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

:root {
  --bg: #0a0a14;
  --surface: rgba(18, 18, 30, 0.92);
  --surface-light: rgba(30, 30, 50, 0.8);
  --accent: #e94560;
  --accent-glow: rgba(233, 69, 96, 0.4);
  --text: #e8e8f0;
  --text-dim: #9a9ab0;
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.7);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  font-family: var(--font);
  color: var(--text);
  touch-action: none;
}

#app {
  display: flex;
  width: 100%;
  height: 100%;
  position: relative;
}

#main-layout {
  display: flex;
  flex-direction: column;
  flex: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ==================== TIROIR ==================== */
#drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 340px;
  height: 100%;
  background: var(--surface);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-right: 1px solid var(--border);
  z-index: 50;
  transform: translateX(-105%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

#drawer.open {
  transform: translateX(0);
}

#drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#drawer-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

#drawer-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0,0,0,0.2);
  flex-shrink: 0;
}

#drawer-tabs {
  display: flex;
  gap: 6px;
  flex: 1;
  margin-right: 12px;
}

.tab-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.tab-btn.active {
  background: rgba(255, 255, 255, 0.08);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

#drawer-close {
  background: rgba(255, 255, 255, 0.06);
  border: none;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background var(--transition);
}
#drawer-close:hover {
  background: rgba(255, 255, 255, 0.12);
}

#drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.drawer-pane {
  display: none;
  animation: fadeIn 0.2s ease;
}

.drawer-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==================== CONFIGURATION ==================== */
.setting-group {
  background: rgba(255, 255, 255, 0.02);
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.setting-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 600;
}

.setting-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  margin-bottom: 4px;
}

.setting-row-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin: 8px 0;
  font-size: 0.7rem;
  text-align: center;
  color: var(--text-dim);
  background: rgba(0,0,0,0.2);
  padding: 8px;
  border-radius: 6px;
}

.setting-row input[type="number"] {
  width: 60px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  padding: 4px 6px;
  text-align: center;
  font-size: 0.8rem;
}

.setting-row input[type="range"] {
  flex: 1;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  -webkit-appearance: none;
}
.setting-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ==================== CATÉGORIES & ÉLÉMENTS ==================== */
.cat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.cat-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.7rem;
  cursor: pointer;
  transition: all var(--transition);
}
.cat-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
}

#elements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}

.elem-btn {
  aspect-ratio: 1/1;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  cursor: pointer;
  padding: 4px;
  color: #bbb;
  transition: all var(--transition);
}
.elem-btn:active {
  transform: scale(0.95);
}
.elem-btn.active {
  border-color: white;
  background: rgba(255, 255, 255, 0.12);
  color: white;
  box-shadow: 0 0 20px rgba(255,255,255,0.1);
}
.elem-btn .dot {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  margin-bottom: 4px;
}

.icon-btn-block {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 6px;
  transition: background var(--transition);
}
.icon-btn-block:hover {
  background: rgba(255, 255, 255, 0.08);
}
.icon-btn-block.danger {
  color: #ff6b6b;
}
.icon-btn-block.danger:hover {
  background: rgba(255, 107, 107, 0.1);
}

/* ==================== CANVAS ==================== */
#canvas-wrap {
  flex: 1;
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #0f0f1a;
}

#canvas-wrap canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
  box-sizing: border-box;
  image-rendering: pixelated;
}

#bg { z-index: 1; }
#stage { z-index: 2; }
#glow { pointer-events: none; z-index: 3; mix-blend-mode: screen; }
#ghost { pointer-events: none; z-index: 4; }

/* ==================== OVERLAYS FLOTTANTS ==================== */
#floating-triggers {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  gap: 10px;
  z-index: 35;
}

#tools-toggle, #menu-toggle {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
#tools-toggle:hover, #menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}
#tools-toggle:active, #menu-toggle:active {
  transform: scale(0.95);
}

#tooltip {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 0.75rem;
  z-index: 30;
  pointer-events: none;
  box-shadow: var(--shadow);
  min-width: 140px;
  line-height: 1.5;
  color: var(--text);
}
#tooltip .row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
#tooltip .row b {
  color: white;
}

#stats-bar {
  position: absolute;
  bottom: 12px;
  left: 16px;
  font-size: 0.65rem;
  color: #6cf;
  z-index: 30;
  pointer-events: none;
  background: rgba(0,0,0,0.4);
  padding: 4px 12px;
  border-radius: 6px;
  backdrop-filter: blur(4px);
}

#stats-overlay {
  position: absolute;
  bottom: 50px;
  right: 16px;
  background: var(--surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.7rem;
  z-index: 30;
  line-height: 1.8;
  min-width: 130px;
  box-shadow: var(--shadow);
}

/* ==================== BARRE INFÉRIEURE ==================== */
#bottom-toolbar {
  width: 100%;
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 35;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tool-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

.shape-btns {
  display: flex;
  gap: 2px;
}

.shape-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition);
}
.shape-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.icon-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  min-width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}
.icon-btn:active {
  transform: scale(0.95);
}

.icon-btn.active-mode {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
}
.icon-btn.active-shape {
  background: #2a9df4;
  border-color: #2a9df4;
  box-shadow: 0 0 15px rgba(42, 157, 244, 0.4);
}
.icon-btn.active-explode {
  background: #ff6b6b;
  border-color: #ff6b6b;
  box-shadow: 0 0 15px rgba(255, 107, 107, 0.4);
}
.icon-btn.active-heat {
  background: #e94560;
  border-color: #e94560;
  box-shadow: 0 0 15px rgba(233, 69, 96, 0.4);
}
.icon-btn.active-source {
  background: #9b59b6;
  border-color: #9b59b6;
  box-shadow: 0 0 15px rgba(155, 89, 182, 0.5);
}

.temp-input {
  width: 60px;
  height: 34px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  text-align: center;
  font-size: 0.75rem;
}

.brush-group {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  color: var(--text-dim);
}
.brush-group input[type="range"] {
  width: 70px;
  cursor: pointer;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  outline: none;
}
.brush-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}
.brush-group .val {
  min-width: 18px;
  text-align: center;
  color: white;
}

.active-element {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
}
.active-element span:last-child {
  color: white;
  font-weight: 600;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
  #bottom-toolbar {
    padding: 6px 10px;
    gap: 8px;
  }
  .tool-divider {
    display: none;
  }
  .brush-group input[type="range"] {
    width: 50px;
  }
}

@media (max-width: 768px) {
  #drawer {
    width: 280px;
  }
  #elements-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .active-element {
    display: none;
  }
  #floating-triggers {
    top: 10px;
    left: 10px;
  }
  #tooltip {
    top: 10px;
    right: 10px;
    font-size: 0.65rem;
    padding: 6px 10px;
    min-width: 100px;
  }
  .icon-btn {
    padding: 4px 6px;
    min-width: 28px;
    height: 28px;
    font-size: 0.7rem;
  }
  .shape-btn {
    font-size: 0.6rem;
    padding: 2px 6px;
  }
  .temp-input {
    width: 50px;
    height: 28px;
  }
  .brush-group input[type="range"] {
    width: 40px;
  }
}