/* Manic Miner Construction Kit — dark modern theme */
:root {
  --bg:          #0d1117;
  --panel:       #161b22;
  --panel2:      #1c2128;
  --border:      #30363d;
  --text:        #c9d1d9;
  --text-muted:  #8b949e;
  --accent:      #58a6ff;
  --accent-h:    #79b8ff;
  --success:     #3fb950;
  --danger:      #f85149;
  --warning:     #d29922;
  --active:      #21262d;
  --hover:       #1c2128;
  --radius:      6px;
  --header-h:    48px;
  --bottom-h:    260px;
  --levels-w:    168px;
  --props-w:     210px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 12px;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */

.app-header {
  height: var(--header-h);
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent);
  flex: 1;
}

.brand-gem { font-size: 22px; }

.header-actions { display: flex; gap: 8px; }

/* ── Workspace layout ───────────────────────────────────────────────────────── */

.workspace {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ── Side panels ────────────────────────────────────────────────────────────── */

.panel {
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.panel-levels {
  width: var(--levels-w);
  border-right: 1px solid var(--border);
}

.panel-props {
  width: var(--props-w);
  border-left: 1px solid var(--border);
}

.panel-header {
  padding: 8px 10px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-footer {
  padding: 6px 8px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ── Level list ─────────────────────────────────────────────────────────────── */

.level-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
}

.level-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 11px;
  transition: background 0.1s;
  overflow: hidden;
}
.level-item:hover { background: var(--hover); }
.level-item.active { background: var(--active); color: var(--accent); font-weight: 600; }

.level-num {
  font-size: 10px;
  color: var(--text-muted);
  min-width: 20px;
  text-align: right;
  flex-shrink: 0;
}
.level-name-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Editor main ────────────────────────────────────────────────────────────── */

.editor-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ── Toolbar ────────────────────────────────────────────────────────────────── */

.toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 3px;
}

.tool-sep {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 6px;
}

.tool-btn {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 11px;
  font-family: inherit;
  white-space: nowrap;
  transition: all 0.1s;
}
.tool-btn:hover { background: var(--hover); border-color: var(--accent); }
.tool-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

.zoom-label {
  font-size: 13px;
  font-weight: 700;
  min-width: 24px;
  text-align: center;
  color: var(--accent);
}
.tool-label { font-size: 11px; color: var(--text-muted); }
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: var(--radius);
  transition: background 0.1s;
}
.checkbox-row:hover { background: var(--hover); }

/* ── Canvas area ────────────────────────────────────────────────────────────── */

.canvas-scroll {
  flex: 1;
  overflow: auto;
  background: #070b10;
  padding: 16px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}

.canvas-container { display: inline-block; line-height: 0; }

#level-canvas {
  display: block;
  cursor: crosshair;
  image-rendering: pixelated;
  box-shadow: 0 4px 32px rgba(0,0,0,0.6);
}

/* ── Level meta bar ─────────────────────────────────────────────────────────── */

.level-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 14px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.level-meta label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── Bottom panel ───────────────────────────────────────────────────────────── */

.bottom-panel {
  display: flex;
  height: var(--bottom-h);
  background: var(--panel);
  border-top: 2px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.gfx-palette-section {
  width: 330px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.designer-section {
  flex: 1;
  min-width: 420px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-left: 1px solid var(--border);
}

.section-header {
  padding: 6px 12px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.hint-small {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  font-size: 10px;
  color: var(--text-muted);
  opacity: 0.7;
}

/* ── GFX slot palette ───────────────────────────────────────────────────────── */

.gfx-slots-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px;
  overflow-y: auto;
  flex: 1;
  align-content: flex-start;
}

.gfx-slot {
  width: 52px;
  height: 52px;
  border: 2px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color 0.1s, box-shadow 0.1s;
  display: flex;
  align-items: stretch;
  background: #000;
}
.gfx-slot canvas {
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  display: block;
}
.gfx-slot:hover { border-color: var(--accent); }
.gfx-slot.paint-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(88,166,255,0.4);
}
.gfx-slot.design-active {
  border-bottom-color: var(--success);
}
.gfx-slot.paint-active.design-active {
  box-shadow: 0 0 0 2px rgba(88,166,255,0.4), inset 0 -2px 0 var(--success);
}

.gfx-slot-num {
  position: absolute;
  top: 2px;
  left: 3px;
  font-size: 9px;
  color: rgba(255,255,255,0.7);
  text-shadow: 0 0 4px #000, 0 0 2px #000;
  line-height: 1;
  pointer-events: none;
}
.gfx-slot-badge {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  font-size: 8px;
  text-align: center;
  color: rgba(255,255,255,0.9);
  padding: 1px 0;
  pointer-events: none;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* ── Tile designer ──────────────────────────────────────────────────────────── */

.designer-layout {
  display: flex;
  gap: 16px;
  padding: 10px 14px;
  flex: 1;
  overflow: hidden;
  align-items: flex-start;
}

#sprite-designer-canvas {
  border: 1px solid var(--border);
  cursor: crosshair;
  image-rendering: pixelated;
  flex-shrink: 0;
  border-radius: 3px;
}

.designer-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 170px;
}

.ctrl-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.preview-label {
  font-size: 10px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

#tile-preview {
  border: 1px solid var(--border);
  image-rendering: pixelated;
  display: block;
  border-radius: 3px;
}

/* ── Properties panel ───────────────────────────────────────────────────────── */

.panel-props {
  overflow-y: auto;
}

.props-section {
  padding: 10px;
}

.prop-row {
  margin-bottom: 10px;
}
.prop-row label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.hint-text {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.6;
  padding: 4px 0;
}

.robot-preview, .portal-preview, .miner-preview {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  background: #000;
  min-height: 52px;
}
.robot-preview canvas,
.portal-preview canvas,
.miner-preview canvas {
  image-rendering: pixelated;
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--active);
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  font-family: inherit;
  transition: all 0.1s;
  white-space: nowrap;
}
.btn:hover { background: var(--hover); border-color: var(--accent); color: var(--accent-h); }
.btn-primary   { background: var(--accent);   border-color: var(--accent);   color: #fff; font-weight: 700; }
.btn-primary:hover { background: var(--accent-h); }
.btn-success   { background: rgba(63,185,80,0.2); border-color: var(--success); color: var(--success); }
.btn-success:hover { background: rgba(63,185,80,0.3); }
.btn-danger    { background: rgba(248,81,73,0.15); border-color: var(--danger); color: var(--danger); }
.btn-danger:hover  { background: rgba(248,81,73,0.25); }
.btn-sm { padding: 3px 8px; font-size: 11px; }

/* ── Form controls ──────────────────────────────────────────────────────────── */

.input-text {
  padding: 4px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 12px;
  font-family: inherit;
  width: 170px;
  transition: border-color 0.1s;
}
.input-text:focus { outline: none; border-color: var(--accent); }

.input-num {
  padding: 4px 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 12px;
  font-family: inherit;
  width: 70px;
  transition: border-color 0.1s;
}
.input-num:focus { outline: none; border-color: var(--accent); }

.input-sel {
  padding: 4px 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 11px;
  font-family: inherit;
  transition: border-color 0.1s;
}
.input-sel:focus { outline: none; border-color: var(--accent); }

/* ── Scrollbars ─────────────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }