:root {
  --bg-color: #030303;
  --text-color: #e0e0e0;
  --sub-text: rgba(224, 224, 224, 0.45);
  --panel-bg: rgba(14, 14, 18, 0.92);
  --border-color: rgba(255, 255, 255, 0.1);
  --accent-blue: #00ff88;
  --accent-purple: #7b2fff;
  --glass-blur: blur(40px);
  --safe-shadow: 0 16px 80px rgba(0, 0, 0, 0.8);
  --node-glow: 0 0 20px rgba(0, 255, 136, 0.3);

  /* Categories */
  --cat-logic: #00d4ff;
  --cat-syntax: #7b2fff;
  --cat-tools: #ffd93d;
  --cat-frontend: #ff3d9a;
  --cat-backend: #00ff88;
  --cat-data: #ff6b35;
}


* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg-color);
  color: var(--text-color);
  font-family: 'JetBrains Mono', 'Fira Code', 'Roboto Mono', monospace, sans-serif;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  user-select: none;
  transition: background-color 0.8s cubic-bezier(0.2, 0, 0, 1);
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
}

#bgCanvas {
  z-index: 0;
}

#graphCanvas {
  z-index: 1;
  cursor: grab;
}

#graphCanvas.panning {
  cursor: grabbing;
}

#ui {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
}

/* HEADER */
.header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 32px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.logo {
  font-family: "Outfit", sans-serif;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, var(--accent-blue), #00d4ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 10px rgba(0, 255, 136, 0.4));
}

.logo-sub {
  font-size: 11px;
  color: var(--sub-text);
  letter-spacing: 0.15em;
  font-weight: 500;
  text-transform: uppercase;
  margin-top: 4px;
}

/* STATS */
.stats {
  display: flex;
  gap: 32px;
  pointer-events: none;
}

.stat-val {
  font-family: "Outfit", sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-color);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.stat-lbl {
  font-size: 10px;
  color: var(--sub-text);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* LEGEND */
.legend {
  position: absolute;
  top: 130px;
  left: 48px;
  pointer-events: none;
}

.legend-title {
  font-size: 10px;
  color: var(--sub-text);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-color);
  opacity: 0.85;
}

.leg-dot {
  width: 12px;
  height: 12px;
  border-radius: 4px; /* More modern than circles */
  flex-shrink: 0;
  box-shadow: 0 0 10px rgba(255,255,255,0.1);
}

/* SEED PANEL (SEARCH PILL) */
.seed-panel {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  width: 620px;
  max-width: calc(100vw - 64px);
  pointer-events: auto;
}

.seed-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 8px 8px 8px 24px;
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--safe-shadow);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.seed-wrap:focus-within {
  transform: translateY(-4px) scale(1.015);
  border-color: var(--accent-blue);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 212, 255, 0.2);
}

.seed-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-color);
  font-family: inherit;
  font-size: 18px;
  font-weight: 400;
}

.seed-input::placeholder {
  color: var(--sub-text);
}

.seed-btn {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  border: none;
  border-radius: 14px;
  padding: 14px 28px;
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.seed-btn:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

#surpriseBtn {
  background: rgba(255,255,255,0.05);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 14px 18px;
}

.chips {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.chip {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 500;
  font-family: monospace;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
  backdrop-filter: var(--glass-blur);
}

.chip:hover {
  transform: translateY(-3px);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.1);
}

/* INFO PANEL */
.info-panel {
  position: absolute;
  top: 50%;
  right: 48px;
  transform: translateY(-50%) translateX(150%);
  width: 380px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 32px;
  padding: 44px;
  backdrop-filter: var(--glass-blur);
  pointer-events: auto;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -20px 0 100px rgba(0, 0, 0, 0.5);
}

.info-panel.open {
  transform: translateY(-50%) translateX(0);
}

.info-cat {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 10px;
}

.info-title {
  font-family: "Outfit", sans-serif;
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.25;
}

.info-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-color);
  opacity: 0.8;
  margin-bottom: 36px;
}

.info-conns-title {
  font-size: 11px;
  color: var(--sub-text);
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.conn-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 500;
}

.conn-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.expand-btn {
  width: 100%;
  margin-top: 28px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  border: none;
  border-radius: 16px;
  padding: 18px;
  color: white;
  font-family: inherit;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.expand-btn:hover {
  transform: scale(1.02) translateY(-2px);
  box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4);
}

.close-btn {
  position: absolute;
  top: 32px;
  right: 32px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* HINT */
.hint {
  position: absolute;
  bottom: 54px;
  left: 54px;
  font-size: 12px;
  color: var(--sub-text);
  line-height: 2;
  font-weight: 600;
}

/* LOADER */
#loader {
  background: #020205;
  z-index: 1000;
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  transition: opacity 1s ease;
}

.load-logo {
  font-family: "Outfit", sans-serif;
  font-size: 56px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: logoGlow 2s ease-in-out infinite;
}

@keyframes logoGlow {
  0%, 100% { filter: drop-shadow(0 0 10px rgba(0,212,255,0.4)); opacity: 1; }
  50% { filter: drop-shadow(0 0 30px rgba(0,212,255,0.7)); opacity: 0.7; }
}

/* AI STATUS */
.ai-status {
  position: absolute;
  bottom: 140px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  padding: 12px 28px;
  border-radius: 100px;
  color: var(--accent-blue);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.1em;
  backdrop-filter: var(--glass-blur);
  display: flex; align-items: center; gap: 10px;
  transition: opacity 0.4s;
}

.ai-status.off { opacity: 0; }

.ai-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-blue);
  animation: dotPulse 1.2s infinite ease-in-out;
}
.ai-dot:nth-child(2) { animation-delay: 0.2s; }
.ai-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotPulse {
  0%, 100% { transform: scale(0.6); opacity: 0.3; }
  50% { transform: scale(1.4); opacity: 1; }
}


/* ONBOARDING */
.onboard-card {
  background: var(--panel-bg); border: 1px solid var(--border-color);
  padding: 80px; border-radius: 48px; width: 600px; text-align: center;
  box-shadow: 0 40px 120px rgba(0,0,0,0.8);
}
/* LEARNED STATE */
.node-learned {
  filter: drop-shadow(0 0 15px #00ff88);
}

.learned-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: #00ff88;
  color: #000;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* FUN RIPPLE */
.ripple {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--accent-blue);
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: rippleEffect 0.8s ease-out;
  opacity: 0;
}

@keyframes rippleEffect {
  0% { width: 0; height: 0; opacity: 0.8; border-width: 4px; }
  100% { width: 300px; height: 300px; opacity: 0; border-width: 1px; }
}

/* CUSTOM SCROLLBAR for a premium look */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--sub-text); }