:root {
  --bg-0: #17181b;
  --bg-1: #1e2024;
  --bg-2: #26282d;
  --bg-3: #313339;
  --bg-4: #3c3f46;
  --border: #3a3d44;
  --border-light: #4a4d55;
  --text-0: #e8e9ec;
  --text-1: #b7bac2;
  --text-2: #82858e;
  --accent: #4da3ff;
  --accent-dim: #2a6fc9;
  --accent-soft: rgba(77, 163, 255, 0.15);
  --danger: #ff5d5d;
  --warn: #ffb648;
  --ok: #4ad991;
  --grid-line: rgba(255, 255, 255, 0.06);
  --grid-line-strong: rgba(255, 255, 255, 0.14);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg-0);
  color: var(--text-0);
  font-size: 13px;
  overflow: hidden;
  user-select: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-0);
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.08s, border-color 0.08s;
}
button:hover { background: var(--bg-4); border-color: var(--border-light); }
button:active { background: var(--accent-dim); }
button.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #08131f;
  font-weight: 600;
}
button.primary:hover { background: #6db4ff; }
button.danger { border-color: var(--danger); color: var(--danger); }

/* DEMO LOCK MODAL — the "Get the Full Version" action is a real link (opens
   the purchase page in a new tab), styled to match button.primary exactly
   since the shared button rules above only target the <button> tag. */
.modal-actions a.primary {
  font-family: inherit; font-size: inherit; font-weight: 600;
  background: var(--accent); border: 1px solid var(--accent); border-radius: 4px;
  padding: 5px 10px; cursor: pointer; color: #08131f;
  transition: background 0.08s, border-color 0.08s;
}
.modal-actions a.primary:hover { background: #6db4ff; }

/* DEMO BANNER */
#demo-banner {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  padding: 6px 12px; font-size: 12px; font-weight: 600;
  background: linear-gradient(90deg, #4a3410, #5a3f14); color: #ffce6b;
  border-bottom: 1px solid #7a5a1c; flex-shrink: 0;
}
#demo-banner a { color: #ffe4a3; text-decoration: underline; }
#demo-banner a:hover { color: #fff2d4; }
button:disabled { opacity: 0.4; cursor: not-allowed; }

select, input[type="text"], input[type="number"] {
  font-family: inherit;
  font-size: inherit;
  background: var(--bg-1);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
}

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

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

/* ---------- TOP TOOLBAR ---------- */
#top-toolbar {
  height: 44px;
  min-height: 44px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
}

.menu-bar {
  display: flex;
  align-items: center;
  gap: 2px;
}
.menu-item {
  position: relative;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-1);
  font-weight: 500;
}
.menu-item:hover, .menu-item.open { background: var(--bg-3); color: var(--text-0); }
.menu-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  min-width: 200px;
  padding: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 100;
}
.menu-item.open .menu-dropdown { display: block; }
.menu-dropdown-item {
  padding: 7px 10px;
  border-radius: 4px;
  color: var(--text-0);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}
.menu-dropdown-item:hover { background: var(--accent-soft); color: var(--accent); }
.menu-dropdown-item .shortcut { color: var(--text-2); font-size: 11px; }
.menu-separator { height: 1px; background: var(--border); margin: 4px 2px; }

.mode-actions { display: flex; gap: 6px; align-items: center; }
.mode-actions button { font-weight: 600; letter-spacing: 0.03em; padding: 7px 14px; }
.mode-actions .brand {
  color: var(--text-2);
  font-size: 12px;
  margin-right: 14px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mode-actions .brand b { color: var(--text-0); }
.mode-actions .brand-icon { width: 22px; height: 22px; display: block; flex-shrink: 0; }

/* ---------- WORKSPACE ---------- */
#workspace { flex: 1; display: flex; min-height: 0; }

#left-panel, #right-panel {
  background: var(--bg-1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  min-width: 0;
}
#left-panel { width: 210px; border-right: 1px solid var(--border); }
#right-panel { width: 260px; border-left: 1px solid var(--border); }

.panel { border-bottom: 1px solid var(--border); padding: 10px; }
.panel-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-2);
  margin-bottom: 8px;
}

/* TOOLS */
.tool-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; }
.tool-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  padding: 0;
}

/* PALETTE */
.palette-list { display: flex; flex-direction: column; gap: 3px; }
.palette-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
}
.palette-item:hover { background: var(--bg-3); }
.palette-item.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.palette-swatch {
  width: 16px; height: 16px; border-radius: 3px; flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.15);
}
.palette-item .label { font-size: 12.5px; }
.palette-item .key { margin-left: auto; color: var(--text-2); font-size: 10.5px; }
.palette-theme-btn {
  margin-left: auto; flex-shrink: 0; padding: 2px 6px; font-size: 11px;
  background: transparent; border: 1px solid transparent; color: var(--text-2);
}
.palette-item .key + .palette-theme-btn { margin-left: 6px; }
.palette-theme-btn:hover { background: var(--bg-4); border-color: var(--border-light); color: var(--text-0); }
.palette-bg-item { border-top: 1px solid var(--border); margin-top: 6px; padding-top: 10px; }

