:root {
  color-scheme: dark;
  --bg: #07090d;
  --bg-2: #10131a;
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(185, 242, 59, 0.52);
  --ink: #f4f7ee;
  --muted: rgba(244, 247, 238, 0.58);
  --accent: #b9f23b;
  --accent-2: #78d7ff;
  --danger: #ef4b4b;
  --panel: rgba(12, 15, 21, 0.86);
  --panel-2: rgba(255, 255, 255, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 52% 44%, rgba(185, 242, 59, 0.12), transparent 30%),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 3.4rem 3.4rem, 3.4rem 3.4rem;
  color: var(--ink);
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  letter-spacing: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(0,0,0,.45), transparent 24%, transparent 76%, rgba(0,0,0,.42)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.028) 0 1px, transparent 1px 7px);
  pointer-events: none;
}

button,
input,
select {
  font: inherit;
}

input,
select {
  width: 100%;
  height: 2.25rem;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0 0.62rem;
  background: rgba(255, 255, 255, 0.07);
  color: var(--ink);
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(185, 242, 59, 0.12);
}

select option {
  color: #111;
}

.app-shell {
  position: relative;
  z-index: 1;
  height: 100vh;
  overflow: hidden;
}

.layout {
  position: absolute;
  inset: 0;
  min-height: 0;
  display: block;
}

.left-column,
.center-column,
.inspector,
.center-toolbar,
footer,
.canvas-toolbar,
.canvas-panel {
  transition: inset .46s cubic-bezier(.22, 1, .36, 1), opacity .3s ease, transform .46s cubic-bezier(.22, 1, .36, 1), visibility .3s ease;
}

.left-column,
.center-column {
  position: absolute;
  min-height: 0;
  display: grid;
  gap: 0.72rem;
}

.left-column {
  left: 0.72rem;
  top: 0.72rem;
  bottom: 0.72rem;
  width: min(20rem, 22vw);
  grid-template-rows: auto minmax(0, 1fr);
  z-index: 6;
  pointer-events: auto;
}

.center-column {
  inset: 0;
  grid-template-rows: minmax(0, 1fr);
  pointer-events: none;
}

.panel,
.canvas-panel,
.center-toolbar {
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}

.center-toolbar {
  position: fixed;
  left: calc(min(20rem, 22vw) + 1.44rem);
  right: calc(min(23rem, 24vw) + 1.44rem);
  top: 0.72rem;
  z-index: 6;
}

.no-pad,
.canvas-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.inspector {
  position: absolute;
  right: 0.72rem;
  top: 0.72rem;
  bottom: 0.72rem;
  width: min(23rem, 24vw);
  z-index: 5;
}

.panel-head {
  min-height: 2.5rem;
  padding: 0.72rem 0.86rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(185,242,59,.08), transparent);
}

.panel h2 {
  margin: 0;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 950;
  text-transform: uppercase;
}

.panel-body {
  min-height: 0;
  overflow: hidden;
  padding: 0.72rem;
}

.hint {
  margin: 0.5rem 0;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
}

.preset-panel .panel-body,
.resource-toolbar,
.inspector-form {
  display: grid;
  gap: 0.55rem;
}

.preset-select-row,
.canvas-toolbar label,
.topbar-actions label,
.inspector-form label,
.preset-panel label {
  display: grid;
  gap: 0.26rem;
  min-width: 0;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
}

.preset-actions,
.topbar-actions,
.canvas-toolbar,
.tag-actions,
.resource-upload,
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
  align-items: end;
}

.topbar-actions {
  padding: 0.62rem;
}

.topbar-actions label {
  flex: 1 1 8.5rem;
}

.topbar-actions label:first-child {
  flex-basis: 12rem;
}

.resource-toolbar {
  align-items: stretch;
}

.tag-panel {
  border: 1px solid var(--line);
  padding: 0.62rem;
  background: var(--panel-2);
}

.tag-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.48rem;
}

.tag-header-row strong {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 950;
}

.tag-actions button {
  min-height: 1.7rem;
  padding: 0 0.48rem;
  font-size: 0.68rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.34rem;
  max-height: 5.8rem;
  overflow: auto;
  align-content: flex-start;
}

.tag-item,
.tab-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 1.8rem;
  padding: 0 0.54rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 900;
}

