, 100%);
  max-height: calc(100vh - 24px);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--panel);
  border: 1px solid var(--bd-strong);
  border-radius: 10px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  scrollbar-width: thin;
}

.auth-modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--bd);
}

.auth-modal-head h2 {
  font-size: 20px;
  font-weight: 600;
}

.auth-form {
  display: grid;
  gap: 13px;
  padding: 18px 20px 6px;
}

.auth-field {
  display: grid;
  gap: 6px;
}

.auth-field span {
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--faint);
}

.auth-field input {
  height: 38px;
  padding: 0 12px;
  color: var(--tx);
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.auth-field input:focus {
  border-color: var(--ac-border);
}

.auth-field input::placeholder {
  color: var(--faint);
}

.password-input {
  position: relative;
  display: block;
}

.password-input input {
  width: 100%;
  padding-right: 44px;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 3px;
  display: grid;
  width: 36px;
  height: 32px;
  place-items: center;
  color: var(--faint);
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transform: translateY(-50%);
}

.password-toggle:hover,
.password-toggle:focus-visible {
  color: var(--tx);
  background: var(--card-hover);
  outline: none;
}

.password-toggle svg {
  width: 18px;
  height: 18px;
}

.auth-error {
  margin: 0;
  padding: 9px 11px;
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid var(--hard-border);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
}

/* ===== OAuth-вход ===== */
.oauth-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 4px;
}

.oauth-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 44px;
  padding: 0 16px;
  color: var(--tx);
  background: var(--card);
  border: 1px solid var(--bd-strong);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}

.oauth-button:hover {
  background: var(--card-hover, var(--surface-2));
  border-color: var(--ac-border);
}

.oauth-button:focus-visible {
  outline: 2px solid var(--ac);
  outline-offset: 2px;
}

.oauth-icon {
  flex: 0 0 auto;
}

.oauth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
  color: var(--faint);
  font-size: 12px;
}

.oauth-divider::before,
.oauth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--bd);
}

.auth-consent-group {
  display: grid;
  gap: 6px;
  padding: 10px;
  background: color-mix(in srgb, var(--card) 72%, transparent);
  border: 1px solid var(--bd);
  border-radius: calc(var(--radius-sm) + 2px);
}

.auth-consent-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 2px 3px;
  color: var(--faint);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.auth-consent-required {
  padding: 3px 7px;
  color: var(--mu);
  background: var(--panel);
  border: 1px solid var(--bd);
  border-radius: 999px;
  font-size: 9.5px;
  letter-spacing: 0.04em;
}

.auth-consent {
  position: relative;
  display: flex;
  min-height: 54px;
  gap: 11px;
  align-items: center;
  padding: 9px 10px;
  color: var(--mu);
  background: var(--panel);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    color var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}

.auth-consent input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.auth-consent-box {
  display: grid;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  place-items: center;
  color: var(--surface-0);
  background: var(--card);
  border: 1px solid var(--bd-strong);
  border-radius: 6px;
  transition:
    background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.auth-consent-box svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.25;
  opacity: 0;
  transform: scale(0.7);
  transition:
    opacity var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.auth-consent-copy {
  display: grid;
  min-width: 0;
  gap: 2px;
  line-height: 1.35;
}

.auth-consent-title {
  color: var(--tx);
  font-size: 12.5px;
}

.auth-consent-note {
  color: var(--faint);
  font-size: 10.5px;
}

.auth-consent:hover {
  background: var(--card-hover);
  border-color: var(--bd);
}

.auth-consent:has(input:checked) {
  background: color-mix(in srgb, var(--ac) 7%, var(--panel));
  border-color: var(--ac-border);
}

.auth-consent input:checked + .auth-consent-box {
  color: var(--surface-0);
  background: var(--ac);
  border-color: var(--ac);
}

.auth-consent input:checked + .auth-consent-box svg {
  opacity: 1;
  transform: scale(1);
}

.auth-consent input:focus-visible + .auth-consent-box {
  outline: 2px solid var(--ac);
  outline-offset: 2px;
}

.auth-consent a {
  color: var(--ac);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--ac) 55%, transparent);
}

.auth-consent a:hover,
.auth-consent a:focus-visible {
  color: var(--ac-hover);
  border-bottom-color: currentColor;
  outline: none;
}

.auth-submit {
  width: 100%;
  height: 40px;
  margin-top: 2px;
}

/* ===== Подвал с юридическими ссылками ===== */
.app-footer {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 16px;
  padding: 16px 18px;
  border-top: 1px solid var(--bd);
  color: var(--faint);
  font-size: 12px;
}

.app-footer a {
  color: var(--mu);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

