/* Breakpoints: compact desktop <=1180px | mobile <=720px */

.kt-shell {
  --kt-paper: #f3ecdc;
  --kt-paper-solid: #f8f2e6;
  --kt-ink: #25291f;
  --kt-bark: #4d4029;
  --kt-sage: #7f9b84;
  --kt-leaf: #52745c;
  --kt-coral: #d86d51;
  --kt-ochre: #bd8a2c;
  margin: 22px 0 24px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--border) 72%, #8c7550);
  border-radius: 16px;
  background: color-mix(in srgb, var(--bg-card) 76%, var(--kt-paper));
}

.kt-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  padding: 22px 24px 20px;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 78%, #9c8967);
}

.kt-title-block {
  min-width: 280px;
  max-width: 620px;
}

.kt-head h2 {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 580;
  letter-spacing: -.03em;
  line-height: 1;
  text-wrap: balance;
}

.kt-head p {
  max-width: 68ch;
  margin: 0;
  color: var(--text-secondary);
  font-size: .86rem;
  line-height: 1.5;
  text-wrap: pretty;
}

.kt-head-actions {
  display: flex;
  flex: 1 1 540px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 9px;
  max-width: 650px;
}

.kt-head-actions [hidden] { display: none !important; }

.kt-state-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: color-mix(in srgb, var(--bg-input) 74%, transparent);
}

.kt-state-switch button {
  min-height: 34px;
  padding: 7px 11px;
  border: 0;
  border-radius: 7px;
  color: var(--text-secondary);
  background: transparent;
  font: 700 .72rem var(--font-body);
  cursor: pointer;
  transition: color 160ms ease-out, background-color 160ms ease-out;
}

.kt-state-switch button:hover { color: var(--text-primary); }
.kt-state-switch button[aria-pressed="true"] {
  color: var(--text-primary);
  background: var(--bg-card);
  box-shadow: 0 1px 5px rgba(42, 33, 22, .13);
}

.kt-label-toggle {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  gap: 7px;
  padding: 0 9px;
  color: var(--text-secondary);
  font-size: .72rem;
  font-weight: 650;
  cursor: pointer;
}

.kt-label-toggle input {
  width: 15px;
  height: 15px;
  margin: 0;
  accent-color: var(--accent);
}

.kt-category-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: .66rem;
  font-weight: 750;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.kt-category-picker select {
  min-width: 178px;
  max-width: 250px;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 8px 30px 8px 10px;
  color: var(--text-primary);
  background: var(--bg-card);
  font: 650 .76rem var(--font-body);
  text-transform: none;
}

.kt-head-back {
  min-height: 40px;
  white-space: nowrap;
}

.kt-state-switch button:focus-visible,
.kt-label-toggle:has(input:focus-visible),
.kt-category-picker select:focus-visible,
.kt-canvas-back:focus-visible,
.kt-zoom button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 76%, white);
  outline-offset: 2px;
}

.kt-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 238px;
  min-height: 680px;
}

.kt-canvas {
  position: relative;
  min-width: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  background:
    radial-gradient(circle at 50% 22%, rgba(255, 255, 255, .7), transparent 43%),
    linear-gradient(180deg, color-mix(in srgb, var(--kt-paper) 92%, white) 0%, var(--kt-paper) 63%, color-mix(in srgb, var(--kt-paper) 88%, #b9965c) 100%);
}

.kt-canvas::after {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 58%, rgba(91, 72, 40, .055) 100%);
  content: '';
  pointer-events: none;
}

.kt-canvas.is-panning { cursor: grabbing; }
.kt-canvas svg {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 680px;
  user-select: none;
}

.kt-world {
  transform-origin: var(--kt-origin-x, 50%) var(--kt-origin-y, 50%);
  transition: transform 360ms cubic-bezier(.22, .72, .22, 1), opacity 160ms ease-out;
}

.kt-canvas svg.is-zooming .kt-world {
  transform: scale(1.55);
  opacity: .12;
}

.kt-artwork,
.kt-art,
.kt-roots-art,
.kt-soil-line { pointer-events: none; }
.kt-art { opacity: .96; }
.kt-roots-art {
  opacity: .86;
  filter: sepia(.3) saturate(.68) brightness(.78) contrast(1.16);
}
.kt-soil-line {
  fill: none;
  stroke: color-mix(in srgb, var(--kt-ochre) 58%, var(--kt-bark));
  stroke-width: 1.5;
  stroke-linecap: round;
  opacity: .28;
  vector-effect: non-scaling-stroke;
}

