* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Inter, Arial, sans-serif;
  background: #ffffff;
  color: #195981;
  overscroll-behavior: none;
}

body {
  overflow: hidden;
}

.page {
  min-height: 100vh;
}

.mindmap-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.mindmap-header h1 {
  margin: 0 0 6px;
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.mindmap-header p {
  margin: 0;
  color: #bcccf5;
  font-size: 0.95rem;
  line-height: 1.5;
}

#mindmap-container {
  position: relative;
  flex: 1;
  overflow: hidden;
  cursor: grab;
  background:
    radial-gradient(circle at 20% 20%, #00d2ff1a, transparent 28%),
    radial-gradient(circle at 82% 30%, #4f77e41a, transparent 25%),
    radial-gradient(circle at 50% 82%, #8f7cff14, transparent 30%),
    linear-gradient(135deg, #02060d, #07111f 45%, #0a1b2f 100%);
}

#mindmap-container.dragging {
  cursor: grabbing;
}

#mindmap {
  display: block;
  width: 100%;
  height: 100%;
}

/* champ d’étoiles */
#mindmap-container::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    radial-gradient(circle, #d33939bf 1px, transparent 1.6px),
    radial-gradient(circle, #b8fff68c 1px, transparent 1.6px),
    radial-gradient(circle, #ffffff52 1px, transparent 1.6px);
  background-size: 140px 140px, 210px 210px, 320px 320px;
  background-position: 12px 24px, 80px 120px, 36px 72px;
}

.mindmap-loading,
.mindmap-error {
  position: absolute;
  left: 22px;
  bottom: 20px;
  z-index: 3;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.92rem;
  color: #ffe3fe;
  background: #100a21b3;
  backdrop-filter: blur(8px);
  border: 1px solid #b4a5ff24;
}

.mindmap-error {
  color: #ffe0e0;
  border-color: #ff78782e;
}

#mindmap-container,
#mindmap {
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}