.app-footer a:hover {
  color: var(--tx);
}

.app-footer .footer-sep {
  color: var(--bd-strong, var(--bd));
}

.auth-switch {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 20px 20px;
  font-size: 12.5px;
  color: var(--mu);
}

.auth-switch button {
  color: var(--ac);
  background: transparent;
  border: 0;
  font-size: 12.5px;
  font-weight: 600;
}

.auth-switch button:hover {
  color: var(--ac-strong);
}

/* ============ Utility ============ */
.hidden {
  display: none !important;
}

body.modal-open {
  overflow: hidden;
}

/* ============ Interview mode ============ */
.interview-root {
  padding: 0 0 24px;
}

.iv-hero {
  max-width: 760px;
  padding: 18px 18px 6px;
}

.iv-kicker {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ac);
}

.iv-hero h2 {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.18;
}

.iv-hero p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mu);
}

.iv-setup {
  display: grid;
  gap: 18px;
  max-width: 640px;
  margin: 22px 18px 0;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.iv-opt-group {
  display: grid;
  gap: 8px;
}

.iv-opt-label {
  font-size: 12px;
  color: var(--mu);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.iv-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.iv-pill {
  padding: 7px 14px;
  color: var(--tx);
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.iv-pill:hover {
  border-color: var(--ac);
}

.iv-pill.active {
  color: var(--ac);
  background: var(--ac-soft);
  border-color: var(--ac);
  font-weight: 600;
}

.iv-start-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 4px;
}

.iv-pool-count,
.iv-sc-row small {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
}

.iv-pool-note {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mu);
}

/* восстановление просроченной сессии */
.iv-expired {
  padding: 28px 22px;
  max-width: 68ch;
}

.iv-expired h2 {
  margin: 10px 0 12px;
  font-size: 22px;
  line-height: 1.3;
}

.iv-expired p {
  margin: 0 0 10px;
  line-height: 1.6;
  color: var(--tx);
}

.iv-expired-hint {
  color: var(--mu);
  font-size: 14px;
}

.iv-expired-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}

/* runner */
.iv-run-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px 0;
}

.iv-run-progress {
  display: flex;
  align-items: center;
  gap: 12px;
}

.iv-run-num {
  font-weight: 600;
  font-size: 15px;
}

.iv-tag {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
}

.iv-run-timer {
  display: flex;
  align-items: center;
  gap: 12px;
}

.iv-timer {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--tx);
  font-variant-numeric: tabular-nums;
}

.iv-timer.warn {
  color: var(--danger);
}

.iv-quit {
  padding: 5px 11px;
  color: var(--mu);
  background: transparent;
  border: 1px solid var(--bd);
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}

.iv-quit:hover {
  color: var(--tx);
  border-color: var(--ac);
}

.iv-brief {
  margin: 12px 18px 0;
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--mu);
  background: var(--card);
  border: 1px solid var(--bd);
  border-left: 3px solid var(--ac);
  border-radius: var(--radius-sm);
}

.iv-body {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 16px;
  padding: 16px 18px 0;
}

.iv-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.iv-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  color: var(--mu);
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: 6px 6px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
}

.iv-tab.active {
  color: var(--tx);
  background: var(--panel);
  border-bottom-color: transparent;
}

.iv-tab-dot {
  min-width: 16px;
  padding: 0 5px;
  color: var(--bg);
  background: var(--ac);
  border-radius: 9px;
  font-size: 10px;
  text-align: center;
}

.iv-tabname {
  padding: 7px 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-bottom: 0;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.iv-code-head .lang-badge {
  flex: 0 0 auto;
}

.iv-code {
  margin: 0;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.iv-controls {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

/* checklist */
.iv-checklist {
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.iv-checklist-title {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ac);
}

.iv-checklist ol {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mu);
}

/* debrief */
.iv-result {
  padding: 10px 13px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--medium);
  background: var(--medium-soft);
  border: 1px solid var(--medium-border);
  border-radius: var(--radius-sm);
}

.iv-result.all {
  color: var(--success);
  background: var(--success-soft);
  border-color: var(--success);
}

.iv-findings {
  display: grid;
  gap: 10px;
}

.iv-finding {
  padding: 12px 13px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.iv-finding-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 7px;
  flex-wrap: wrap;
}

.iv-finding-head strong {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
}

.iv-finding-category {
  padding: 2px 8px;
  color: var(--ac);
  background: var(--ac-soft);
  border: 1px solid var(--ac-border);
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
}

.iv-why {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--tx);
}

.iv-fix {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mu);
}

.iv-fix span {
  color: var(--success);
  font-weight: 600;
}

.iv-section {
  margin-top: 14px;
}

.iv-section-title {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mu);
}

.iv-chain {
  display: grid;
  gap: 7px;
}

.iv-chain-step {
  padding: 9px 11px;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.iv-chain-label {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--ac);
}

.iv-chain-loc {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mu);
}

.iv-chain-step p {
  margin: 5px 0 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--tx);
}

.iv-trap {
  padding: 9px 11px;
  margin-bottom: 7px;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-left: 3px solid var(--danger);
  border-radius: var(--radius-sm);
}

.iv-trap strong {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
}

.iv-trap p {
  margin: 5px 0 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--tx);
}

.iv-fixpatch {
  margin: 0;
  padding: 12px;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--tx);
  white-space: pre;
}

.iv-extra {
  margin-top: 12px;
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mu);
  background: var(--ac-soft);
  border-radius: var(--radius-sm);
}

/* scorecard */
.iv-sc-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 12px;
  margin: 18px 18px 0;
}

.iv-sc-stat {
  display: grid;
  gap: 4px;
  padding: 16px;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius);
}

.iv-sc-stat span {
  font-size: 24px;
  font-weight: 600;
  color: var(--tx);
}

.iv-sc-stat small {
  font-size: 11px;
  color: var(--mu);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.iv-sc-list {
  display: grid;
  gap: 6px;
  margin: 18px 18px 0;
}

.iv-verdict {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 0.3fr);
  gap: 16px;
  margin: 18px;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.iv-verdict-copy {
  display: grid;
  gap: 6px;
}

.iv-verdict-copy > span,
.iv-verdict-next small {
  color: var(--ac);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.iv-verdict-copy p {
  margin: 0;
  color: var(--tx);
  font-size: 12px;
  line-height: 1.55;
}

.iv-verdict-next {
  display: grid;
  align-content: center;
  gap: 6px;
  padding-left: 16px;
  border-left: 1px solid var(--bd);
}

.iv-verdict-next strong {
  color: var(--tx);
  font-size: 15px;
}

.iv-verdict-next .iv-sc-learn {
  justify-self: start;
  min-height: 32px;
  padding: 0 12px;
  color: var(--bg);
  background: var(--ac);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.iv-sc-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: var(--radius-sm);
}

.iv-sc-row.status-clean {
  border-color: var(--success);
}

.iv-sc-row.status-partial {
  border-color: var(--medium);
}

.iv-sc-row.status-miss {
  border-color: var(--danger);
}

.iv-sc-row.status-timeout {
  border-color: var(--mu);
}

.iv-sc-i {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mu);
}

.iv-sc-title {
  display: grid;
  gap: 2px;
  font-size: 13.5px;
  color: var(--tx);
  min-width: 0;
}

.iv-sc-title-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
}

.iv-status {
  padding: 2px 6px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
}

.iv-status.status-clean { color: var(--success); }
.iv-status.status-partial { color: var(--medium); }
.iv-status.status-miss { color: var(--danger); }
.iv-status.status-timeout { color: var(--mu); }

.iv-sc-title small {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mu);
}

.iv-sc-meta {
  display: flex;
  align-items: center;
  gap: 6px;
}

.iv-sc-meta .lang-badge {
  flex: 0 0 auto;
}

.iv-sc-weak {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin-top: 5px;
  color: var(--medium);
  font-size: 11px;
}

.iv-sc-weak strong {
  color: inherit;
}

.iv-sc-compare {
  display: grid;
  gap: 3px;
  margin-top: 4px;
  color: var(--mu);
  font-size: 10.5px;
}

.iv-sc-compare code {
  color: var(--tx);
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.iv-sc-learn {
  padding: 0;
  color: var(--ac);
  background: transparent;
  border: 0;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.iv-sc-learn:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.iv-sc-score {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--tx);
}

.iv-sc-time {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--mu);
  font-variant-numeric: tabular-nums;
}

.iv-sc-list + .iv-start-row {
  margin: 18px 18px 0;
}

@media (max-width: 900px) {
  .iv-body {
    grid-template-columns: 1fr;
  }

  .iv-verdict {
    grid-template-columns: 1fr;
  }

  .iv-verdict-next {
    padding: 12px 0 0;
    border-top: 1px solid var(--bd);
    border-left: 0;
  }
}

/* ============ Responsive ============ */
@media (max-width: 1120px) {
  .app-root {
    height: auto;
    min-height: 100vh;
    overflow: visible;
  }

  .app-shell {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .sidebar {
    height: auto;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--bd);
  }

  /* Single-column shell: the page itself scrolls, so no nested scroll regions here. */
  .task-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-height: none;
    overflow: visible;
  }

  .explorer {
    max-height: none;
  }

  .file-explorer {
    overflow: visible;
  }

  /* The file tree is collapsible from here down, where it sits above the workspace. */
  .explorer-toggle {
    cursor: pointer;
  }

  .explorer-toggle:hover,
  .explorer-toggle:focus-visible {
    color: var(--tx);
  }

  .explorer-chevron {
    display: inline-block;
    transition: transform var(--duration-fast) var(--ease-standard);
  }

  .explorer-toggle.collapsed .explorer-chevron {
    transform: rotate(180deg);
  }

  .workspace {
    height: auto;
    overflow: visible;
  }

  .review-grid {
    grid-template-columns: 1fr;
  }

  .code-block {
    max-height: none;
  }

  .leaderboard-view {
    padding: 18px;
  }

  .leaderboard-podium {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .podium-card,
  .podium-1 {
    min-height: 180px;
  }

  .leaderboard-you {
    grid-template-columns: 1fr;
  }

  .leaderboard-you-copy {
    border-right: 0;
    border-bottom: 1px solid var(--bd);
  }
}

@media (max-width: 700px) {
  body.filter-drawer-open {
    overflow: hidden;
  }

  .active-filter-chips:not(.hidden) {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    margin: -2px 0 2px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .active-filter-chips::-webkit-scrollbar {
    display: none;
  }

  .active-filter-chip {
    min-height: 28px;
  }

  .filter-backdrop:not(.hidden) {
    position: fixed;
    z-index: 80;
    inset: 0;
    display: block;
    background: rgba(2, 6, 14, 0.68);
    backdrop-filter: blur(2px);
  }

  .filter-panel:not(.hidden) {
    position: fixed;
    z-index: 81;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    max-height: min(82dvh, 680px);
    padding: 0 18px max(18px, env(safe-area-inset-bottom));
    overflow-y: auto;
    overscroll-behavior: contain;
    background: var(--panel);
    border: 1px solid var(--bd-strong);
    border-bottom: 0;
    border-radius: 18px 18px 0 0;
    box-shadow: 0 -18px 50px rgba(0, 0, 0, 0.38);
  }

  .filter-drawer-head {
    position: sticky;
    z-index: 2;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 58px;
    background: var(--panel);
    border-bottom: 1px solid var(--bd);
  }

  .filter-close {
    width: 34px;
    height: 34px;
    color: var(--mu);
    background: var(--card);
    border: 1px solid var(--bd);
    border-radius: 9px;
    font-size: 22px;
    line-height: 1;
  }

  .filter-apply {
    position: sticky;
    bottom: 0;
    display: block;
    width: 100%;
    min-height: 44px;
    margin-top: 2px;
  }

  .app-nav {
    padding: 0 14px;
    gap: 8px;
  }

  .nav-title {
    display: none;
  }

  .nav-brand {
    min-width: 0;
    flex: 1 1 auto;
    gap: 8px;
    overflow: hidden;
  }

  .nav-links {
    min-width: 0;
    gap: 2px;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    scroll-snap-type: x proximity;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    flex: 0 0 auto;
    height: 40px;
    padding: 0 12px;
    font-size: 12px;
    scroll-snap-align: start;
  }

  .nav-right {
    gap: 6px;
  }

  .nav-badge,
  .nav-points {
    display: none;
  }

  .nav-right {
    flex: 0 0 auto;
  }

  .sidebar,
  .workspace {
    padding: 14px;
  }

  /* Larger touch targets for the core line-tap interaction */
  .code-block li,
  .harden-code li,
  .iv-code li {
    min-height: 36px;
    align-items: center;
  }

  /* iOS Safari zooms in on focus when input font-size < 16px */
  input,
  textarea,
  select {
    font-size: 16px;
  }

  .filters,
  .task-list {
    grid-template-columns: 1fr;
    max-height: 300px;
  }

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

  .topbar {
    flex-direction: column;
  }

  .actions {
    width: 100%;
  }

  .primary-button {
    flex: 1;
  }

  .code-block li {
    grid-template-columns: 44px minmax(420px, 1fr);
  }

  .code-block.evidence-mode li {
    grid-template-columns: 16px 44px minmax(404px, 1fr);
  }

  .code-block li.evidence-line:hover::after {
    left: 16px;
    max-width: calc(100vw - 64px);
  }

  .story-strip {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .modal-backdrop {
    padding: 12px;
    align-items: stretch;
  }

  .solution-modal {
    max-height: calc(100vh - 24px);
  }

  .trace-item-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .leaderboard-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .leaderboard-controls { justify-items: start; }

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

  .leaderboard-table .leaderboard-table-head,
  .leaderboard-table .leaderboard-row {
    grid-template-columns: 56px minmax(170px, 1fr) 70px 92px;
    min-width: 420px;
  }

  .leaderboard-you .leaderboard-row {
    grid-template-columns: 56px minmax(0, 1fr) 70px 82px;
    min-width: 0;
  }
}