.tag-item.active,
.tab-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(185, 242, 59, 0.1);
}

.resource-upload input {
  flex: 1 1 7.5rem;
}

.resource-upload button {
  min-height: 2.15rem;
  padding: 0 0.55rem;
  font-size: 0.72rem;
}

.resources .panel-body {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.resource-list {
  flex: 1;
  min-height: 0;
  display: grid;
  gap: 0.52rem;
  overflow: auto;
  padding-right: 0.18rem;
  padding-bottom: 0.6rem;
}

.resource-item {
  position: relative;
  min-height: 5.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.05);
  cursor: grab;
}

.resource-thumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.05);
}

.resource-item.resource-thumb-fallback {
  background:
    linear-gradient(135deg, rgba(185,242,59,.16), rgba(120,215,255,.1)),
    repeating-linear-gradient(45deg, rgba(255,255,255,.06) 0 1px, transparent 1px 9px);
}

.resource-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, .82), rgba(0, 0, 0, .12));
}

.resource-meta {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.12rem;
  padding: 0.56rem;
  color: #fff;
}

.resource-meta strong,
.resource-meta span {
  display: block;
  text-shadow: 0 1px 2px rgba(0,0,0,.55);
}

.resource-meta strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.8rem;
}

.resource-meta span {
  font-size: 0.68rem;
  color: rgba(255,255,255,.7);
}

.resource-source {
  width: fit-content;
  margin-top: 0.18rem;
  padding: 0.08rem 0.42rem;
  border: 1px solid rgba(255,255,255,.32);
  color: var(--accent);
  background: rgba(0,0,0,.22);
}

.canvas-toolbar {
  position: fixed;
  left: calc(min(20rem, 22vw) + 1.44rem);
  right: calc(min(23rem, 24vw) + 1.44rem);
  top: 8.8rem;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: .42rem;
  padding: 0.62rem;
  border: 1px solid var(--line);
  background: rgba(12, 15, 21, .9);
  pointer-events: auto;
}

.canvas-toolbar label {
  flex: 0 0 5.6rem;
}

.canvas-toolbar input[type="number"] {
  width: 100%;
}

.stage-wrap {
  position: absolute;
  inset: 0;
  min-height: 0;
  overflow: hidden;
  padding: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(185,242,59,.08), transparent 42%),
    #050609;
}

.stage-wrap::before {
  content: attr(data-drop-hint);
  position: absolute;
  left: 1.1rem;
  top: 1rem;
  color: rgba(255,255,255,.25);
  font-size: 0.72rem;
  font-weight: 950;
  pointer-events: none;
}

.stage-wrap.drag-over {
  outline: 2px solid var(--accent);
  outline-offset: -0.55rem;
}

#stage {
  display: inline-block;
  background:
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    #080a0f;
  background-size: 4rem 4rem;
  box-shadow: inset 0 0 2.1rem rgba(0,0,0,.72);
  transition: transform .336s ease;
}

.showcase-mode {
  background: #050609;
}

.showcase-mode .layout {
  inset: 0;
}

.showcase-mode .left-column,
.showcase-mode .inspector,
.showcase-mode .center-toolbar,
.showcase-mode footer {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.showcase-mode .left-column {
  transform: translateX(-112%);
}

.showcase-mode .inspector {
  transform: translateX(112%);
}

.showcase-mode .center-toolbar {
  transform: translateY(calc(-100% - 1rem));
}

.showcase-mode .canvas-toolbar {
  opacity: 0;
  visibility: hidden;
  transform: translateY(calc(-100% - 10rem));
  pointer-events: none;
}

.showcase-mode footer {
  display: none;
}

.showcase-mode .center-toolbar,
.showcase-mode .canvas-toolbar,
.showcase-mode footer {
  pointer-events: none;
}

.showcase-mode .center-column {
  inset: 0;
  gap: 0;
  pointer-events: auto;
}

.canvas-panel,
.showcase-mode .canvas-panel {
  position: absolute;
  inset: 0;
  display: block;
  border: 0;
  background: transparent;
  pointer-events: auto;
}

.stage-wrap,
.showcase-mode .stage-wrap {
  width: 100%;
  height: 100%;
}

.showcase-mode .stage-wrap::before {
  display: none;
}

.showcase-mode #stage {
  display: block;
  margin: 0 auto;
  box-shadow: none;
}

