:root {
  /* NEW PALETTE: "Blueprint" */
  --color-background-start: #1C243B; /* Deep Navy */
  --color-background-end: #0F131F;   /* Near Black-Blue */
  --color-text: #D0D0E0;
  --color-accent-1: #4D9DE0;         /* Technical Blue */
  --color-accent-2: #FFFF00;         /* Yellow | #E15554; Soft Red/Orange Accent */ 
  --color-node-bg: #111522cc;        /* Translucent node bg */
  --color-border: #4D9DE088;
  --color-border-hover: #E15554;
  --color-line: #4D9DE033;           /* Faint dotted lines */
  
  --font-main: 'IBM Plex Mono', monospace;
  --transition-speed: 0.8s;
}

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(ellipse at center, var(--color-background-start) 0%, var(--color-background-end) 70%);
  background-attachment: fixed;
  color: var(--color-text);
  font-family: var(--font-main);
  overflow: hidden;
}

#map-container {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
}



/* SVG lines container */
#connection-lines {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  transform-origin: center center;
  transition: transform var(--transition-speed) ease-in-out;
  z-index: 0;
}
#connection-lines line {
  stroke: var(--color-line);
  stroke-width: 2px;
  stroke-dasharray: 4 2; /* Dotted line */
  transition: all 0.3s;
}
#connection-lines line.active {
  stroke: var(--color-accent-1);
  opacity: 0.5;
}


#world {
  position: relative;
  width: 100%;
  height: 100%;
  transform: scale(1) translate(0px, 0px);
  transform-origin: center center;
  transition: transform var(--transition-speed) ease-in-out;
}

/* --- Node Styling --- */
.node, .sub-node {
  position: absolute;
  background: var(--color-node-bg);
  backdrop-filter: blur(5px);
  padding: 1.5rem;
  transition: all var(--transition-speed), transform 0.2s ease-out;
  cursor: pointer;
  left: 50%;
  top: 50%;
  transform: translate(calc(-50% + var(--x, 0px)), calc(-50% + var(--y, 0px)));
  border: 2px solid var(--color-border);
  z-index: 1;
}

.node {
  min-width: 200px;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  text-align: center;
}
.sub-node {
  min-width: 250px; /* Wider for chapter titles */
  border-radius: 8px;
  text-align: center;
  /* Sub-nodes are hidden by default */
  display: none;
  opacity: 0;
}

.node:hover, .sub-node:hover {
  transform: translate(calc(-50% + var(--x, 0px)), calc(-50% + var(--y, 0px))) scale(1.05);
  border-color: var(--color-border-hover);
}

.node-title, .sub-node-title {
  margin: 0;
  color: var(--color-accent-1);
  transition: all var(--transition-speed);
}

.sub-node-container {
  position: relative;
  margin: 1rem 0 0 0;
  padding: 0;
  width: 100%;
}

/* --- Content Visibility (Handled by JS) --- */
.node-content, .sub-node-content {
  display: none;
  opacity: 0;
  transition: opacity 0.5s ease-in-out 0.5s;
  margin-top: 1rem;
  max-height: 70vh;
  overflow-y: auto;
  text-align: left;
}
.sub-node .sub-node-title {
  text-align: center;
}

.node.active > .node-title,
.sub-node.active > .sub-node-title {
  text-align: left;
  transform: translateY(-10px);
}

.node.active, .sub-node.active {
  cursor: default;
  border-radius: 12px;
  align-items: flex-start;
  padding: 2rem;
  z-index: 10;
  border-color: var(--color-accent-1);
  transform: translate(calc(-50% + var(--x, 0px)), calc(-50% + var(--y, 0px))) scale(1);
}

/* This is when content is shown */
.node.active .node-content,
.sub-node.active .sub-node-content {
  display: block;
  opacity: 1;
}
/* This is when a parent node is zoomed */
.node.zoomed .sub-node-container {
  display: block;
}
.node.zoomed .sub-node {
  display: block;
  opacity: 1;
}

/* When a node is zoomed, hide its content */
.node.zoomed .node-content {
  display: none;
}
/* When a sub-node is active, hide parent's content */
.sub-node.active .node-content {
   display: none;
}


/* Hide other nodes when one is active */
body.zoomed-in .node:not(.active):not(.zoomed),
body.zoomed-in .sub-node:not(.active) {
  opacity: 0.1;
  pointer-events: none;
}

/* --- UI Elements --- */
#zoom-out-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--color-accent-1);
  color: var(--color-background-end);
  border: none;
  padding: 0.8rem 1.2rem;
  font-family: var(--font-main);
  font-weight: bold;
  cursor: pointer;
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.5s;
  z-index: 100;
}
#zoom-out-btn:hover {
  background: var(--color-accent-2);
  color: var(--color-text);
}

body.zoomed-in #zoom-out-btn {
  opacity: 1;
  visibility: visible;
}

/* --- Content Styling --- */
pre {
  background: #000;
  padding: 1rem;
  border-radius: 4px;
  color: var(--color-accent-1);
}
h3 {
  color: var(--color-accent-2);
  font-weight: 700;
}

/* --- Modal Styling --- */
#content-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1000;
}

#modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

#modal-content-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-node-bg);
  backdrop-filter: blur(10px);
  border: 2px solid var(--color-accent-1);
  border-radius: 12px;
  padding: 2rem;
  max-width: 80vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

#modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--color-accent-2);
  color: var(--color-text);
  border: none;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.3s;
  font-family: var(--font-main);
  font-weight: bold;
}

#modal-close-btn:hover {
  background: var(--color-accent-1);
  transform: rotate(90deg);
}

#modal-content {
  color: var(--color-text);
  font-family: var(--font-main);
  line-height: 1.6;
}

#modal-content h2 {
  color: var(--color-accent-1);
  margin-top: 0;
}

#modal-content h3 {
  color: var(--color-accent-2);
}

#modal-content p {
  margin: 1rem 0;
}

/* --- Link Button Styling --- */
#modal-content .urza-link {
  display: block;
  padding: 0.8rem 1rem;
  margin-top: 1.5rem;
  background: var(--color-accent-1);
  color: var(--color-background-end);
  text-decoration: none;
  border-radius: 4px;
  text-align: center;
  font-weight: bold;
  transition: all 0.3s ease;
}

#modal-content .urza-link:hover {
  background: var(--color-accent-2);
  color: black ; /* var(--color-text) */
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

#modal-content a {
  color: var(--color-accent-1);
  text-decoration: underline;
}

#modal-content a:hover {
  color: var(--color-accent-2);
}

#modal-content hr {
    border: 0;
    border-top: 1px solid var(--color-line);
    margin: 1.5rem 0;
}