.kt-edge {
  fill: none;
  stroke: var(--kt-bark);
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: .9;
}

.kt-edge--d1 { stroke-width: 30; }
.kt-edge--d2 { stroke-width: 16; }
.kt-edge--d3 { stroke-width: 8; }
.kt-edge--d4 { stroke-width: 5; }
.kt-edge--d5 { stroke-width: 3.6; }
.kt-canvas svg[data-mode="overview"] .kt-edge { opacity: .065; }

.kt-route {
  fill: none;
  stroke: transparent;
  stroke-width: 5;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.kt-route.is-route {
  stroke: var(--kt-coral);
  filter: drop-shadow(0 1px 1px rgba(115, 45, 30, .22));
}

.kt-canvas svg.is-entering .kt-route.is-route {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: kt-route-draw 360ms cubic-bezier(.22, .72, .22, 1) 420ms forwards;
}

.kt-node {
  color: var(--kt-sage);
  outline: none;
  cursor: pointer;
}

.kt-node-halo {
  fill: color-mix(in srgb, var(--kt-paper) 90%, transparent);
  stroke: rgba(83, 66, 37, .3);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.kt-node-core {
  fill: var(--kt-sage);
  stroke: #f4ead4;
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}

.kt-node-ring {
  fill: none;
  stroke: #a67f38;
  stroke-width: 2.2;
  vector-effect: non-scaling-stroke;
  transition: stroke 140ms ease-out, stroke-width 140ms ease-out;
}

.kt-node:hover .kt-node-ring,
.kt-node:focus-visible .kt-node-ring,
.kt-node.is-selected .kt-node-ring {
  stroke: #46557b;
  stroke-width: 4;
}

.kt-node.is-recommended .kt-node-halo {
  fill: color-mix(in srgb, var(--kt-coral) 18%, var(--kt-paper));
  stroke: var(--kt-coral);
  stroke-width: 1.6;
}

.kt-context-label {
  opacity: 0;
  pointer-events: none;
  transform: translateY(2px);
  transition: opacity 130ms ease-out, transform 130ms ease-out;
}

.kt-context-label rect,
.kt-map-label rect {
  fill: color-mix(in srgb, var(--kt-paper-solid) 96%, transparent);
  stroke: color-mix(in srgb, var(--kt-bark) 22%, transparent);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.kt-context-label text {
  fill: var(--kt-ink);
  font: 700 16px var(--font-body);
  letter-spacing: -.01em;
}

.kt-node:hover .kt-context-label,
.kt-node:focus-visible .kt-context-label,
.kt-node.is-selected .kt-context-label,
.kt-node.is-recommended .kt-context-label,
.kt-canvas svg[data-mode="focus"][data-labels="all"] .kt-node--topic .kt-context-label {
  opacity: 1;
  transform: translateY(0);
}

.kt-canvas svg[data-mode="overview"][data-labels="all"] .kt-node .kt-context-label {
  opacity: 0;
}

.kt-overview-labels {
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease-out;
}

.kt-canvas svg[data-mode="overview"][data-labels="all"] .kt-overview-labels { opacity: 1; }
.kt-map-label text {
  fill: var(--kt-ink);
  font: 720 16px var(--font-body);
  letter-spacing: -.015em;
}

.kt-label-leader {
  fill: none;
  stroke: color-mix(in srgb, var(--kt-bark) 56%, transparent);
  stroke-width: 1;
  stroke-linecap: round;
  stroke-dasharray: 3 4;
  vector-effect: non-scaling-stroke;
}

.kt-sprig { color: var(--kt-leaf); pointer-events: none; }
.kt-sprig > path {
  fill: none;
  stroke: var(--kt-bark);
  stroke-width: 2.4;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.kt-leaf {
  fill: color-mix(in srgb, var(--kt-leaf) var(--kt-mastery, 45%), #a7ad8e);
  stroke: #3d5d48;
  stroke-width: .8;
  vector-effect: non-scaling-stroke;
}

.kt-vein {
  fill: none;
  stroke: color-mix(in srgb, #e9e2c8 68%, var(--kt-leaf));
  stroke-width: .6;
  vector-effect: non-scaling-stroke;
}

.kt-sprig--untested .kt-leaf { fill: #b7b5a0; stroke: #777563; opacity: .78; }
.kt-sprig--weak .kt-leaf { fill: #91a187; }
.kt-sprig--strong .kt-leaf,
.kt-sprig--mastered .kt-leaf { fill: #416d50; }
.kt-bud-stem { fill: none; stroke: #6e5525; stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.kt-bud { fill: var(--kt-ochre); stroke: #805d1e; stroke-width: 1; vector-effect: non-scaling-stroke; }

.kt-canvas svg.is-entering .kt-node--topic {
  opacity: 0;
  animation: kt-topic-enter 190ms cubic-bezier(.22, .72, .22, 1) 120ms forwards;
}

.kt-inspector {
  padding: 24px 19px;
  border-left: 1px solid color-mix(in srgb, var(--border) 78%, #9c8967);
  background: color-mix(in srgb, var(--bg-card) 84%, var(--kt-paper));
}

.kt-inspector-kicker {
  color: var(--text-muted);
  font-size: .63rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.kt-inspector h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: 1.45rem;
  line-height: 1.08;
  letter-spacing: -.025em;
  text-wrap: balance;
}

.kt-inspector > p {
  margin: 0 0 18px;
  color: var(--text-secondary);
  font-size: .8rem;
  line-height: 1.55;
}

.kt-inspector .sr2-btn {
  width: 100%;
  margin-top: 9px;
}

.kt-preview-notice {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: -4px 0 18px;
  padding: 10px 11px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: 9px;
  color: color-mix(in srgb, var(--accent) 72%, var(--text-primary));
  background: color-mix(in srgb, var(--accent-dim) 72%, var(--bg-card));
  font-size: .7rem;
  line-height: 1.4;
}

.kt-preview-notice strong { color: var(--text-primary); font-size: .74rem; }
.kt-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  margin: 0 0 18px;
}

.kt-stats div {
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-card) 88%, transparent);
}

.kt-stats dt {
  color: var(--text-muted);
  font-size: .55rem;
  font-weight: 750;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.kt-stats dd {
  margin: 4px 0 0;
  color: var(--text-primary);
  font: 680 .87rem var(--font-body);
  text-transform: capitalize;
}

.kt-legend {
  margin: 0 0 14px;
  padding-top: 2px;
}

.kt-legend h4 {
  margin: 0 0 10px;
  color: var(--text-primary);
  font: 760 .7rem var(--font-body);
}

.kt-legend p {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 0 0 9px;
  color: var(--text-secondary);
  font-size: .7rem;
  line-height: 1.4;
}

.kt-legend strong { color: var(--text-primary); font-weight: 720; }
.kt-legend-mark {
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  margin-top: 2px;
}

.kt-legend-mark--leaf {
  border: 1px solid #426049;
  border-radius: 70% 30% 70% 30%;
  background: #8aa28a;
  transform: rotate(-18deg);
}

.kt-legend-mark--mastery { border-radius: 50%; background: #416d50; }
.kt-legend-mark--recall { border: 2px solid #805d1e; border-radius: 50%; background: var(--kt-ochre); }

.kt-canvas-back {
  position: absolute;
  z-index: 2;
  top: 14px;
  left: 14px;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid rgba(59, 50, 35, .28);
  border-radius: 9px;
  color: #31362c;
  background: rgba(248, 243, 232, .94);
  font: 720 .72rem var(--font-body);
  cursor: pointer;
}

.kt-canvas-back[hidden] { display: none; }
.kt-canvas-back:hover { background: #fffaf0; }
.kt-canvas-back span { margin-right: 5px; font-size: 1rem; }

.kt-zoom {
  position: absolute;
  z-index: 2;
  right: 14px;
  bottom: 14px;
  display: flex;
  overflow: hidden;
  border: 1px solid rgba(59, 50, 35, .28);
  border-radius: 10px;
  background: rgba(248, 243, 232, .93);
  box-shadow: 0 2px 7px rgba(52, 42, 28, .14);
  backdrop-filter: blur(8px);
}

.kt-zoom button {
  min-width: 38px;
  height: 38px;
  border: 0;
  border-right: 1px solid rgba(59, 50, 35, .15);
  color: #33372e;
  background: transparent;
  font: 720 .69rem var(--font-body);
  cursor: pointer;
}