.showcase-mode .konvajs-content {
  margin: 0 auto;
}

.showcase-mode .element-item.selected,
.showcase-mode .element-item.drag-target,
.showcase-mode .element-item.drag-target-before,
.showcase-mode .element-item.drag-target-after {
  border-color: transparent;
  box-shadow: none;
}

.edit-mode .left-column,
.edit-mode .inspector,
.edit-mode .center-toolbar,
.edit-mode .canvas-toolbar {
  opacity: 1;
  visibility: visible;
  transform: translate(0, 0);
}

.inspector {
  min-height: 0;
}

.inspector-scroll {
  min-height: 0;
  overflow: auto;
}

.resizable-list {
  min-height: 7rem;
  max-height: 46vh;
  height: 13rem;
  resize: vertical;
  overflow: hidden;
  margin: 0 0 0.72rem;
  border: 1px solid var(--line);
  background: var(--panel-2);
}

.element-list {
  height: 100%;
  display: grid;
  gap: 0.4rem;
  overflow: auto;
  padding: 0.5rem;
}

.element-item {
  border: 1px solid var(--line);
  padding: 0.48rem;
  background: rgba(255,255,255,.06);
  cursor: grab;
}

.element-item.selected {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 2px rgba(185,242,59,.13);
}

.element-item.drag-target,
.element-item.drag-target-before,
.element-item.drag-target-after {
  border-color: var(--accent);
}

.element-item.drag-target-before,
.element-item.drag-target-after {
  position: relative;
}

.element-item.drag-target-before::before,
.element-item.drag-target-after::after {
  content: "";
  position: absolute;
  left: 0.38rem;
  right: 0.38rem;
  height: 2px;
  background: var(--accent);
}

.element-item.drag-target-before::before {
  top: -2px;
}

.element-item.drag-target-after::after {
  bottom: -2px;
}

.element-line {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.74rem;
}

.element-drag-ghost {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9999;
  pointer-events: none;
  min-width: 8rem;
  max-width: 16rem;
  border: 1px solid var(--accent);
  padding: 0.46rem 0.58rem;
  background: rgba(12, 15, 21, .92);
  box-shadow: 0 0.8rem 1.5rem rgba(0,0,0,.35);
  opacity: .9;
}

.inline-pair,
.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.52rem;
}

.type-chip {
  display: inline-block;
  width: fit-content;
  margin: 0.24rem 0;
  padding: 0.1rem 0.45rem;
  border: 1px solid var(--line);
  color: var(--accent-2);
  background: rgba(120, 215, 255, .08);
  font-size: 0.68rem;
  font-weight: 950;
}

.drop-target.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(185,242,59,.14);
}

.inspector-form input[type="number"] {
  cursor: ew-resize;
}

button {
  min-height: 2.25rem;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0 0.68rem;
  background: rgba(255, 255, 255, 0.07);
  color: var(--ink);
  cursor: pointer;
  font-weight: 950;
}

button:hover,
button.active-toggle {
  border-color: var(--accent);
  color: var(--accent);
}

button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #111;
}

button.danger,
#edgeSnapBtn {
  border-color: rgba(239,75,75,.58);
  background: rgba(239,75,75,.16);
  color: #ff8b8b;
}

#edgeSnapBtn.active-toggle,
#dynamicSimBtn.active-toggle {
  border-color: var(--accent);
  background: rgba(185,242,59,.15);
  color: var(--accent);
}

#dynamicSimBtn {
  border-color: rgba(120,215,255,.32);
  color: var(--accent-2);
}

#exportBtn {
  display: none;
}

footer {
  min-height: 2rem;
  padding: 0.46rem 0.72rem;
  border-top: 1px solid var(--line);
  background: rgba(7,9,13,.94);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
}

::-webkit-scrollbar {
  width: 0.52rem;
  height: 0.52rem;
}

::-webkit-scrollbar-track {
  background: rgba(255,255,255,.04);
}

::-webkit-scrollbar-thumb {
  background: rgba(185,242,59,.42);
}

@media (max-width: 1250px) {
  html,
  body {
    overflow: auto;
  }

  .app-shell {
    min-height: 100vh;
    height: auto;
  }

  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  .resource-list,
  .inspector-scroll,
  .stage-wrap {
    max-height: 54vh;
  }
}