/* ─────────────────────────────────────────────────────────────
   App stylesheet — page-specific & legacy class compatibility.
   Design tokens + components live in theme.css (design system).
   ───────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body.app-shell {
  overflow: hidden;
  height: 100%;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fz-14);
  line-height: var(--lh-normal);
  color: var(--text-1);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--selection); }

a { color: var(--text-1); text-decoration: none; }
a:hover { color: var(--text-link-hover); }

button { font-family: inherit; font-size: inherit; }

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--border-strong) 70%, var(--text-3)); }
::-webkit-scrollbar-track { background: transparent; }

/* ─────────────────────── Layout shell (base — enhanced in components/) ─────────────────────── */
.app-shell {
  --shell-sidebar-width: var(--sidebar-width);
  min-height: 100vh;
  height: 100%;
  overflow: hidden;
}
.app-shell.collapsed { --shell-sidebar-width: var(--sidebar-width-collapsed); }

/* Sidebar structure + collapsed mode (behavior preserved) */
.sidebar {
  display: flex;
  flex-direction: column;
  will-change: width;
}
.app-shell.collapsed .sidebar { padding-left: var(--sp-2); padding-right: var(--sp-2); }
.app-shell.collapsed .sidebar .brand > div:not(.logo) { opacity: 0; pointer-events: none; width: 0; overflow: hidden; }
.app-shell.collapsed .sidebar .brand { justify-content: center; padding-left: 0; padding-right: 0; }
.app-shell.collapsed .sidebar .nav-section { opacity: 0; height: 0; margin: 0; padding: 0; overflow: hidden; }
.app-shell.collapsed .sidebar .nav-group-head { opacity: 0; height: 0; margin: 0; padding: 0; overflow: hidden; pointer-events: none; }
.app-shell.collapsed .sidebar .nav-link { justify-content: center; padding-left: 0; padding-right: 0; }
.app-shell.collapsed .sidebar .nav-link > span:not(.ico) {
  opacity: 0; width: 0; overflow: hidden; white-space: nowrap; pointer-events: none;
}
.app-shell.collapsed .sidebar .sidebar-footer { opacity: 0; pointer-events: none; height: 0; padding: 0; overflow: hidden; }
.sidebar .nav-link > span:not(.ico),
.sidebar .brand > div:not(.logo),
.sidebar .nav-section,
.sidebar .nav-group-head,
.sidebar .sidebar-footer {
  transition: opacity var(--t-fast), width var(--t-base);
}
.brand { display: flex; align-items: center; gap: var(--sp-2); }
.brand .logo { display: grid; place-items: center; color: white; font-weight: 700; font-size: 12px; }
.brand .logo img { width: 100%; height: 100%; border-radius: inherit; object-fit: contain; }

.brand--wordmark .logo {
  width: auto;
  max-width: var(--brand-logo-max-width-sidebar);
  height: var(--brand-logo-height-compact);
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.brand--wordmark .brand-logo-mark {
  display: none;
  width: var(--brand-logo-mark-size);
  height: var(--brand-logo-mark-size);
  flex-shrink: 0;
  object-fit: contain;
  object-position: center;
}

.brand--wordmark .brand-logo-wordmark {
  display: block;
  width: auto;
  max-width: 100%;
  height: var(--brand-logo-height-compact);
  object-fit: contain;
  object-position: left center;
  border-radius: 0;
}

.brand--wordmark .logo img.brand-logo-wordmark {
  width: auto;
  max-width: 100%;
  height: var(--brand-logo-height-compact);
  object-fit: contain;
  object-position: left center;
  border-radius: 0;
}

@media (min-width: 640px) {
  .brand--wordmark .logo {
    max-width: min(var(--brand-logo-max-width-lg), calc(var(--sidebar-width, 240px) - 52px));
    height: var(--brand-logo-height-lg);
  }

  .brand--wordmark .brand-logo-wordmark,
  .brand--wordmark .logo img.brand-logo-wordmark {
    height: var(--brand-logo-height-lg);
  }
}

.brand.brand--wordmark > div:not(.logo) {
  display: none;
}

.app-shell.collapsed .brand--wordmark .logo {
  width: var(--brand-logo-mark-size);
  max-width: var(--brand-logo-mark-size);
  height: var(--brand-logo-mark-size);
  justify-content: center;
}

.app-shell.collapsed .brand--wordmark .brand-logo-mark {
  display: block;
}

.app-shell.collapsed .brand--wordmark .brand-logo-wordmark,
.app-shell.collapsed .brand--wordmark .logo img.brand-logo-wordmark {
  display: none;
}
.nav-link { display: flex; align-items: center; gap: var(--sp-2); cursor: pointer; user-select: none; }
.nav-link .ico { display: grid; place-items: center; }
.sidebar-footer { margin-top: auto; }

.search {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0 var(--sp-3);
  max-width: 100%;
}
.search input { flex: 1; background: transparent; border: 0; outline: 0; color: var(--text-1); min-width: 0; }
.search input::placeholder { color: var(--text-3); }
.search .kbd { font-family: var(--font-mono); font-size: var(--fz-11); color: var(--text-3); border: 1px solid var(--border); padding: 1px 5px; border-radius: var(--r-xs); }

.user-menu { display: flex; align-items: center; gap: var(--sp-2); cursor: pointer; }
.user-menu .role { font-size: var(--fz-11); color: var(--text-3); }

/* Avatar sizes */
.avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--bg-elev-3);
  color: var(--text-1);
  font-weight: 600;
  font-size: var(--fz-11);
  display: inline-grid;
  place-items: center;
  flex: 0 0 28px;
  border: 1px solid var(--border-subtle);
}
.avatar.sm { width: 20px; height: 20px; font-size: 10px; flex: 0 0 20px; }
.avatar.lg { width: 36px; height: 36px; font-size: var(--fz-12); flex: 0 0 36px; }
.avatar.xl { width: 44px; height: 44px; font-size: var(--fz-13); flex: 0 0 44px; }
.avatar img { width: 100%; height: 100%; border-radius: inherit; object-fit: cover; }

.muted { color: var(--text-3); }
.divider { height: 1px; background: var(--border-subtle); margin: var(--sp-3) 0; border: 0; }
.page-header .spacer { flex: 1; }

/* Button compat — variants in components/buttons.css */
.btn {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn[disabled], .btn.disabled { opacity: .5; cursor: not-allowed; }
.btn.full { width: 100%; justify-content: center; }
.btn .ico { display: inline-grid; place-items: center; width: 14px; height: 14px; }
.icon-btn { display: inline-grid; place-items: center; border: 1px solid transparent; background: transparent; cursor: pointer; color: var(--icon-default); }
.icon-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }

.card.flat { background: transparent; }

.field textarea, textarea.input { height: auto; resize: vertical; }
.field .hint { font-size: var(--fz-12); color: var(--text-3); }
.field .err  { font-size: var(--fz-12); color: var(--color-danger); }

.table { width: 100%; border-collapse: separate; border-spacing: 0; }
.table tr.row-clickable { cursor: pointer; }

/* ─────────────────────── Pills, badges ─────────────────────── */
.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text-2);
  border-radius: 999px;
  font-size: var(--fz-11);
  font-weight: 500;
}
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  --pill-accent: var(--c, var(--text-2));
  background: color-mix(in srgb, var(--pill-accent) 14%, transparent);
  color: color-mix(in srgb, var(--pill-accent) var(--status-pill-fg-mix, 42%), var(--text-1));
  font-size: var(--fz-11);
  font-weight: 500;
  letter-spacing: 0;
  text-transform: capitalize;
  border: 1px solid color-mix(in srgb, var(--pill-accent) 30%, var(--border-subtle));
  white-space: nowrap;
}
.status-pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: color-mix(in srgb, var(--pill-accent) var(--status-pill-dot-mix, 58%), var(--text-1));
}

.user-tag {
  display: inline-flex; align-items: center;
  padding: 2px 8px; margin: 1px 2px;
  border-radius: 999px;
  font-size: var(--fz-11); font-weight: 500;
  background: color-mix(in srgb, var(--tag-color, #64748B) 16%, transparent);
  color: var(--tag-color, #64748B);
  border: 1px solid color-mix(in srgb, var(--tag-color, #64748B) 32%, transparent);
  white-space: nowrap;
}

.priority-tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: var(--fz-12); color: var(--text-2);
}
.priority-tag::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--pc, var(--text-3));
}

.kbd {
  font-family: var(--font-mono); font-size: var(--fz-11);
  border: 1px solid var(--border); border-bottom-width: 2px;
  padding: 1px 5px; border-radius: 4px; color: var(--text-2);
}

/* Tab panels inside cards (Settings, Reports, etc.) */
.card .tab-panels-wrap {
  min-width: 0;
}

.card .tab-panels-wrap .tabs {
  padding: 0 var(--sp-2);
}

.tab-panels > .panel { display: none; padding-top: var(--sp-4); }
.tab-panels > .panel.active { display: block; }
.card .tab-panels-wrap .tab-panels > .panel {
  padding: var(--sp-4);
  padding-top: var(--sp-4);
}

/* ─────────────────────── Dropdown — styles in components/overlays.css ─────────────────────── */

/* ─────────────────────── Kanban (structure + task card details) ─────────────────────── */
.kanban-wrap { overflow-x: auto; touch-action: pan-x pan-y; -webkit-overflow-scrolling: touch; }
.kanban { display: flex; gap: var(--sp-3); align-items: flex-start; min-height: 200px; }
.kanban-column {
  display: flex; flex-direction: column;
  max-height: calc(100vh - 200px);
}
.kanban-column .col-head {
  position: sticky; top: 0; z-index: 2;
  background: var(--kanban-col-bg);
  display: flex; align-items: center; gap: var(--sp-2);
}
.kanban-column .col-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--col-c, var(--text-3)); }
.kanban-column .col-body {
  padding: var(--sp-2); display: flex; flex-direction: column; gap: var(--sp-2);
  overflow-y: auto; flex: 1;
}
.task-card .meta { display: flex; align-items: center; gap: 6px; font-size: var(--fz-11); color: var(--text-3); }
.task-card .code { font-family: var(--font-mono); }
.task-card .title {
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.task-card .footer { display: flex; align-items: center; gap: 8px; font-size: var(--fz-11); color: var(--text-3); }
.task-card .footer .right { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; }
.task-card .labels { display: flex; flex-wrap: wrap; gap: 4px; }
.task-card .labels .tag { padding: 1px 6px; font-size: 10px; }

/* ─────────────────────── Coins / points card (student dashboard) ─────────────────────── */
.coins-card { padding: var(--sp-4); overflow: hidden; position: relative; }
.coins-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(120% 80% at 100% 0%, color-mix(in srgb, var(--color-warning) 14%, transparent) 0%, transparent 60%);
  pointer-events: none;
}
.coins-card-head {
  display: flex; align-items: center; gap: var(--sp-4); padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border-subtle); position: relative;
}
.coins-amount {
  display: inline-flex; align-items: baseline; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--coin-amount-bg);
  color: var(--coin-amount-fg); font-weight: 700;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--color-warning) 25%, transparent);
}
.coins-amount .coin { font-size: 18px; line-height: 1; }
.coins-amount .num  { font-size: 22px; line-height: 1; }
.coins-amount .lbl  { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; opacity: .85; }
.coins-meta { flex: 1; min-width: 0; }
.coins-card-body {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--sp-4); padding-top: var(--sp-3);
  position: relative;
}
@media (max-width: 700px) { .coins-card-body { grid-template-columns: 1fr; } }
.coins-card-body h4 {
  margin: 0 0 var(--sp-2); font-size: var(--fz-12); text-transform: uppercase;
  letter-spacing: .04em; color: var(--text-3);
}
.coins-row {
  display: flex; align-items: center; gap: 10px; padding: 8px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.coins-row:last-child { border-bottom: 0; }
.coins-row-amt {
  flex: 0 0 auto; min-width: 44px; text-align: center;
  padding: 3px 8px; border-radius: 8px;
  background: var(--coin-accent-bg);
  color: var(--coin-accent-fg); font-weight: 700; font-size: var(--fz-13);
}
.coins-row-task { font-weight: 500; color: var(--text-1); font-size: var(--fz-13); }
.coins-row-meta { font-size: var(--fz-11); }
.coins-int { margin-bottom: var(--sp-2); }
.coins-int-row { display: flex; align-items: center; justify-content: space-between; font-size: var(--fz-12); }
.coins-int-name { color: var(--text-2); }
.coins-int-amt  { color: var(--text-1); font-weight: 600; }
.coins-int-bar  { height: 4px; background: var(--bg-elev-3); border-radius: 4px; overflow: hidden; margin-top: 4px; }
.coins-int-bar .fill { height: 100%; background: var(--coin-bar-fill); transition: width 200ms ease; }