/* THEME MODAL (palette color/image customization) */
.theme-preview { display: flex; justify-content: center; margin-bottom: 12px; }
.theme-preview-swatch {
  width: 72px; height: 72px; border-radius: 8px; border: 1px solid var(--border-light);
  background-position: center; background-repeat: no-repeat;
}
.theme-preview-wide { width: 100%; }
.theme-preview-swatch-wide { width: 100%; height: 100px; border-radius: 8px; }

/* GRID SIZE */
.field-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; gap: 8px; }
.field-row label { color: var(--text-1); font-size: 12px; }
.field-row select, .field-row input { width: 110px; }

/* ---------- CENTER STAGE ---------- */
#center-stage {
  flex: 1;
  position: relative;
  background: #101114;
  overflow: hidden;
}
.mode-view { position: absolute; inset: 0; display: none; }
.mode-view.active { display: block; }

#editor-canvas-wrap {
  position: absolute; inset: 0; overflow: hidden; cursor: crosshair;
}
#editor-canvas-wrap canvas { position: absolute; top: 0; left: 0; image-rendering: pixelated; }

.canvas-reset-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 20;
  background: rgba(20, 21, 25, 0.85);
  backdrop-filter: blur(2px);
}

/* GENERATOR */
#generator-view { display: flex; height: 100%; }
#generator-params {
  width: 300px;
  border-right: 1px solid var(--border);
  background: var(--bg-1);
  padding: 14px;
  overflow-y: auto;
}
#generator-params h3 { margin: 0 0 12px; font-size: 13px; color: var(--text-0); }
#generator-results { flex: 1; overflow-y: auto; padding: 16px; }
.variation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 14px;
}
.variation-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.1s, transform 0.1s;
}
.variation-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.variation-card.selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.variation-card canvas { width: 100%; display: block; background: #0c0d10; }
.variation-card .meta { padding: 8px 10px; }
.variation-card .meta .title { font-size: 12px; font-weight: 600; }
.variation-card .meta .diff { font-size: 11px; color: var(--text-2); margin-top: 2px; }
.variation-card .meta .valid-badge { font-size: 10px; padding: 1px 6px; border-radius: 3px; margin-top: 4px; display: inline-block; }
.valid-badge.valid { background: rgba(74,217,145,0.15); color: var(--ok); }
.valid-badge.invalid { background: rgba(255,93,93,0.15); color: var(--danger); }

/* PLAYTEST */
#playtest-view { position: absolute; inset: 0; }
#playtest-canvas-wrap { position: absolute; inset: 0; background: #0c0d10; }
#playtest-hud {
  position: absolute; top: 12px; left: 12px; display: flex; gap: 10px; pointer-events: none;
}
.hud-tile {
  background: rgba(20,21,25,0.85);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  min-width: 64px;
  text-align: center;
}
.hud-tile .hud-label { font-size: 9px; color: var(--text-2); letter-spacing: 0.08em; }
.hud-tile .hud-value { font-size: 16px; font-weight: 700; color: var(--text-0); }
/* Key count badge — separate from the TIME/DEATHS/COINS/PROGRESS row and
   pinned to the top-right corner (holds the running "keys available to
   spend on a door" count). Hidden entirely when the level has no keys. */
#playtest-keys-badge {
  position: absolute; top: 12px; right: 12px; z-index: 2; pointer-events: none;
  display: flex; align-items: center; gap: 6px;
  background: rgba(20,21,25,0.85); border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 12px; font-size: 16px; font-weight: 700; color: var(--text-0);
}
#playtest-keys-badge.hidden { display: none; }
.keys-badge-icon { font-size: 17px; }
#playtest-controls { position: absolute; bottom: 12px; left: 12px; display: flex; gap: 8px; }
#playtest-touch-controls { display: none; }
@media (pointer: coarse) {
  /* position: absolute + inset: 0 (not just "block") so this container
     actually occupies the canvas area — its children are all
     position:absolute buttons, which would otherwise leave it collapsed
     to a 0x0 box even while "visible". pointer-events: none lets clicks
     pass through everywhere except the buttons themselves. */
  #playtest-touch-controls { display: block; position: absolute; inset: 0; pointer-events: none; }
}
.playtest-touch-btn {
  position: absolute; z-index: 4; width: 60px; height: 60px; border-radius: 50%;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25); color: var(--text-0);
  font-size: 22px; display: flex; align-items: center; justify-content: center;
  user-select: none; touch-action: none; -webkit-tap-highlight-color: transparent;
  pointer-events: auto;
}
.playtest-touch-btn:active { background: rgba(255,255,255,0.24); }
#playtest-touch-left { left: 16px; bottom: 70px; }
#playtest-touch-right { left: 88px; bottom: 70px; }
#playtest-touch-jump { right: 16px; bottom: 70px; width: 70px; height: 70px; font-size: 16px; }
#playtest-message {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: rgba(15,16,19,0.92); border: 1px solid var(--border-light); border-radius: 10px;
  padding: 22px 32px; text-align: center; display: none;
}
#playtest-message.show { display: block; }
#playtest-message h2 { margin: 0 0 6px; font-size: 18px; }
#playtest-message p { margin: 0 0 14px; color: var(--text-1); font-size: 12.5px; }

/* LAYERS */
.layer-row {
  display: flex; align-items: center; gap: 6px; padding: 6px 6px; border-radius: 4px; cursor: pointer;
}
.layer-row.active { background: var(--accent-soft); }
.layer-row .layer-name { flex: 1; font-size: 12px; }
.layer-row button { padding: 2px 6px; font-size: 11px; }

/* PROPERTIES */
.prop-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; font-size: 12px; }
.prop-row span.k { color: var(--text-2); }
.empty-hint { color: var(--text-2); font-size: 12px; line-height: 1.5; }

/* VALIDATOR */
.validator-status { padding: 8px 10px; border-radius: 6px; font-weight: 700; font-size: 12px; margin-bottom: 8px; }
.validator-status.valid { background: rgba(74,217,145,0.12); color: var(--ok); }
.validator-status.invalid { background: rgba(255,93,93,0.12); color: var(--danger); }
.validator-status.unknown { background: var(--bg-3); color: var(--text-2); }
.issue-item { font-size: 11.5px; color: var(--text-1); padding: 3px 0; border-bottom: 1px dashed var(--border); }
.issue-item.error { color: var(--danger); }
.issue-item.warning { color: var(--warn); }
.difficulty-bar-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.difficulty-bar-row .lbl { width: 76px; font-size: 11px; color: var(--text-2); }
.difficulty-bar-track { flex: 1; height: 6px; background: var(--bg-3); border-radius: 3px; overflow: hidden; }
.difficulty-bar-fill { height: 100%; background: var(--accent); }
.difficulty-bar-row .val { width: 30px; text-align: right; font-size: 11px; color: var(--text-1); }

/* STATUS BAR */
#status-bar {
  height: 28px; min-height: 28px;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 16px;
  padding: 0 12px;
  font-size: 11.5px;
  color: var(--text-2);
}
#status-bar .sep { width: 1px; height: 14px; background: var(--border); }
#status-bar .spacer { flex: 1; }
#status-bar button { padding: 2px 8px; font-size: 11px; }

/* MODAL */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center; z-index: 1000;
}
.modal-box {
  background: var(--bg-2); border: 1px solid var(--border-light); border-radius: 10px;
  padding: 20px; min-width: 320px; max-width: 90vw; max-height: 85vh; overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-box h3 { margin: 0 0 14px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

/* INFO / ABOUT MODAL */
#info-btn { padding: 6px 10px; font-size: 15px; line-height: 1; border-radius: 50%; }
.info-modal-box h3 { margin: 4px 0 2px; }
.info-logo-wrap {
  background: #fff; border-radius: 10px; padding: 14px 18px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 12px;
}
.info-logo { max-width: 200px; max-height: 90px; width: auto; height: auto; display: block; }
.info-version { text-align: center; color: var(--text-2); font-size: 11px; margin-bottom: 10px; }
.info-desc { text-align: center; color: var(--text-1); font-size: 12.5px; line-height: 1.5; margin: 0 0 16px; }
.info-list { border-top: 1px solid var(--border); padding-top: 10px; }
.info-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: 12.5px; }
.info-label { color: var(--text-2); }
.info-row a { color: var(--accent); text-decoration: none; }
.info-row a:hover { text-decoration: underline; }

/* WELCOME / ONBOARDING MODAL */
.welcome-modal-box h3 { margin: 0 0 6px; }
.welcome-sub { margin: 0 0 16px; color: var(--text-2); font-size: 12.5px; line-height: 1.5; }
.welcome-steps { display: flex; flex-direction: column; gap: 14px; margin-bottom: 4px; }
.welcome-step { display: flex; gap: 12px; align-items: flex-start; }
.welcome-step-icon { font-size: 20px; line-height: 1.3; width: 28px; text-align: center; flex-shrink: 0; }
.welcome-step-title { font-size: 12px; font-weight: 700; letter-spacing: 0.04em; color: var(--accent); margin-bottom: 2px; }
.welcome-step-body { font-size: 12.5px; line-height: 1.5; color: var(--text-1); }
.welcome-modal-box .modal-actions { justify-content: space-between; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-4); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }