:root {
  --bg: #fdf1fb;
  --bg-panel: #fffafd;
  --bg-panel-2: #fbe9f7;
  --border: #f0bfe6;
  --text: #5b3468;
  --text-dim: #9b74ab;
  --accent: #d94fb8;
  --accent-2: #ffb84d;
  --danger: #ff6b81;
  --success: #4fd6a8;

  --rainbow-1: #c9a6f5;
  --rainbow-2: #a6c8f5;
  --rainbow-3: #a6f5d4;
  --rainbow-4: #f5ef9c;
  --rainbow-5: #f5c99c;
  --rainbow-6: #f5a6d9;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #ffe6f7 0%, #eee2ff 45%, #e2f3ff 100%) fixed;
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  height: 100%;
  overflow: hidden;
}

button {
  font-family: inherit;
  cursor: pointer;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

#topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  background: var(--bg-panel);
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--rainbow-1), var(--rainbow-2), var(--rainbow-3), var(--rainbow-4), var(--rainbow-5), var(--rainbow-6)) 1;
  box-shadow: 0 1px 8px rgba(217, 79, 184, 0.12);
}

#topbar h1 {
  font-size: 20px;
  margin: 0;
  background: linear-gradient(90deg, #d94fb8, #7c53b3, #4779ad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}

#level-info {
  color: var(--text-dim);
  flex: 1;
}

#btn-level-select, #btn-fullscreen {
  background: var(--bg-panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
}
#btn-level-select:hover, #btn-fullscreen:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.screen {
  flex: 1;
  min-height: 0;
  padding: 20px;
  overflow: auto;
}
.screen.hidden {
  display: none;
}

#screen-select h2 {
  margin-top: 0;
  color: var(--text);
}

#level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  max-width: 1100px;
}

.level-card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text);
  transition: transform 0.12s, border-color 0.12s;
  box-shadow: 0 2px 6px rgba(217, 79, 184, 0.08);
}
.level-card:not(:disabled):hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}
.level-card .level-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
}
.level-card .level-title {
  font-size: 14px;
  text-align: center;
  color: var(--text-dim);
}
.level-card.completed {
  border-color: var(--success);
}
.level-card.completed .level-check {
  position: absolute;
  top: 8px;
  right: 10px;
  color: var(--success);
}
.level-card.locked {
  opacity: 0.45;
}
.level-card .level-lock {
  position: absolute;
  top: 8px;
  right: 10px;
}

#game-layout {
  display: grid;
  grid-template-columns: 220px 260px 1fr;
  gap: 14px;
  height: 100%;
  min-height: 0;
}

#palette-panel, #program-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  overflow-y: auto;
  min-height: 0;
  box-shadow: 0 2px 6px rgba(217, 79, 184, 0.08);
}

#palette-panel h3, #program-panel h3 {
  margin-top: 0;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

#intro-text {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

#palette {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.palette-block, .block-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  user-select: none;
}

.palette-block {
  cursor: grab;
}
.palette-block.dragging {
  opacity: 0.4;
}

.palette-block.block-forward, .block-row.block-forward { border-left: 4px solid #7ea9ec; }
.palette-block.block-right, .block-row.block-right,
.palette-block.block-left, .block-row.block-left { border-left: 4px solid #b58bf0; }
.palette-block.block-jump, .block-row.block-jump { border-left: 4px solid #f0a25e; }
.palette-block.block-action, .block-row.block-action { border-left: 4px solid #ffc94d; }
.palette-block.block-loop, .block-row.block-loop { border-left: 4px solid #4fd6a8; }

.block-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}
.block-label {
  flex: 1;
}

#board-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-width: 0;
  min-height: 0;
}

.scene {
  flex: 1;
  width: 100%;
  min-height: 0;
  overflow: auto;
  background: radial-gradient(ellipse at center, #f3e0ff 0%, #dceeff 60%, #d6f5ea 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px;
}

.board {
  position: relative;
  flex: none;
}

.tile {
  position: absolute;
}
.tile-face {
  position: absolute;
}
.tile-top {
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  border: 2px solid rgba(91, 52, 104, 0.28);
  display: flex;
  align-items: center;
  justify-content: center;
}
.tile-left {
  transform-origin: top left;
  border-right: 1px solid rgba(0, 0, 0, 0.2);
}
.tile-right {
  transform-origin: top left;
  border-left: 1px solid rgba(0, 0, 0, 0.2);
}
.tile-hole .tile-left, .tile-hole .tile-right {
  background: #2b1f3d;
}
.tile-hole .tile-top {
  display: none;
}

.goal-marker {
  font-size: 20px;
  filter: drop-shadow(0 0 4px rgba(255, 184, 77, 0.9));
  transition: transform 0.2s;
}
.goal-lit {
  filter: brightness(1.35) drop-shadow(0 0 10px var(--success));
}
.goal-pulse .goal-marker {
  transform: scale(1.6);
}

.robot {
  position: absolute;
  transform: translate(-50%, -68%);
  transition: left 0.32s ease, top 0.32s ease;
  z-index: 50;
  pointer-events: none;
}
.robot.no-transition {
  transition: none;
}
.robot-emoji {
  font-size: 34px;
  position: relative;
  z-index: 2;
  text-align: center;
  filter: drop-shadow(0 3px 3px rgba(0, 0, 0, 0.35));
  transition: transform 0.2s ease;
}
/* .robot-dir er et usynlig dreiepunkt midt i figuren; .robot-arrow er
   forskjøvet ut fra punktet slik at den svinger som en kompassnål når
   dreiepunktet roteres - selve figuren over roteres aldri. */
.robot-dir {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  transition: transform 0.32s ease;
  transform: rotate(90deg);
  z-index: 1;
}
.robot-arrow {
  position: absolute;
  left: -8px;
  top: -42px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 14px solid var(--accent-2);
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.4));
}
.robot.robot-bump .robot-emoji {
  animation: bump 0.4s ease;
}
.robot.robot-jump .robot-emoji {
  animation: jump 0.38s ease;
}
.robot.robot-fall {
  animation: fall 0.6s ease forwards;
}
@keyframes bump {
  0%, 100% { transform: translateX(0); }
  30% { transform: translateX(-6px); }
  60% { transform: translateX(6px); }
}
@keyframes jump {
  0%, 100% { transform: translateY(0) scale(1); }
  40% { transform: translateY(-22px) scale(1.05); }
}
@keyframes fall {
  to { transform: translate(-50%, -68%) translateY(140px) rotate(25deg); opacity: 0; }
}

#counters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.counter-chip {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text-dim);
}

#controls {
  display: flex;
  gap: 10px;
}
#controls button {
  background: var(--bg-panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 14px;
}
#btn-run {
  background: linear-gradient(90deg, var(--accent), #7c53b3);
  color: #fff;
  font-weight: 600;
  border-color: var(--accent);
}
#btn-stop {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
#controls button:hover {
  filter: brightness(1.08);
}
#controls button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#program-list {
  min-height: 160px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-radius: 8px;
  border: 2px dashed transparent;
  padding-bottom: 70px;
}
.main-empty-hint, .loop-empty-hint {
  color: var(--text-dim);
  font-size: 12px;
  text-align: center;
  padding: 10px;
  border: 1px dashed var(--border);
  border-radius: 8px;
}

.block-row {
  flex-direction: column;
  padding: 0;
  gap: 0;
  cursor: grab;
}
.block-row .block-content {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  width: 100%;
}
.block-row.dragging {
  opacity: 0.4;
}
.block-row.block-active {
  outline: 2px solid var(--accent-2);
  box-shadow: 0 0 10px rgba(255, 184, 77, 0.5);
}

.block-delete {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 6px;
}
.block-delete:hover {
  color: var(--danger);
  background: rgba(255, 107, 129, 0.15);
}

.loop-stepper {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-panel);
  border-radius: 6px;
  padding: 2px 4px;
}
.loop-stepper button {
  background: var(--border);
  color: var(--text);
  border: none;
  border-radius: 4px;
  width: 20px;
  height: 20px;
  font-size: 13px;
  line-height: 1;
}
.loop-count {
  font-size: 12px;
  min-width: 22px;
  text-align: center;
}

.loop-body {
  margin: 0 10px 10px 10px;
  padding: 8px 8px 34px 8px;
  border-radius: 8px;
  background: rgba(217, 79, 184, 0.06);
  border: 2px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 64px;
}

.dropzone.drag-over {
  border-color: var(--accent);
  background: rgba(217, 79, 184, 0.08);
}
.dropzone.drop-invalid {
  border-color: var(--danger) !important;
  animation: shake 0.35s;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.locked {
  pointer-events: none;
  opacity: 0.7;
}

#overlay {
  position: fixed;
  inset: 0;
  background: rgba(91, 52, 104, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
#overlay.hidden {
  display: none;
}
#overlay-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 32px;
  max-width: 380px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(91, 52, 104, 0.25);
}
#overlay-box h2 {
  margin-top: 0;
}
#overlay-box p {
  color: var(--text-dim);
  line-height: 1.5;
}
#overlay-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 16px;
}
#overlay-actions button {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 18px;
  background: var(--bg-panel-2);
  color: var(--text);
}
#overlay-actions .btn-primary {
  background: linear-gradient(90deg, var(--accent), #7c53b3);
  color: #fff;
  font-weight: 600;
  border-color: var(--accent);
}

@media (max-width: 900px) {
  #game-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    height: auto;
  }
  #palette-panel {
    order: 1;
  }
  #program-panel {
    order: 2;
  }
  #board-panel {
    order: 3;
  }
}