/*
 * app-theme.css — shared theme for the learning-paths prototypes.
 *
 * Tokens mirror packages/ui/src/index.css (shadcn-svelte) exactly:
 * OKLCH palette, Geist, --radius: 0.625rem, shadow-2xs, and the component
 * recipes from @cio/ui base components (Button, Badge, Item, Progress, Sidebar).
 * Dark mode uses the same `.dark` class convention as the app.
 */

:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.145 0 0);
  --primary: oklch(0.488 0.243 264.376);
  --primary-foreground: oklch(0.97 0.014 254.604);
  --secondary: oklch(0.967 0.001 286.375);
  --secondary-foreground: oklch(0.21 0.006 285.885);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);
  --destructive: oklch(0.577 0.245 27.325);
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
  --radius: 0.625rem;
  --sidebar: oklch(0.985 0 0);
  --sidebar-foreground: oklch(0.145 0 0);
  --sidebar-accent: oklch(0.97 0 0);
  --sidebar-accent-foreground: oklch(0.205 0 0);
  --sidebar-border: oklch(0.922 0 0);

  /* Semantic states from @cio/ui Badge variants (emerald / amber) */
  --success: oklch(0.596 0.145 163.225); /* emerald-600 */
  --success-foreground: #fff;
  --success-soft: oklch(0.596 0.145 163.225 / 0.12);
  --warning: oklch(0.666 0.179 58.318); /* amber-600 */
  --warning-foreground: #fff;
  --warning-soft: oklch(0.666 0.179 58.318 / 0.14);

  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);

  --shadow-2xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

.dark {
  --background: oklch(0.145 0 0);
  --foreground: oklch(0.985 0 0);
  --card: oklch(0.205 0 0);
  --card-foreground: oklch(0.985 0 0);
  --popover: oklch(0.205 0 0);
  --popover-foreground: oklch(0.985 0 0);
  --primary: oklch(0.424 0.199 265.638);
  --primary-foreground: oklch(0.97 0.014 254.604);
  --secondary: oklch(0.274 0.006 286.033);
  --secondary-foreground: oklch(0.985 0 0);
  --muted: oklch(0.269 0 0);
  --muted-foreground: oklch(0.708 0 0);
  --accent: oklch(0.269 0 0);
  --accent-foreground: oklch(0.985 0 0);
  --destructive: oklch(0.704 0.191 22.216);
  --border: oklch(1 0 0 / 10%);
  --input: oklch(1 0 0 / 15%);
  --ring: oklch(0.556 0 0);
  --sidebar: oklch(0.205 0 0);
  --sidebar-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.269 0 0);
  --sidebar-accent-foreground: oklch(0.985 0 0);
  --sidebar-border: oklch(1 0 0 / 10%);

  --success: oklch(0.696 0.17 162.48); /* emerald-500 */
  --success-foreground: oklch(0.262 0.051 172.552); /* emerald-950 */
  --success-soft: oklch(0.696 0.17 162.48 / 0.16);
  --warning: oklch(0.769 0.188 70.08); /* amber-500 */
  --warning-foreground: oklch(0.279 0.077 45.635); /* amber-950 */
  --warning-soft: oklch(0.769 0.188 70.08 / 0.16);
}

/* ============ base ============ */
* {
  box-sizing: border-box;
  border-color: var(--border);
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  font-family:
    'Geist',
    ui-sans-serif,
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  background: var(--background);
  color: var(--foreground);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
}
.tnum {
  font-variant-numeric: tabular-nums;
}
.text-muted {
  color: var(--muted-foreground);
}
.text-primary {
  color: var(--primary);
}

/* ============ app shell ============ */
.app {
  display: grid;
  grid-template-columns: 256px 1fr;
  min-height: 100vh;
}
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.content {
  padding: 28px 28px 64px;
}
.wrap {
  max-width: 960px;
  margin: 0 auto;
}
.wrap-narrow {
  max-width: 760px;
  margin: 0 auto;
}

/* sidebar (mirrors @cio/ui base/sidebar) */
.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--sidebar-border);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px 14px;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: var(--primary-foreground);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
}
.brand-name {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
}
.nav-label {
  font-size: 11px;
  color: var(--muted-foreground);
  font-weight: 500;
  padding: 12px 8px 4px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-md);
  color: var(--sidebar-foreground);
  font-weight: 400;
  font-size: 14px;
  transition: background 0.1s;
}
.nav-item svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
  color: var(--muted-foreground);
  flex-shrink: 0;
}
.nav-item:hover {
  background: var(--sidebar-accent);
}
.nav-item.active {
  background: var(--sidebar-accent);
  color: var(--sidebar-accent-foreground);
  font-weight: 500;
}
.nav-item.active svg {
  color: var(--sidebar-accent-foreground);
}
.nav-tail {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted-foreground);
}
.nav-badge {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  background: var(--primary);
  color: var(--primary-foreground);
  border-radius: 999px;
  padding: 1px 7px;
}
.sidebar-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-top: 1px solid var(--sidebar-border);
}
.avatar {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  background: var(--secondary);
  color: var(--secondary-foreground);
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 12px;
  flex-shrink: 0;
}
.who {
  min-width: 0;
}
.who .nm {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.who .rl {
  font-size: 11.5px;
  color: var(--muted-foreground);
}

/* path identity block (teacher path sidebar) */
.back-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted-foreground);
  padding: 6px 8px;
  border-radius: var(--radius-md);
  margin-bottom: 4px;
}
.back-link:hover {
  background: var(--sidebar-accent);
  color: var(--foreground);
}
.back-link svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
}
.path-id {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 8px 14px;
  border-bottom: 1px solid var(--sidebar-border);
  margin-bottom: 6px;
}
.path-id .ico {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: var(--primary-foreground);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.path-id .ico svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}
.path-id .nm {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.path-id .st {
  font-size: 11.5px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}
.path-id .st .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
}
.st-active {
  color: var(--success);
}
.st-active .dot {
  background: var(--success);
}
.st-draft {
  color: var(--warning);
}
.st-draft .dot {
  background: var(--warning);
}

/* topbar */
.topbar {
  height: 56px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--background) 90%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
}
.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--muted-foreground);
  min-width: 0;
}
.crumbs a:hover {
  color: var(--foreground);
}
.crumbs .sep {
  color: var(--border);
}
.crumbs .here {
  color: var(--foreground);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.top-title {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ============ buttons (mirrors @cio/ui base/button) ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  height: 36px;
  padding: 0 16px;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background 0.12s,
    border-color 0.12s,
    color 0.12s;
  box-shadow: var(--shadow-2xs);
  user-select: none;
}
.btn svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
  flex-shrink: 0;
}
.btn-primary {
  background: var(--primary);
  color: var(--primary-foreground);
}
.btn-primary:hover {
  background: color-mix(in oklab, var(--primary) 90%, transparent);
}
.btn-outline {
  background: var(--background);
  border-color: var(--input);
  color: var(--foreground);
}
.btn-outline:hover {
  background: var(--accent);
  color: var(--accent-foreground);
}
.btn-secondary {
  background: var(--secondary);
  color: var(--secondary-foreground);
}
.btn-secondary:hover {
  background: color-mix(in oklab, var(--secondary) 80%, transparent);
}
.btn-ghost {
  background: transparent;
  box-shadow: none;
  color: var(--foreground);
}
.btn-ghost:hover {
  background: var(--accent);
}
.btn-destructive {
  background: var(--destructive);
  color: #fff;
}
.btn-success {
  background: var(--success);
  color: var(--success-foreground);
}
.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
  gap: 6px;
}
.btn-sm svg {
  width: 15px;
  height: 15px;
}
.btn-lg {
  height: 40px;
  padding: 0 24px;
}
.btn[disabled],
.btn.disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}
.btn-icon {
  width: 36px;
  padding: 0;
}
.btn-icon.btn-sm {
  width: 32px;
}

/* ============ badges (mirrors @cio/ui base/badge) ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  width: fit-content;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}
.badge svg {
  width: 12px;
  height: 12px;
  stroke-width: 2.4;
}
.badge-default {
  background: var(--primary);
  color: var(--primary-foreground);
}
.badge-secondary {
  background: var(--secondary);
  color: var(--secondary-foreground);
}
.badge-success {
  background: var(--success);
  color: var(--success-foreground);
}
.badge-warning {
  background: var(--warning);
  color: var(--warning-foreground);
}
.badge-outline {
  border-color: var(--border);
  color: var(--foreground);
  background: transparent;
}
.badge-success-soft {
  background: var(--success-soft);
  color: var(--success);
}
.badge-primary-soft {
  background: color-mix(in oklab, var(--primary) 12%, transparent);
  color: var(--primary);
}
.badge-muted {
  background: var(--muted);
  color: var(--muted-foreground);
}

/* ============ cards ============ */
.card {
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xs);
}
.card-pad {
  padding: 20px;
}

/* ============ item rows (mirrors @cio/ui base/item) ============ */
.item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  padding: 16px;
  font-size: 14px;
  transition:
    background 0.1s,
    border-color 0.1s;
}
.item-muted {
  background: color-mix(in oklab, var(--muted) 50%, transparent);
}
.item-outline {
  border-color: var(--border);
}
.item-done {
  opacity: 0.6;
}
.item-done .item-title,
.item-done .item-desc {
  color: var(--muted-foreground);
  text-decoration: line-through;
}
.item-current {
  background: var(--card);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.item-dashed {
  border: 1px dashed var(--border);
  background: transparent;
}
a.item:hover {
  background: color-mix(in oklab, var(--accent) 50%, transparent);
}

.item-media-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--muted);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 2px;
  color: var(--muted-foreground);
}
.item-media-icon svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}
.item-media-icon.is-done {
  background: var(--success);
  border-color: var(--success);
  color: var(--success-foreground);
}
.item-media-icon.is-current {
  background: color-mix(in oklab, var(--primary) 10%, transparent);
  border-color: color-mix(in oklab, var(--primary) 30%, transparent);
  color: var(--primary);
}
.item-media-lg {
  width: 40px;
  height: 40px;
}
.item-media-lg svg {
  width: 19px;
  height: 19px;
}
.item-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.item-title {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.item-title-lg {
  font-size: 15px;
  font-weight: 600;
}
.item-desc {
  font-size: 13px;
  color: var(--muted-foreground);
  line-height: 1.45;
}
.item-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.item-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

/* ============ progress (mirrors @cio/ui base/progress) ============ */
.progress {
  height: 8px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: color-mix(in oklab, var(--primary) 20%, transparent);
  flex: 1;
}
.progress > span {
  display: block;
  height: 100%;
  background: var(--primary);
  border-radius: var(--radius-md);
  transition: width 0.3s;
}
.progress-success > span {
  background: var(--success);
}
.progress-thin {
  height: 6px;
}

/* progress ring (mirrors @cio/ui custom/percent-ring-progress) */
.ring {
  position: relative;
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}
.ring-sm {
  width: 40px;
  height: 40px;
}
.ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  display: block;
}
.ring .track {
  stroke: var(--border);
}
.ring .arc {
  stroke: var(--success);
  transition: stroke-dashoffset 0.7s ease-out;
}
.ring .lbl {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--foreground);
}
.ring-sm .lbl {
  font-size: 10px;
}

/* completion dots (setup page pattern) */
.dots {
  display: flex;
  gap: 4px;
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--border);
}
.dot.on {
  background: var(--success);
}

/* ============ forms ============ */
.input,
.textarea,
.select {
  width: 100%;
  font: inherit;
  font-size: 14px;
  color: var(--foreground);
  background: transparent;
  border: 1px solid var(--input);
  border-radius: var(--radius-md);
  padding: 7px 12px;
  outline: none;
  box-shadow: var(--shadow-2xs);
  transition:
    border-color 0.12s,
    box-shadow 0.12s;
}
.input:focus,
.textarea:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring) 50%, transparent);
}
.textarea {
  resize: vertical;
  min-height: 76px;
  line-height: 1.55;
}
.label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 6px;
}
.hint {
  font-size: 12px;
  color: var(--muted-foreground);
  margin-top: 5px;
}
.field {
  margin-bottom: 18px;
}
.field:last-child {
  margin-bottom: 0;
}

/* switch */
.switch {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
  cursor: pointer;
  display: inline-block;
}
.switch input {
  position: absolute;
  opacity: 0;
  inset: 0;
  margin: 0;
  cursor: pointer;
  z-index: 1;
}
.switch .track {
  position: absolute;
  inset: 0;
  background: var(--input);
  border-radius: 999px;
  transition: background 0.15s;
}
.switch .knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: var(--background);
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s;
}
.switch input:checked + .track {
  background: var(--primary);
}
.switch input:checked ~ .knob {
  transform: translateX(16px);
}

/* ============ tables ============ */
.thead,
.trow {
  display: grid;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
}
.thead {
  font-size: 12px;
  color: var(--muted-foreground);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}
.trow {
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.trow:last-child {
  border-bottom: none;
}
a.trow:hover {
  background: color-mix(in oklab, var(--accent) 50%, transparent);
}

/* ============ misc components ============ */
.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--input);
  background: var(--background);
  display: grid;
  place-items: center;
  color: var(--muted-foreground);
  cursor: pointer;
  box-shadow: var(--shadow-2xs);
}
.icon-btn:hover {
  color: var(--foreground);
  background: var(--accent);
}
.icon-btn svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
}

.seg-toggle {
  display: inline-flex;
  padding: 3px;
  background: var(--muted);
  border-radius: var(--radius-lg);
  gap: 2px;
}
.seg-toggle a,
.seg-toggle button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted-foreground);
  cursor: pointer;
}
.seg-toggle .on {
  background: var(--background);
  color: var(--foreground);
  box-shadow: var(--shadow-2xs);
}
.seg-toggle svg {
  width: 14px;
  height: 14px;
  stroke-width: 2;
}

.stat-card {
  padding: 16px 18px;
}
.stat-card .k {
  font-size: 13px;
  color: var(--muted-foreground);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 7px;
}
.stat-card .k svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
}
.stat-card .v {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 4px;
}
.stat-card .s {
  font-size: 12px;
  color: var(--muted-foreground);
  margin-top: 2px;
}

/* page headers */
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin: 8px 0 20px;
}
.page-title {
  font-size: 24px;
  font-weight: 400;
  letter-spacing: -0.025em;
  margin: 0 0 4px;
}
.page-sub {
  color: var(--muted-foreground);
  font-size: 14px;
  margin: 0;
}
.sec-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}
.sec-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 28px 0 14px;
}
.sec-head .count {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted-foreground);
  background: var(--muted);
  padding: 1px 8px;
  border-radius: 999px;
}
.sec-head .more {
  margin-left: auto;
  font-size: 13.5px;
  color: var(--primary);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
}
.sec-head .more svg {
  width: 14px;
  height: 14px;
  stroke-width: 2;
}

/* segmented path progress (course-count segments) */
.segs {
  display: flex;
  gap: 4px;
  flex: 1;
}
.seg {
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--primary) 15%, transparent);
  position: relative;
  overflow: hidden;
}
.seg.done {
  background: var(--success);
}
.seg.half::after {
  content: '';
  position: absolute;
  inset: 0;
  width: 45%;
  background: var(--primary);
  border-radius: 999px;
}

/* lock veil for thumbnails */
.lock-veil {
  position: absolute;
  inset: 0;
  background: oklch(0.145 0 0 / 0.35);
  display: grid;
  place-items: center;
}
.lock-veil svg {
  width: 18px;
  height: 18px;
  color: #fff;
  stroke-width: 2.2;
}

/* ============ journey spine (learner path detail) ============ */
.journey {
  position: relative;
  margin-top: 16px;
}
.step {
  position: relative;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  padding-bottom: 16px;
}
.step:last-child {
  padding-bottom: 0;
}
.rail {
  position: relative;
  display: flex;
  justify-content: center;
}
.rail::before {
  content: '';
  position: absolute;
  top: 38px;
  bottom: -16px;
  width: 2px;
  background: var(--border);
  border-radius: 2px;
}
.step:last-child .rail::before,
.step.no-rail .rail::before {
  display: none;
}
.step.s-done .rail::before {
  background: var(--success);
}
.step.s-current .rail::before {
  background: linear-gradient(180deg, var(--success) 0%, var(--border) 70%);
}
.node {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  z-index: 1;
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 13px;
  background: var(--muted);
  color: var(--muted-foreground);
  border: 1px solid var(--border);
}
.node svg {
  width: 17px;
  height: 17px;
  stroke-width: 2.4;
}
.step.s-done .node {
  background: var(--success);
  border-color: var(--success);
  color: var(--success-foreground);
}
.step.s-current .node {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-foreground);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--primary) 15%, transparent);
}

/* horizontal stepper (in-course ribbon) */
.stepper {
  display: flex;
  align-items: center;
}
.snode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  width: 110px;
  text-align: center;
}
.sdot {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 12px;
  background: var(--muted);
  color: var(--muted-foreground);
  border: 1px solid var(--border);
}
.sdot svg {
  width: 14px;
  height: 14px;
  stroke-width: 2.6;
}
.snode.done .sdot {
  background: var(--success);
  border-color: var(--success);
  color: var(--success-foreground);
}
.snode.current .sdot {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-foreground);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 15%, transparent);
}
.slabel {
  font-size: 11px;
  font-weight: 500;
  color: var(--muted-foreground);
  line-height: 1.25;
}
.snode.current .slabel {
  color: var(--foreground);
  font-weight: 600;
}
.sbar {
  flex: 1;
  height: 2px;
  background: var(--border);
  min-width: 12px;
  margin: 0 -14px 18px;
}
.sbar.filled {
  background: var(--success);
}

/* ============ responsive ============ */
@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
  .item {
    flex-wrap: wrap;
  }
  .item-actions {
    width: 100%;
  }
  .item-actions .btn {
    flex: 1;
  }
}