.kt-zoom button:nth-child(2),
.kt-zoom button:nth-child(3) { min-width: 62px; }
.kt-zoom button:last-child { border-right: 0; }
.kt-zoom button:hover { background: rgba(77, 99, 78, .12); }

.kt-gesture-hint {
  position: absolute;
  z-index: 2;
  left: 14px;
  bottom: 14px;
  margin: 0;
  padding: 7px 9px;
  border: 1px solid rgba(59, 50, 35, .2);
  border-radius: 7px;
  color: #595548;
  background: rgba(248, 243, 232, .88);
  font: 580 .63rem var(--font-body);
  pointer-events: none;
}

html[data-theme="dark"] .kt-shell,
html[data-theme="glass"] .kt-shell {
  --kt-ink: #ece8dc;
  --kt-paper: #242720;
  --kt-paper-solid: #2d3028;
  --kt-bark: #a99368;
}

html[data-theme="dark"] .kt-art,
html[data-theme="glass"] .kt-art {
  opacity: .96;
  filter: none;
}

html[data-theme="dark"] .kt-roots-art,
html[data-theme="glass"] .kt-roots-art {
  opacity: .86;
  filter: sepia(.3) saturate(.68) brightness(.78) contrast(1.16);
}

html[data-theme="dark"] .kt-canvas,
html[data-theme="glass"] .kt-canvas {
  background:
    radial-gradient(circle at 50% 22%, rgba(255, 255, 255, .68), transparent 43%),
    linear-gradient(180deg, #f5eedf 0%, #eee5d4 68%, #e8dcc8 100%);
}

html[data-theme="dark"] .kt-canvas svg,
html[data-theme="glass"] .kt-canvas svg {
  --kt-ink: #25291f;
  --kt-paper: #f3ecdc;
  --kt-paper-solid: #f8f2e6;
  --kt-bark: #4d4029;
}

html[data-theme="dark"] .kt-canvas-back,
html[data-theme="glass"] .kt-canvas-back,
html[data-theme="dark"] .kt-zoom,
html[data-theme="glass"] .kt-zoom,
html[data-theme="dark"] .kt-gesture-hint,
html[data-theme="glass"] .kt-gesture-hint {
  border-color: rgba(238, 229, 208, .2);
  color: #eee8da;
  background: rgba(31, 35, 30, .92);
}

@keyframes kt-route-draw { to { stroke-dashoffset: 0; } }
@keyframes kt-topic-enter { to { opacity: 1; } }

@media (max-width: 1180px) {
  .kt-head { flex-direction: column; }
  .kt-title-block { max-width: 760px; }
  .kt-head-actions { flex: 0 1 auto; justify-content: flex-start; max-width: none; }
  .kt-frame { grid-template-columns: 1fr; }
  .kt-inspector {
    border-top: 1px solid var(--border);
    border-left: 0;
  }
  .kt-inspector .kt-legend { max-width: 680px; }
  .kt-canvas svg { min-height: 620px; }
}

@media (max-width: 720px) {
  .kt-shell { margin-inline: -4px; border-radius: 14px; }
  .kt-head { gap: 18px; padding: 18px; }
  .kt-head h2 { font-size: 1.85rem; }
  .kt-head-actions { align-items: stretch; flex-direction: column; }
  .kt-state-switch { align-self: flex-start; }
  .kt-label-toggle { padding-inline: 2px; }
  .kt-category-picker { align-items: stretch; flex-direction: column; }
  .kt-category-picker select { width: 100%; max-width: none; }
  .kt-head-back { width: 100%; }
  .kt-canvas svg { min-height: 480px; }
  .kt-gesture-hint { display: none; }
  .kt-zoom { right: 8px; bottom: 8px; }
  .kt-zoom button:nth-child(2) { display: none; }
  .kt-inspector { padding: 20px 18px; }
}

@media (pointer: coarse) {
  .kt-state-switch button,
  .kt-label-toggle,
  .kt-category-picker select,
  .kt-head-back,
  .kt-canvas-back,
  .kt-zoom button { min-height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  .kt-world,
  .kt-context-label,
  .kt-overview-labels { transition-duration: 1ms; }
  .kt-canvas svg.is-zooming .kt-world { transform: none; }
  .kt-canvas svg.is-entering .kt-node--topic,
  .kt-canvas svg.is-entering .kt-route.is-route {
    animation: none;
    opacity: 1;
    stroke-dashoffset: 0;
  }
}