:root {
  --bg-color: #f4eee6;       /* Crème chaleureux */
  --accent-color: #a05a2c;   /* Caramel / Bois clair */
  --border-color: #4a3623;   /* Noyer */
  --text-color: #3e2723;     /* Marron foncé */
  --paper-color: #fffcf7;    /* Blanc cassé */
  --canvas-shadow: 0 15px 45px rgba(70, 28, 0, 0.22);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Georgia', 'Times New Roman', serif;
  background-color: var(--bg-color);
  background-image: radial-gradient(circle at center, #fffcf7 0%, #ece5da 100%);
  color: var(--text-color);
  height: 100vh;
  overflow: hidden;
}

.atelier-wrapper {
  display: flex;
  height: 100%;
}

/* Sidebar façon Menuiserie */
.panel {
  width: 300px;
  background: #ffffff;
  border-right: 2px solid var(--border-color);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: 10px 0 30px rgba(0,0,0,0.02);
  z-index: 5;
}

header h1 {
  font-size: 2rem;
  margin: 0;
  font-weight: normal;
  color: var(--border-color);
}

header h1 span { color: var(--accent-color); font-style: italic; }

header p {
  font-size: 0.85rem;
  margin: 5px 0 2rem;
  opacity: 0.7;
}

.tool-case {
  flex-grow: 1;
}

.control-item {
  margin-bottom: 2rem;
}

label {
  display: block;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 1px;
  font-weight: bold;
  margin-bottom: 10px;
  color: var(--accent-color);
}

/* Color Picker Custom */
.ink-well {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 3px solid var(--border-color);
  overflow: hidden;
  background: white;
}

#colorPicker {
  width: 150%;
  height: 150%;
  transform: translate(-15%, -15%);
  cursor: pointer;
  border: none;
}

.thickness-gauge {
  font-size: 2.5rem;
  color: var(--border-color);
}

.thickness-gauge small { font-size: 1rem; }

/* Boutons */
.btn {
  width: 100%;
  padding: 12px;
  font-family: 'Georgia', serif;
  font-size: 0.9rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 10px;
}

.btn-draw {
  background: var(--border-color);
  color: white;
  border: none;
}

.btn-draw:hover {
  background: var(--accent-color);
}

.btn-clear {
  background: transparent;
  border: 1px solid #d7ccc8;
  color: var(--text-color);
}

/* Zone de dessin */
.drawing-zone {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.canvas-frame {
  background: #ffffff;
  padding: 10px;
  border: 6px solid var(--border-color);
  box-shadow: var(--canvas-shadow);
  border-radius: 2px;
}

canvas {
  display: block;
  background-color: var(--paper-color);
  image-rendering: pixelated;
  cursor: crosshair;
}

.manual {
  font-size: 0.8rem;
  border-top: 1px solid #eee;
  padding-top: 1rem;
}

.manual span {
  background: var(--bg-color);
  padding: 2px 5px;
  border-radius: 3px;
  font-weight: bold;
}