@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&family=Inter:wght@400;500&display=swap');

:root {
  --bg-gradient: linear-gradient(135deg, #090B10 0%, #151928 100%);
  --panel-bg: rgba(20, 24, 39, 0.6);
  --panel-border: rgba(255, 255, 255, 0.1);
  --text-main: #FFFFFF;
  --text-muted: #A0AABF;
  --accent-color: #00E5FF; /* Cyan */
  --accent-glow: rgba(0, 229, 255, 0.3);
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
}

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

body {
  margin: 0;
  overflow: hidden;
  background: var(--bg-gradient);
  font-family: var(--font-body);
  color: var(--text-main);
  height: 100vh;
  width: 100vw;
}

#graph-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1; /* Lowest z-index */
}

/* Glassmorphism overlays */
#ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none; /* Let clicks pass through to graph */
  z-index: 10;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 40px;
}

/* Header */
header {
  pointer-events: auto; /* Re-enable pointer events for the UI elements */
  display: inline-block;
}

.title-container {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 24px 32px;
  max-width: 500px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  margin-bottom: 20px;
}

/* Mode Toggles */
.mode-toggles {
  display: flex;
  gap: 12px;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 30px;
  padding: 6px;
  width: fit-content;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 24px;
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
}

.toggle-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.toggle-btn.active {
  background: var(--accent-color);
  color: #000;
  font-weight: 600;
  box-shadow: 0 0 15px var(--accent-glow);
}

h1 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.5rem;
  letter-spacing: -0.5px;
  background: linear-gradient(90deg, #FFFFFF, var(--accent-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

p.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.5;
  font-weight: 300;
}

/* Info Panel for Node Details */
#info-panel {
  pointer-events: auto;
  align-self: flex-end;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 32px;
  width: 400px;
  min-height: 200px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 20px var(--accent-glow);
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#info-panel.visible {
  transform: translateX(0);
}

#node-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.8rem;
  color: var(--accent-color);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 12px;
}

#node-desc {
  font-size: 1rem;
  line-height: 1.6;
  color: #E2E8F0;
}

.instruction-toast {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  padding: 12px 24px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  color: var(--text-muted);
  pointer-events: auto;
  letter-spacing: 0.5px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

/* Custom generic graph tooltip styling overrides since 3d-force-graph uses an injected div */
.scene-tooltip {
  font-family: var(--font-body);
  background-color: rgba(10, 15, 26, 0.9) !important;
  border: 1px solid var(--accent-color) !important;
  border-radius: 8px !important;
  padding: 8px 16px !important;
  color: white !important;
  font-size: 14px !important;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5) !important;
  pointer-events: none;
}