:root {
  --bg: #1d1f22;
  --panel: #25282d;
  --panel-2: #2d3137;
  --panel-3: #181a1d;
  --border: #3b4047;
  --text: #e8ebef;
  --muted: #9ca3ad;
  --accent: #4fa3ff;
  --accent-2: #ff8f3f;
  --danger: #ff6161;
  --checker-a: #2d3137;
  --checker-b: #383d44;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #131517;
  color: var(--text);
}

body {
  height: 100vh;
  overflow: hidden;
}

button,
input,
select,
summary {
  font: inherit;
}

button,
summary {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-rows: 52px 1fr 34px;
  height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(79, 163, 255, 0.08), transparent 20%),
    radial-gradient(circle at top right, rgba(255, 143, 63, 0.06), transparent 24%),
    #181a1d;
}

.menu-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 14px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #25292e 0%, #1d2024 100%);
}

.brand {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-group {
  display: flex;
  align-items: center;
  gap: 2px;
}

.menu {
  position: relative;
}

.menu > summary {
  list-style: none;
  padding: 8px 11px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  transition: background 140ms ease, color 140ms ease;
}

.menu > summary::-webkit-details-marker {
  display: none;
}

.menu[open] > summary,
.menu > summary:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.menu-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  display: grid;
  gap: 6px;
  min-width: 220px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: var(--shadow);
  z-index: 50;
}

.menu-dropdown button,
.ghost-button,
.panel-actions button,
.swap-button {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #30353c;
  color: var(--text);
  padding: 7px 10px;
}

.menu-dropdown button:hover,
.ghost-button:hover,
.panel-actions button:hover,
.swap-button:hover {
  border-color: rgba(79, 163, 255, 0.5);
  background: #3a4048;
}

.menu-field,
.tool-settings label,
.color-panel label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 0.84rem;
}

.header-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
}

.workspace-shell {
  display: grid;
  grid-template-columns: 108px 1fr 320px;
  min-height: 0;
}

.left-panel,
.right-panel {
  display: grid;
  gap: 10px;
  padding: 12px;
  background: rgba(26, 29, 33, 0.92);
}

.left-panel {
  border-right: 1px solid var(--border);
  grid-template-rows: auto 1fr;
}

.right-panel {
  border-left: 1px solid var(--border);
  grid-template-rows: minmax(220px, 1fr) auto;
}

.toolbar {
  display: grid;
  gap: 8px;
}

.tool-button {
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(180deg, #2d3137 0%, #25292e 100%);
  padding: 12px;
  color: var(--muted);
  transition: 140ms ease;
}

.tool-button:hover,
.tool-button.active {
  transform: translateY(-1px);
  color: var(--text);
  border-color: rgba(79, 163, 255, 0.65);
  box-shadow: 0 0 0 1px rgba(79, 163, 255, 0.15);
}

.tool-button svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.panel {
  background: linear-gradient(180deg, rgba(46, 50, 57, 0.92), rgba(35, 38, 44, 0.98));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.tool-settings {
  align-content: start;
}

.tool-settings,
.color-panel {
  display: grid;
  gap: 10px;
}

.tool-readout {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 2px;
  padding-top: 2px;
  font-size: 0.85rem;
}

.canvas-stage {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 40%),
    #14171a;
}

.canvas-scroller {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.canvas-wrap {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

#editorCanvas {
  background-image:
    linear-gradient(45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-a) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-a) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-color: var(--checker-b);
  border: 1px solid #4d535c;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  image-rendering: pixelated;
  max-width: none;
}

.drop-overlay {
  position: absolute;
  inset: 18px;
  display: none;
  place-items: center;
  border: 2px dashed rgba(79, 163, 255, 0.7);
  border-radius: 22px;
  background: rgba(17, 21, 26, 0.84);
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.drop-overlay.visible {
  display: grid;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.panel-actions {
  display: flex;
  gap: 6px;
}

.layers-list {
  display: grid;
  gap: 8px;
  max-height: 100%;
  overflow: auto;
}

.layer-item {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(19, 22, 26, 0.65);
}

.layer-item.active {
  border-color: rgba(79, 163, 255, 0.6);
  box-shadow: 0 0 0 1px rgba(79, 163, 255, 0.12);
}

.layer-eye {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #2f353c;
  color: var(--text);
}

.layer-main {
  display: grid;
  gap: 6px;
}

.layer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.layer-title {
  background: none;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 0;
}

.layer-controls {
  display: flex;
  gap: 4px;
}

.layer-control {
  border: 1px solid var(--border);
  background: #2d3137;
  color: var(--text);
  border-radius: 6px;
  width: 28px;
  height: 28px;
}

.layer-opacity {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.78rem;
}

.spectrum-wrap {
  display: grid;
  gap: 8px;
}

#colorSquare,
#hueSlider {
  width: 100%;
  display: block;
  border-radius: 10px;
  border: 1px solid var(--border);
  cursor: crosshair;
}

#hueSlider {
  height: 18px;
}

.swatches {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 2px;
}

.swatch {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 2px solid rgba(255, 255, 255, 0.1);
}

.recent-colors {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  margin-top: 4px;
}

.recent-color {
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 16px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, #1a1d22 0%, #13161a 100%);
  color: var(--muted);
  font-size: 0.85rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

input[type="text"],
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #20242a;
  color: var(--text);
  padding: 7px 10px;
}

@media (max-width: 1180px) {
  .workspace-shell {
    grid-template-columns: 92px 1fr 280px;
  }
}

@media (max-width: 940px) {
  .workspace-shell {
    grid-template-columns: 82px 1fr;
  }

  .right-panel {
    position: absolute;
    top: 52px;
    right: 0;
    bottom: 34px;
    width: 280px;
    transform: translateX(calc(100% - 24px));
    transition: transform 180ms ease;
    z-index: 15;
  }

  .right-panel:hover {
    transform: translateX(0);
  }
}