/* =============================================
   PLATFORMER CREATOR — Design System
   Dark editor / game-dev tool aesthetic
   Palette: deep slate, electric blue, neon green
   ============================================= */

:root {
  --bg-deep:     #0d0f14;
  --bg-base:     #131720;
  --bg-surface:  #1b2030;
  --bg-raised:   #222840;
  --bg-hover:    #2a3355;

  --accent-blue: #3d8bff;
  --accent-green:#39ff9f;
  --accent-warn: #ffb830;
  --accent-red:  #ff4560;

  --text-primary:  #e8eaf2;
  --text-secondary:#8b92b2;
  --text-dim:      #505878;

  --border:      #2a3050;
  --border-light:#3a4570;

  --tile-size: 24px;

  --sidebar-w: 220px;
  --header-h: 48px;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.5;
}

/* ===== HEADER ===== */
.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 16px;
  z-index: 100;
}

.logo {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: var(--accent-green);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.tab-nav {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.tab-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 6px 18px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-family: inherit;
  font-weight: 500;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--text-primary); background: var(--bg-raised); }
.tab-btn.active {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  background: rgba(61,139,255,0.1);
}

.header-right { display: flex; gap: 8px; align-items: center; }

/* ===== BUTTONS ===== */
.btn-primary {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  padding: 6px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  transition: background 0.15s;
}
.btn-primary:hover { background: #5ba0ff; }

.btn-ghost {
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  transition: all 0.15s;
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--accent-blue); }
.btn-ghost.sm { padding: 4px 10px; font-size: 11px; }
.btn-ghost.full-width { width: 100%; margin-top: 6px; justify-content: center; }
.btn-ghost.active { color: var(--accent-blue); border-color: var(--accent-blue); }

/* ===== TAB CONTENT ===== */
.tab-content {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
}
.tab-content.active { display: flex; }

/* ===== SIDEBARS ===== */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-surface);
  border-color: var(--border);
  overflow-y: auto;
  flex-shrink: 0;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.left-sidebar { border-right: 1px solid var(--border); }
.right-sidebar { border-left: 1px solid var(--border); }

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--bg-raised); border-radius: 2px; }

.sidebar-section {
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}
.sidebar-section:last-child { border-bottom: none; }

.section-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 8px;
}

/* ===== TOOLS ===== */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  background: var(--bg-raised);
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 10px;
  font-family: inherit;
  transition: all 0.15s;
}
.tool-btn:hover { color: var(--text-primary); border-color: var(--border-light); }
.tool-btn.active {
  color: var(--accent-green);
  border-color: var(--accent-green);
  background: rgba(57,255,159,0.08);
}

/* ===== TILE PALETTE ===== */
.tile-palette {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
}

.tile-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 3px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color 0.1s;
  position: relative;
}
.tile-swatch:hover { border-color: var(--border-light); }
.tile-swatch.active { border-color: var(--accent-green); }

/* ===== OBJECT PALETTE ===== */
.object-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.obj-btn {
  padding: 4px 8px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 11px;
  font-family: inherit;
  transition: all 0.15s;
}
.obj-btn:hover { border-color: var(--accent-blue); }
.obj-btn.active { border-color: var(--accent-green); background: rgba(57,255,159,0.08); color: var(--accent-green); }

/* ===== BG OPTIONS ===== */
.bg-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}
.bg-btn {
  padding: 8px 4px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 10px;
  color: #fff;
  font-family: inherit;
  font-weight: 500;
  transition: border-color 0.15s;
}
.bg-btn.active { border-color: var(--accent-green); }

/* ===== FORM CONTROLS ===== */
.input-row { margin-bottom: 6px; }
.input-row label { color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.num-input {
  width: 52px;
  background: var(--bg-deep);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  color: var(--text-primary);
  padding: 3px 6px;
  font-family: inherit;
  font-size: 12px;
}
.num-input.sm { width: 44px; }
.text-input {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  color: var(--text-primary);
  padding: 5px 8px;
  font-family: inherit;
  font-size: 12px;
}
.text-input.center { text-align: center; }
.text-input:focus, .num-input:focus { outline: none; border-color: var(--accent-blue); }

.prop-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.prop-row > label:first-child {
  min-width: 80px;
  color: var(--text-secondary);
  font-size: 12px;
}

.slider {
  flex: 1;
  min-width: 60px;
  accent-color: var(--accent-blue);
  cursor: pointer;
}
.slider-val {
  min-width: 36px;
  text-align: right;
  color: var(--accent-blue);
  font-size: 12px;
  font-weight: 600;
}

/* ===== TOGGLE SWITCH ===== */
.toggle-label { display: flex; align-items: center; gap: 6px; cursor: pointer; color: var(--text-secondary); }
.toggle-label input { display: none; }

.toggle-switch { display: inline-flex; align-items: center; cursor: pointer; }
.toggle-switch input { display: none; }
.toggle-knob {
  width: 32px; height: 16px;
  background: var(--bg-raised);
  border-radius: 8px;
  position: relative;
  border: 1px solid var(--border-light);
  transition: background 0.2s;
}
.toggle-knob::after {
  content: '';
  position: absolute;
  width: 10px; height: 10px;
  background: var(--text-dim);
  border-radius: 50%;
  top: 2px; left: 2px;
  transition: left 0.2s, background 0.2s;
}
.toggle-switch input:checked + .toggle-knob { background: rgba(61,139,255,0.3); border-color: var(--accent-blue); }
.toggle-switch input:checked + .toggle-knob::after { left: 18px; background: var(--accent-blue); }

/* ===== CANVAS AREA ===== */
.canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-deep);
}

.canvas-toolbar {
  height: 36px;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 12px;
}
.canvas-info { color: var(--text-dim); font-size: 11px; font-family: monospace; min-width: 100px; }
.zoom-controls { display: flex; align-items: center; gap: 6px; }
#zoomLabel { color: var(--text-secondary); font-size: 11px; min-width: 40px; text-align: center; }

.canvas-scroll-wrapper {
  flex: 1;
  overflow: auto;
  cursor: crosshair;
  position: relative;
}
.canvas-scroll-wrapper::-webkit-scrollbar { width: 8px; height: 8px; }
.canvas-scroll-wrapper::-webkit-scrollbar-track { background: var(--bg-deep); }
.canvas-scroll-wrapper::-webkit-scrollbar-thumb { background: var(--bg-raised); border-radius: 4px; }

#worldCanvas { display: block; image-rendering: pixelated; }

/* ===== LAYERS ===== */
.layer-list { display: flex; flex-direction: column; gap: 2px; }
.layer-item {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 8px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 11px;
  transition: all 0.15s;
}
.layer-item:hover { background: var(--bg-raised); color: var(--text-primary); }
.layer-item.active { background: rgba(61,139,255,0.12); color: var(--accent-blue); }
.layer-icon { font-size: 10px; }

/* ===== TILE PROPS ===== */
.tile-props { color: var(--text-secondary); font-size: 11px; }
.dim-text { color: var(--text-dim); font-style: italic; }

/* ===== CHARACTER BUILDER ===== */
#tab-character {
  display: none;
  align-items: stretch;
  justify-content: center;
  background: var(--bg-deep);
  padding: 24px;
  overflow-y: auto;
}
#tab-character.active { display: flex; }

.char-builder-layout {
  display: flex;
  gap: 32px;
  max-width: 900px;
  width: 100%;
  align-items: flex-start;
}

.char-preview-panel {
  width: 200px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.char-preview-box {
  width: 180px;
  height: 220px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.char-preview-box::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 40px;
  background: var(--bg-raised);
  border-radius: 0 0 12px 12px;
}

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

.char-name-row { width: 100%; }

.char-options-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.char-section {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.char-section:last-child { border-bottom: none; }
.char-section .section-label { margin-bottom: 10px; }

.shape-grid {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.shape-btn {
  padding: 8px 14px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  transition: all 0.15s;
}
.shape-btn:hover { color: var(--text-primary); border-color: var(--border-light); }
.shape-btn.active { color: var(--accent-green); border-color: var(--accent-green); background: rgba(57,255,159,0.08); }

.color-rows { display: flex; flex-direction: column; gap: 10px; }
.color-row { display: flex; align-items: center; gap: 10px; }
.color-row > span { min-width: 52px; color: var(--text-secondary); font-size: 12px; }
.color-swatches { display: flex; gap: 5px; align-items: center; flex-wrap: wrap; }

.swatch {
  width: 22px; height: 22px;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color 0.1s, transform 0.1s;
}
.swatch:hover { transform: scale(1.1); }
.swatch.active { border-color: #fff; box-shadow: 0 0 0 1px var(--accent-green); }

.custom-color {
  width: 22px; height: 22px;
  border-radius: 4px;
  border: 2px solid var(--border-light);
  cursor: pointer;
  padding: 0;
  background: none;
}

.acc-grid {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.acc-btn {
  padding: 6px 12px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  transition: all 0.15s;
}
.acc-btn:hover { color: var(--text-primary); border-color: var(--border-light); }
.acc-btn.active { color: var(--accent-blue); border-color: var(--accent-blue); background: rgba(61,139,255,0.1); }

.movement-props { display: flex; flex-direction: column; gap: 2px; }

/* ===== PLAY TAB ===== */
#tab-play {
  display: none;
  flex-direction: column;
  background: #000;
}
#tab-play.active { display: flex; }

.play-layout {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.play-hud {
  height: 36px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  flex-shrink: 0;
}
.hud-item { color: var(--text-secondary); font-size: 11px; }
.hud-sep { color: var(--text-dim); }

.play-canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #000;
}

#playCanvas {
  image-rendering: pixelated;
  max-width: 100%;
  max-height: 100%;
}

/* ===== BROWSE TAB ===== */
.browse-layout {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background: var(--bg-deep);
}

.browse-header {
  padding: 24px 24px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-base);
}

.browse-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 6px;
}

.browse-subtitle {
  font-size: 12px;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.browse-import-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.browse-url-input {
  flex: 1;
  font-size: 12px;
  font-family: monospace;
}

.level-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding: 20px 24px;
}

.level-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}

.level-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.level-card-preview {
  width: 100%;
  height: 120px;
  display: block;
  image-rendering: pixelated;
  background: #0d0d1a;
}

.level-card-body {
  padding: 10px 12px;
}

.level-card-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 3px;
}

.level-card-meta {
  font-size: 11px;
  color: var(--text-dim);
  margin: 0 0 8px;
}

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

/* ===== SHARE TOAST ===== */
.share-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 8px;
  z-index: 9999;
  pointer-events: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  animation: toastIn 0.2s ease;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}