/* Top-bar coin pill (visible to students next to the bell). */
.coin-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  background: var(--coin-accent-bg);
  color: var(--coin-accent-fg); font-weight: 600; font-size: var(--fz-12);
  border: 1px solid color-mix(in srgb, var(--color-warning) 35%, transparent);
}
.coin-pill .coin { font-size: 14px; line-height: 1; }

/* ─────────────────────── Gamification / rank widgets ─────────────────────── */
.rank-section { margin-top: var(--sp-4); }
.rank-section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--sp-3);
}
.rank-section-head h3 { margin: 0; font-size: var(--fz-14); font-weight: 600; }
.rank-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: var(--sp-3);
}
@media (max-width: 1100px) { .rank-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); } }
@media (max-width: 560px)  { .rank-grid { grid-template-columns: 1fr; } }
.rank-widget {
  padding: var(--sp-3); border: 1px solid var(--border); border-radius: var(--r-md);
  background: var(--bg); display: flex; flex-direction: column; gap: var(--sp-2);
  min-height: 140px;
}
.rank-widget .rw-label {
  font-size: var(--fz-11); text-transform: uppercase; letter-spacing: .06em;
  color: var(--text-3); font-weight: 600;
}
.rank-widget .rw-value { font-size: 22px; font-weight: 700; color: var(--text-1); line-height: 1.2; }
.rank-widget .rw-sub { font-size: var(--fz-12); color: var(--text-3); }
.rank-widget.rank-primary {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--bg) 0%, color-mix(in srgb, var(--accent) 6%, var(--bg)) 100%);
}
@media (max-width: 1100px) { .rank-widget.rank-primary { grid-column: span 2; } }
@media (max-width: 560px)  { .rank-widget.rank-primary { grid-column: span 1; } }
.rank-badge-row { display: flex; align-items: center; gap: 10px; }
.rank-badge-icon { font-size: 28px; line-height: 1; }
.rank-progress-bar {
  height: 6px; background: var(--bg-elev-3); border-radius: 6px; overflow: hidden; margin-top: 4px;
}
.rank-progress-bar .fill {
  height: 100%; background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 70%, var(--color-warning)));
  transition: width 400ms ease;
}
.rank-ring-wrap { display: flex; align-items: center; gap: var(--sp-3); }
.rank-ring {
  width: 72px; height: 72px; flex-shrink: 0;
}
.rank-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.rank-ring .track { fill: none; stroke: var(--bg-elev-3); stroke-width: 6; }
.rank-ring .prog { fill: none; stroke: var(--accent); stroke-width: 6; stroke-linecap: round; transition: stroke-dashoffset 400ms ease; }
.rank-ach-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.rank-ach-list li {
  display: flex; align-items: center; gap: 8px; font-size: var(--fz-13); color: var(--text-2);
}
.rank-ach-list .ach-icon { font-size: 16px; }
.achievements-panel {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.ach-badge {
  padding: var(--sp-3); border: 1px solid var(--border); border-radius: var(--r-md);
  text-align: center; background: var(--bg);
}
.ach-badge.locked { opacity: .45; filter: grayscale(.6); }
.ach-badge .ach-icon { font-size: 28px; display: block; margin-bottom: 6px; }
.ach-badge .ach-title { font-size: var(--fz-12); font-weight: 600; color: var(--text-1); }
.ach-badge .ach-desc { font-size: var(--fz-11); color: var(--text-3); margin-top: 2px; }
.coin-float {
  position: fixed; z-index: 200; pointer-events: none;
  padding: 6px 14px; border-radius: 999px;
  background: color-mix(in srgb, var(--color-warning) 90%, var(--bg-elev-1));
  color: var(--coin-amount-fg); font-weight: 700; font-size: var(--fz-13);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-warning) 35%, transparent);
  animation: coin-float-up 1.8s ease forwards;
}
@keyframes coin-float-up {
  0%   { opacity: 0; transform: translateY(8px) scale(.95); }
  15%  { opacity: 1; transform: translateY(0) scale(1); }
  85%  { opacity: 1; transform: translateY(-24px) scale(1); }
  100% { opacity: 0; transform: translateY(-36px) scale(.98); }
}
.leaderboard-table .lb-rank { font-weight: 700; color: var(--text-3); width: 48px; }
.leaderboard-table .lb-coins { font-weight: 700; color: var(--coin-accent-fg); }
.leaderboard-table .lb-level { white-space: nowrap; }
.leaderboard-table .lb-badge { font-size: 18px; margin-right: 4px; }
.gam-rank-table td, .gam-rank-table th { vertical-align: middle; }
.gam-rank-table .drag-handle { cursor: grab; color: var(--text-3); user-select: none; }
.gam-analytics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}
@media (max-width: 900px) { .gam-analytics-grid { grid-template-columns: 1fr; } }
.gam-dist-bar { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-size: var(--fz-12); }
.gam-dist-bar .bar { flex: 1; height: 6px; background: var(--bg-elev-3); border-radius: 4px; overflow: hidden; }
.gam-dist-bar .fill { height: 100%; background: var(--accent); }

/* ─────────────────────── Drawer ─────────────────────── */
.drawer-overlay {
  position: fixed; inset: 0;
  background: var(--bg-overlay);
  opacity: 0; pointer-events: none;
  transition: opacity var(--t-base);
  z-index: 80;
}
.drawer-overlay.open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: min(920px, 100%);
  background: var(--bg-elev-1);
  border-left: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform var(--t-base);
  z-index: 90;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-popover);
}
.drawer.open { transform: translateX(0); }

/* Fullscreen task drawer — toggled by the ⛶ button (or `F` key). Expands
   the side panel to fill the viewport and centers the content column for
   distraction-free editing. */
.drawer.fullscreen {
  width: 100%;
  max-width: 100%;
  left: 0;
  right: 0;
  border-left: 0;
  box-shadow: none;
}

.drawer.fullscreen .drawer-head {
  padding-left: var(--sp-6);
  padding-right: var(--sp-6);
}

.drawer.fullscreen .drawer-body {
  padding-left: var(--sp-6);
  padding-right: var(--sp-6);
}

.drawer.fullscreen .drawer-title-row,
.drawer.fullscreen .drawer-desc-row,
.drawer.fullscreen .drawer-section,
.drawer.fullscreen .task-view {
  max-width: none;
  width: 100%;
  margin-left: 0;
  margin-right: 0;
}
.drawer.fullscreen .drawer-title { font-size: var(--fz-24); }
.drawer-head {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border-subtle);
  display: flex; align-items: center; gap: var(--sp-2);
}
.drawer-head .code { font-family: var(--font-mono); color: var(--text-3); font-size: var(--fz-12); }
.drawer-head .code.drawer-code-readonly {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--r-sm);
  background: var(--bg-muted);
  border: 1px solid var(--border-subtle);
  color: var(--text-2);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  cursor: default;
  user-select: text;
}
.drawer-head .actions { display: flex; gap: 4px; margin-left: auto; }

.drawer-body { flex: 1; overflow-y: auto; }
.drawer-title-row { padding: var(--sp-4) var(--sp-4) var(--sp-3); }
.drawer-desc-row {
  padding: 0 var(--sp-4) var(--sp-4);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.drawer-desc-row .task-desc-hero {
  margin-bottom: 0;
}
.drawer-desc-row .task-desc-body {
  min-height: 3rem;
}
.drawer-desc-row .task-desc-editor-wrap.is-embedded,
.drawer-desc-row .task-desc-editor-wrap:not(.has-preview) {
  min-height: 200px;
}
.drawer-desc-row textarea.input.task-desc-textarea {
  min-height: 200px;
}
.drawer-title { width: 100%; background: transparent; border: 0; outline: 0; color: var(--text-1); font-size: var(--fz-18); font-weight: 600; padding: 0; line-height: 1.3; }
.drawer-title:focus { color: var(--text-1); }

/* Click-to-edit kv rows in the task drawer. Both admin and student see the
   same pretty pills; admins can click a row to swap in the edit control. */
.kv .v.editable [data-display] {
  cursor: pointer; padding: 1px 4px; margin: -1px -4px; border-radius: var(--r-sm);
  transition: background 100ms ease;
}
.kv .v.editable [data-display]:hover { background: var(--bg-elev-2); }
.kv .v.editable [data-display]::after {
  content: '✎'; opacity: 0; margin-left: 6px; color: var(--text-3); font-size: 11px;
  transition: opacity 100ms ease;
}
.kv .v.editable [data-display]:hover::after { opacity: 0.7; }

/* Student-facing "Submit your work" banner — sits above the tabs so it's
   the first action a student sees on a task. */
.drawer-submit-top {
  margin: 0 var(--sp-4) var(--sp-3);
  padding: var(--sp-3);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg));
}
.drawer-submit-top h4 {
  margin: 0 0 var(--sp-2); font-size: var(--fz-13);
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-1);
}

.drawer-section { padding: 0 var(--sp-4) var(--sp-4); }
.drawer-section h4 {
  margin: 0 0 var(--sp-2);
  font-size: var(--fz-11); text-transform: uppercase; letter-spacing: .06em;
  color: var(--text-3); font-weight: 600;
}

/* .kv layout — components/tables.css */

.subtask { display: flex; align-items: center; gap: 8px; padding: 4px 6px; border-radius: var(--r-sm); }
.subtask:hover { background: var(--bg-elev-3); }
.subtask.done .text { color: var(--text-3); text-decoration: line-through; }
.subtask input[type="checkbox"] { accent-color: var(--accent); }

.attachment {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border-subtle); border-radius: var(--r-md);
  background: var(--bg-elev-2);
  font-size: var(--fz-13);
}
.attachment .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.attachment .size { color: var(--text-3); font-size: var(--fz-12); }

.comment {
  padding: var(--sp-3);
  border: 1px solid var(--border-subtle); border-radius: var(--r-md);
  background: var(--bg-elev-2);
  margin-bottom: var(--sp-2);
}
.comment .head { display: flex; align-items: center; gap: var(--sp-2); margin-bottom: 6px; font-size: var(--fz-12); color: var(--text-3); }
.comment .body { font-size: var(--fz-13); color: var(--text-1); white-space: pre-wrap; word-wrap: break-word; }

.timeline { display: flex; flex-direction: column; gap: 8px; }
.timeline-item { display: grid; grid-template-columns: 14px 1fr; gap: var(--sp-2); padding: 4px 0; font-size: var(--fz-12); }
.timeline-item .bullet { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); margin-top: 6px; }
.timeline-item .text { color: var(--text-2); }
.timeline-item .text strong { color: var(--text-1); font-weight: 500; }
.timeline-item .when { color: var(--text-3); font-size: var(--fz-11); }

/* ─────────────────────── Modal ─────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: var(--bg-overlay);
  display: none; align-items: center; justify-content: center;
  z-index: 100;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  width: min(580px, 92vw);
  box-shadow: var(--shadow-popover);
  display: flex; flex-direction: column;
  max-height: 90vh;
}
.modal .head {
  padding: var(--sp-4) var(--sp-5); border-bottom: 1px solid var(--border-subtle);
  display: flex; align-items: center; gap: var(--sp-2);
  flex-shrink: 0;
}
.modal .head h3 { margin: 0; font-size: var(--fz-16); font-weight: var(--fw-semibold); font-family: var(--font-display); }
.modal .body { padding: var(--sp-5); overflow-y: auto; flex: 1; min-height: 0; }
.modal .actions { padding: var(--sp-4) var(--sp-5); border-top: 1px solid var(--border-subtle); display: flex; justify-content: flex-end; gap: var(--sp-3); flex-shrink: 0; }

/* Large + fullscreen modal variants. */
.modal-overlay.large .modal { width: min(880px, 96vw); max-height: 92vh; }

.modal-overlay.fullscreen {
  background: var(--bg-app, var(--bg));
  align-items: stretch;
  justify-content: stretch;
  padding: 0;
}

.modal-overlay.fullscreen .modal {
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  margin: 0;
}

.modal-overlay.fullscreen .modal .head {
  padding: var(--sp-4) var(--sp-6);
  flex-shrink: 0;
}

.modal-overlay.fullscreen .modal .body {
  flex: 1;
  min-height: 0;
  max-width: none;
  margin: 0;
  width: 100%;
  padding: var(--sp-4) var(--sp-6);
  align-items: stretch;
  display: flex;
  flex-direction: column;
}

.modal-overlay.fullscreen .modal .body > * {
  width: 100%;
  max-width: none;
}

.modal-overlay.fullscreen .modal .body pre {
  flex: 1;
  min-height: 0;
  max-height: none !important;
  overflow: auto;
  margin: 0;
  width: 100%;
}

.modal .body pre.modal-json-pre,
.modal .body pre.code-block {
  max-height: 50vh;
  overflow: auto;
  font-size: var(--fz-11);
  white-space: pre-wrap;
  font-family: var(--font-mono);
  background: var(--bg-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: var(--sp-4);
  margin: 0;
}

.modal-overlay.fullscreen .modal .body pre.modal-json-pre,
.modal-overlay.fullscreen .modal .body pre.code-block {
  max-height: none;
  flex: 1;
  min-height: 0;
}

.modal-overlay.fullscreen .modal .body [style*="max-height"] {
  max-height: none !important;
  flex: 1;
  min-height: 0;
  overflow: auto;
}

.modal-overlay.fullscreen .modal .actions {
  max-width: none;
  margin: 0;
  width: 100%;
  padding: var(--sp-4) var(--sp-6);
  flex-shrink: 0;
  justify-content: flex-end;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-elev-1);
}

/* ─────────────────────── Toast ─────────────────────── */
.toast-wrap {
  position: fixed; bottom: var(--sp-4); right: var(--sp-4);
  display: flex; flex-direction: column; gap: 8px; z-index: 200;
}
.toast {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: 10px var(--sp-3);
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-popover);
  font-size: var(--fz-13);
  min-width: 240px;
  animation: tslide var(--t-base);
}
.toast.success { border-left: 2px solid var(--color-success); }
.toast.error   { border-left: 2px solid var(--color-danger); }
.toast.info    { border-left: 2px solid var(--accent); }
@keyframes tslide { from { transform: translateY(8px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ─────────────────────── Auth pages ─────────────────────── */
.auth-page {
  min-height: 100vh; display: grid; place-items: center;
  background: var(--bg-app);
  padding: var(--sp-6);
}
.auth-card {
  width: min(380px, 100%);
  background: var(--bg-elev-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  padding: var(--sp-6);
}
.auth-card h2 { margin: 0 0 4px; font-size: var(--fz-18); font-weight: 600; }
.auth-card .auth-sub { color: var(--text-3); font-size: var(--fz-13); margin-bottom: var(--sp-4); }

/* ─────────────────────── Misc ─────────────────────── */
.empty { padding: var(--sp-6); text-align: center; color: var(--text-3); border: 1px dashed var(--border); border-radius: var(--r-md); }
.flex { display: flex; }
.gap-2 { gap: var(--sp-2); } .gap-3 { gap: var(--sp-3); } .gap-4 { gap: var(--sp-4); }
.items-center { align-items: center; }
.justify-end { justify-content: flex-end; }
.mt-2 { margin-top: var(--sp-2); } .mt-3 { margin-top: var(--sp-3); } .mt-4 { margin-top: var(--sp-4); }
.hidden { display: none !important; }
.full-width { width: 100%; }
.spacer { flex: 1; }

.color-swatch { width: 14px; height: 14px; border-radius: 4px; border: 1px solid var(--border); display: inline-block; }

/* Skeletons */
.skel { background: var(--bg-elev-3); border-radius: var(--r-sm); height: 12px; animation: pulse 1.2s infinite; }
@keyframes pulse { 0% { opacity: 1; } 50% { opacity: .55; } 100% { opacity: 1; } }

/* Sidebar overlay (tablet + mobile). Sits between the sidebar and the
   page content; tapping it closes the slide-in sidebar. Hidden on
   desktop where the sidebar is part of the grid layout. */
.sidebar-overlay {
  position: fixed; inset: 0;
  background: var(--bg-overlay);
  opacity: 0; pointer-events: none;
  transition: opacity var(--t-base);
  z-index: 85;
}
.sidebar-overlay.open { opacity: 1; pointer-events: auto; }

/* Responsive — TABLET (slide-in sidebar overlay). Main stays full width;
   sidebar slides in from the left over content. */
@media (max-width: 1024px) {
  .app-shell { --shell-sidebar-width: 0; }
  .main { margin-left: 0; width: 100%; }
  .sidebar {
    position: fixed; top: 0; bottom: 0; left: 0;
    width: 260px;
    height: 100vh;
    transform: translateX(-100%);
    z-index: 90;
    transition: transform var(--t-base);
    box-shadow: 4px 0 16px rgba(0,0,0,0.12);
  }
  .sidebar.open { transform: translateX(0); }
  /* On tablet/mobile the collapsed-icon styles are NOT applied — slide-in
     wins. Reset the collapse-only rules. */
  .app-shell.collapsed .sidebar .nav-link > span:not(.ico),
  .app-shell.collapsed .sidebar .brand > div:not(.logo),
  .app-shell.collapsed .sidebar .nav-section,
  .app-shell.collapsed .sidebar .nav-group-head,
  .app-shell.collapsed .sidebar .sidebar-footer {
    opacity: 1; width: auto; height: auto; padding: revert; pointer-events: auto;
    overflow: visible;
  }
  .app-shell.collapsed .sidebar .nav-link { justify-content: flex-start; padding-left: var(--sp-2); padding-right: var(--sp-2); }
  .app-shell.collapsed .sidebar .brand { justify-content: flex-start; padding-left: var(--sp-3); }
}

/* MOBILE — sidebar takes most of the viewport, full overlay backdrop. */
@media (max-width: 640px) {
  .sidebar { width: min(86vw, 320px); }
  .topbar { padding: 0 var(--sp-3); }
  .search { width: 140px; }
  .content { padding: var(--sp-3); }
  .kanban-column { flex-basis: 84vw; }
  .row { grid-template-columns: 1fr; }
  .row.three { grid-template-columns: 1fr; }
}

/* Focus-visible everywhere */
*:focus-visible { outline: none; box-shadow: var(--focus-ring); }


/* ─── Docs / knowledge base ──────────────────────────────────────────── */
.docs-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr) 200px; gap: var(--sp-3); align-items: start; }
/* Drop the right-rail TOC first; the tree is more important. */
@media (max-width: 1240px) { .docs-layout { grid-template-columns: 220px minmax(0, 1fr); } .docs-toc { display: none; } }
/* Below 700 (small tablet/phone) we collapse to a single column. The tree
   stacks ABOVE the content rather than disappearing so users still have a
   way to navigate between docs. */
@media (max-width: 700px)  { .docs-layout { grid-template-columns: 1fr; }
                             .docs-tree   { position: static; max-height: 260px; } }

.docs-tree { position: sticky; top: var(--sp-4); max-height: calc(100vh - 120px); overflow: auto;
             padding: var(--sp-3); background: var(--bg-elev-1); border: 1px solid var(--border-subtle); border-radius: 10px; }
.docs-tree .cat { margin: var(--sp-2) 0 4px; font-size: var(--fz-11); text-transform: uppercase; letter-spacing: .5px; color: var(--text-3); }
.docs-tree a.doc { display: block; padding: 5px 8px; border-radius: 6px; color: var(--text-1); text-decoration: none; font-size: var(--fz-13); }
.docs-tree a.doc:hover  { background: var(--bg-muted); }
.docs-tree a.doc.active { background: color-mix(in srgb, var(--text-link) 14%, transparent); color: var(--text-link); font-weight: 600; }
.docs-tree .draft-pill  { font-size: 9px; background: var(--pill-warning-bg); color: var(--pill-warning-fg); padding: 1px 5px; border-radius: 999px; margin-left: 6px; }

.docs-typeswitch { display: flex; gap: 4px; padding: 4px; background: var(--bg-muted); border-radius: 8px; margin-bottom: var(--sp-3); }
.docs-typeswitch button { flex: 1; padding: 6px 10px; border: 0; background: transparent; border-radius: 6px; color: var(--text-2); font-weight: 500; cursor: pointer; }
.docs-typeswitch button.active { background: var(--bg-elev-1); color: var(--text-1); box-shadow: 0 1px 2px rgba(0,0,0,.05); }

.docs-toc  { position: sticky; top: var(--sp-4); max-height: calc(100vh - 120px); overflow: auto; padding-left: var(--sp-2); border-left: 1px solid var(--border-subtle); }
.docs-toc .title { font-size: var(--fz-11); text-transform: uppercase; color: var(--text-3); margin-bottom: 8px; }
.docs-toc a { display: block; padding: 3px 0; color: var(--text-2); font-size: var(--fz-12); text-decoration: none; }
.docs-toc a.lvl-3 { padding-left: 14px; color: var(--text-3); }
.docs-toc a:hover, .docs-toc a.active { color: var(--text-link); }

.docs-content { background: var(--bg-elev-1); border: 1px solid var(--border-subtle); border-radius: 10px;
                padding: var(--sp-5); line-height: 1.7; }
.docs-content > *:first-child { margin-top: 0; }
.docs-content > *:last-child  { margin-bottom: 0; }
.docs-content h1, .docs-content h2, .docs-content h3, .docs-content h4 { font-weight: 700; line-height: 1.3; margin: var(--sp-4) 0 var(--sp-2); position: relative; }
.docs-content h1 { font-size: 28px; }
.docs-content h2 { font-size: 21px; border-bottom: 1px solid var(--border-subtle); padding-bottom: 6px; }
.docs-content h3 { font-size: 17px; }
.docs-content p, .docs-content ul, .docs-content ol, .docs-content blockquote, .docs-content table, .docs-content pre { margin: var(--sp-2) 0; }
.docs-content ul, .docs-content ol { padding-left: 24px; }
.docs-content li { margin: 4px 0; }
.docs-content li.docs-task { list-style: none; margin-left: -20px; }
.docs-content blockquote { padding: 8px 14px; border-left: 3px solid var(--accent);
                           background: color-mix(in srgb, var(--accent) 8%, transparent); color: var(--text-2); border-radius: 0 6px 6px 0; }
.docs-content code { font-family: var(--font-mono); font-size: .92em; background: var(--code-inline-bg); padding: 1px 6px; border-radius: 4px; color: var(--text-primary); }
.docs-content pre.docs-code { background: var(--code-bg); color: var(--code-fg); padding: 0; border-radius: 8px; overflow: hidden; border: 1px solid var(--border-subtle); }
.docs-content pre.docs-code code { background: transparent; padding: 12px 14px; display: block; overflow-x: auto; color: inherit; font-size: 13px; line-height: 1.55; }
.docs-content .docs-code-bar { display: flex; align-items: center; padding: 4px 8px 4px 12px; background: var(--code-bar-bg); font-size: 11px; }
.docs-content .docs-code-lang { color: var(--code-bar-fg); font-family: var(--font-mono); margin-right: auto; text-transform: uppercase; letter-spacing: .5px; }
.docs-content .docs-copy { background: transparent; border: 1px solid var(--code-bar-border); color: var(--code-fg); border-radius: 4px; padding: 2px 8px; font-size: 11px; cursor: pointer; }
.docs-content .docs-copy:hover { background: var(--code-bar-bg); }
.docs-content details.docs-details { border: 1px solid var(--border-subtle); border-radius: 8px; padding: 8px 12px; background: var(--bg-muted); }
.docs-content table.docs-table { width: 100%; border-collapse: collapse; font-size: var(--fz-13); }
.docs-content table.docs-table th,
.docs-content table.docs-table td { border: 1px solid var(--border-subtle); padding: 8px 10px; text-align: left; color: var(--text-primary); }
.docs-content table.docs-table thead th { background: var(--bg-muted); }
.docs-content .docs-anchor { color: var(--text-3); text-decoration: none; opacity: 0; padding-right: 6px; }
.docs-content .docs-h:hover .docs-anchor { opacity: 1; }
.docs-content details.docs-details > summary { cursor: pointer; font-weight: 600; color: var(--text-primary); }

.docs-header { display: flex; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-2); }
.docs-header h1 { margin: 0; font-size: 22px; flex: 1; color: var(--text-primary); }
.docs-meta { color: var(--text-3); font-size: var(--fz-12); margin-bottom: var(--sp-3); }
.docs-fav  { background: transparent; border: 0; cursor: pointer; font-size: 18px; padding: 4px; color: var(--text-3); }
.docs-fav.on { color: var(--color-warning); }
.docs-actions { display: flex; gap: 4px; }

.docs-search-result { padding: 10px 12px; border-bottom: 1px solid var(--border-subtle); }
.docs-search-result h4 { margin: 0 0 4px; font-size: var(--fz-14); color: var(--text-primary); }
.docs-search-result .crumbs { color: var(--text-3); font-size: var(--fz-12); margin-bottom: 4px; }
.docs-search-result mark { background: color-mix(in srgb, var(--accent) 25%, transparent); color: inherit; padding: 0 2px; border-radius: 3px; }

.docs-editor { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
@media (max-width: 1000px) { .docs-editor { grid-template-columns: 1fr; } }
.docs-editor textarea { width: 100%; min-height: 60vh; font-family: var(--font-mono); font-size: 13px; line-height: 1.6;
                        padding: 14px; border-radius: 8px; border: 1px solid var(--border-subtle); background: var(--bg-elev-1); resize: vertical; }
.docs-editor-tools { display: flex; gap: 4px; flex-wrap: wrap; padding: 6px 8px; background: var(--bg-muted); border: 1px solid var(--border-subtle); border-radius: 8px 8px 0 0; border-bottom: 0; }
.docs-editor-tools button { background: transparent; border: 0; padding: 4px 8px; border-radius: 4px; cursor: pointer; font-size: var(--fz-12); color: var(--text-2); }
.docs-editor-tools button:hover { background: var(--bg-elev-1); color: var(--text-1); }

/* ─── Product Knowledge Center ───────────────────────────────────────── */
.kc-section-switch { flex-wrap: wrap; max-width: 100%; }
.kc-section-switch button { flex: 0 1 auto; min-width: 100px; font-size: var(--fz-12); padding: 6px 8px; }

/* Hub: tree | widgets | reader | toc */
.kc-hub-layout {
  display: grid;
  grid-template-columns: 220px minmax(280px, 360px) minmax(0, 1fr) 180px;
  gap: var(--sp-3);
  align-items: start;
  min-height: calc(100vh - 200px);
}
@media (max-width: 1280px) {
  .kc-hub-layout { grid-template-columns: 200px minmax(260px, 320px) minmax(0, 1fr); }
  .kc-hub-layout .kc-toc { display: none; }
}
@media (max-width: 960px) {
  .kc-hub-layout { grid-template-columns: 1fr 1fr; }
  .kc-nav { grid-column: 1 / -1; }
  .kc-nav .kc-tree { max-height: 200px; }
  .kc-widgets { max-height: 420px; }
  .kc-reader { grid-column: 1 / -1; position: static; max-height: none; }
}
@media (max-width: 640px) {
  .kc-hub-layout { grid-template-columns: 1fr; }
  .kc-widgets { max-height: none; }
}

.kc-nav { position: sticky; top: var(--sp-4); display: flex; flex-direction: column; gap: var(--sp-2); min-width: 0; }
.kc-nav-search { display: flex; flex-direction: column; gap: 6px; }
.kc-nav-search .input { width: 100%; }
.kc-tree { position: static; max-height: calc(100vh - 200px); margin: 0; }
.kc-tree-icon { margin-right: 4px; }
.kc-tree .cat { cursor: pointer; }
.kc-tree .cat:hover { color: var(--text-link); }

.kc-widgets {
  position: sticky; top: var(--sp-4);
  max-height: calc(100vh - 160px); overflow-y: auto;
  padding-right: 4px; scrollbar-gutter: stable;
}
.kc-widget-section { margin-bottom: var(--sp-4); }
.kc-widget-section--featured {
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--sp-3);
}
.kc-widget-heading {
  margin: 0 0 var(--sp-2);
  font-size: var(--fz-11);
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-3);
  font-weight: 600;
}
.kc-cards--stack { display: flex; flex-direction: column; gap: var(--sp-2); }

.kc-reader {
  min-width: 0; position: sticky; top: var(--sp-4);
  max-height: calc(100vh - 160px); overflow-y: auto;
}
.kc-reader-card { padding: var(--sp-4) var(--sp-5); }
.kc-reader-header { display: flex; flex-direction: column; gap: var(--sp-2); margin-bottom: var(--sp-3); }
.kc-reader-top { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2); min-width: 0; }
.kc-reader-title { margin: 0; font-size: 22px; line-height: 1.3; word-break: break-word; }
.kc-reader-crumbs { font-size: var(--fz-11); text-transform: uppercase; letter-spacing: .4px; min-width: 0; }
.kc-reader-excerpt { margin: 0; font-size: var(--fz-14); line-height: 1.5; max-width: 72ch; }
.kc-reader-actions { display: flex; gap: 6px; flex-shrink: 0; margin-left: auto; }
.kc-reader-body { border: 0; padding: 0; background: transparent; }
.kc-reader-welcome, .kc-reader-loading {
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  min-height: 360px; padding: var(--sp-5);
  border: 1px dashed var(--border-subtle); border-radius: 12px;
  background: linear-gradient(145deg, var(--bg-elev-1), color-mix(in srgb, var(--accent) 4%, var(--bg-elev-1)));
}
.kc-reader-welcome h2 { margin: var(--sp-2) 0 var(--sp-1); font-size: 20px; }
.kc-welcome-icon { font-size: 40px; line-height: 1; opacity: .85; }
.kc-hub-layout--two { grid-template-columns: 280px minmax(0, 1fr); }
.kc-hub-layout--two .kc-reader { grid-column: auto; position: static; max-height: none; }
.kc-arch-layout { min-height: auto; align-items: stretch; }
.kc-arch-reader { display: flex; flex-direction: column; min-width: 0; }
.kc-arch-card {
  display: flex; flex-direction: column; gap: var(--sp-3);
  flex: 1; min-height: 0; padding: var(--sp-4) var(--sp-5);
}
.kc-arch-header { flex-shrink: 0; }
.kc-arch-header .kc-reader-title { margin: 0; }
.kc-arch-header .kc-reader-excerpt { margin: var(--sp-1) 0 0; color: var(--text-3); }
.kc-arch-loading { padding: var(--sp-4); text-align: center; }
.kc-diagram-host { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.kc-diagram-host .diagram-viewport {
  display: flex; flex-direction: column; flex: 1;
  min-height: min(68vh, 760px);
}
.kc-diagram-host .diagram-canvas-wrap {
  flex: 1; min-height: 360px; max-height: none;
}
.kc-toc { position: sticky; top: var(--sp-4); max-height: calc(100vh - 120px); overflow: auto; }

.kc-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--sp-3); }
.kc-card {
  display: flex; gap: var(--sp-3); padding: var(--sp-3); width: 100%; text-align: left;
  border: 1px solid var(--border-subtle); border-radius: 12px;
  color: var(--text-1); background: var(--bg-elev-1);
  cursor: pointer; font: inherit;
  transition: border-color .15s, box-shadow .15s, transform .08s;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.kc-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border-subtle));
  box-shadow: 0 4px 12px rgba(0,0,0,.06);
  transform: translateY(-1px);
}
.kc-card.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-elev-1));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}
.kc-card--featured {
  background: linear-gradient(135deg, var(--bg-elev-1), color-mix(in srgb, var(--accent) 6%, var(--bg-elev-1)));
}
.kc-card-icon {
  font-size: 26px; line-height: 1; flex-shrink: 0;
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  background: var(--bg-2); border-radius: 10px;
}
.kc-card.active .kc-card-icon { background: color-mix(in srgb, var(--accent) 15%, var(--bg-muted)); }
.kc-card-body strong { display: block; margin-bottom: 4px; font-size: var(--fz-14); }
.kc-card-body p {
  margin: 0; font-size: var(--fz-12); color: var(--text-2); line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kc-read-more { display: inline-block; margin-top: 8px; font-size: var(--fz-12); color: var(--text-link); font-weight: 600; }
.kc-view-toggle button { font-size: var(--fz-12); }
.kc-release-note h3 { color: var(--text-1); }
.kc-release-note--highlight {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent);
}
.kc-walkthrough-steps .kc-step { display: flex; gap: var(--sp-3); padding: var(--sp-3) 0; border-bottom: 1px solid var(--border-subtle); }
.kc-step-num { width: 36px; height: 36px; border-radius: 50%; background: color-mix(in srgb, var(--accent) 15%, transparent);
               color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }
.diagram-viewport { border: 1px solid var(--border-subtle); border-radius: 10px; overflow: hidden; background: var(--bg-elev-1); }
.diagram-toolbar { display: flex; gap: 4px; padding: 6px 8px; background: var(--bg-2); border-bottom: 1px solid var(--border-subtle); align-items: center; flex-wrap: wrap; }
.diagram-toolbar button { background: transparent; border: 1px solid var(--border-subtle); border-radius: 4px; padding: 4px 10px; cursor: pointer; font-size: var(--fz-12); }
.diagram-toolbar button:hover { background: var(--bg-elev-1); }
.diagram-zoom-label { margin-left: auto; font-size: var(--fz-11); color: var(--text-3); font-variant-numeric: tabular-nums; min-width: 3em; text-align: right; }
.diagram-canvas-wrap {
  overflow: auto;
  min-height: 480px;
  max-height: min(70vh, 720px);
  cursor: grab;
  background: var(--bg-1);
  position: relative;
  -webkit-overflow-scrolling: touch;
}
.diagram-canvas-wrap.is-dragging { cursor: grabbing; user-select: none; }
.diagram-canvas {
  transform-origin: 0 0;
  padding: 0;
  display: block;
  min-width: min-content;
  min-height: min-content;
}
.diagram-canvas svg {
  max-width: none !important;
  max-height: none !important;
  shape-rendering: geometricPrecision;
  text-rendering: geometricPrecision;
}
.diagram-error { color: var(--color-danger); padding: var(--sp-3); }

/* PKI / SMTP certificate management */
.pki-diag-grid { display: flex; flex-direction: column; gap: 6px; }
.pki-diag-row { display: flex; justify-content: space-between; gap: var(--sp-3); font-size: var(--fz-13); padding: 6px 0; border-bottom: 1px solid var(--border-subtle); }
.pki-diag-row.ok span:last-child { color: var(--status-success-fg); }
.pki-diag-row.fail span:last-child { color: var(--status-danger-fg); }
.pki-status-valid { background: var(--pill-success-bg); color: var(--status-success-fg); }
.pki-status-expiring_soon { background: var(--pill-warning-bg); color: var(--status-warning-fg); }
.pki-status-expired, .pki-status-invalid { background: var(--pill-danger-bg); color: var(--status-danger-fg); }
.pki-health-healthy { background: var(--pill-success-bg); }
.pki-health-expiring_soon { background: var(--pill-warning-bg); }
.pki-health-expired { background: var(--pill-danger-bg); }
.pki-preview { display: grid; gap: var(--sp-2); font-size: var(--fz-13); }

/* Task card "assigned to / coordinator" strip — compact line between
   title and footer so the assignment is glanceable without opening
   the drawer. Two pills max, both truncate on narrow cards. */
.task-card .assign-strip { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-top: 6px;
                           font-size: var(--fz-11); color: var(--text-3); }
.task-card .assign-strip .who { display: inline-flex; align-items: center; gap: 4px; max-width: 100%;
                                overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task-card .assign-strip .who-l { opacity: .55; font-size: 10px; }

/* Task drawer — Assignment Details card. Single grid block under the
   header so admins (and students reading their own task) see the four
   things spelled out: Assignee · Coordinator · Internship · Dates. */
.drawer-assign { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 16px;
                 padding: 10px 12px; margin: var(--sp-2) 0;
                 background: var(--bg-2); border: 1px solid var(--border-subtle); border-radius: 8px;
                 font-size: var(--fz-12); }
.drawer-assign .lbl { color: var(--text-3); text-transform: uppercase; font-size: var(--fz-11); letter-spacing: .5px; }
.drawer-assign .val { color: var(--text-1); margin-top: 1px; }

/* Notification Center — preview / inline expand */
.notification-row .notification-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; margin-top: 6px;
}
.notification-body-preview {
  font-size: var(--fz-12);
  margin-top: 2px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: break-word;
}
.notification-body-full {
  font-size: var(--fz-12);
  margin-top: 2px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  padding: var(--sp-2) var(--sp-3);
  margin-top: var(--sp-2);
  background: var(--bg-2);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
}
.notification-row.is-expanded {
  background: color-mix(in srgb, var(--accent) 4%, var(--bg-elev-1)) !important;
}
.notification-row-actions .btn { white-space: nowrap; }