:root {
  /* Colors */
  --bg-color: #f8fafc;
  --text-color: #0f172a;
  --muted-text: #64748b;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;

  /* Phase Colors */
  --phase-pre: 173, 58%, 39%; /* Teal */
  --phase-a: 221, 83%, 53%;   /* Blue */
  --phase-b: 43, 96%, 64%;    /* Yellow/Gold */
  --phase-bc: 25, 95%, 53%;   /* Orange */
  --phase-c: 12, 76%, 61%;    /* Coral */
  --phase-d: 339, 90%, 60%;   /* Pink/Magenta */
  --phase-e: 142, 71%, 45%;   /* Green */

  --font-sans: 'Inter', sans-serif;
  --font-serif: 'Merriweather', serif;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow: hidden; /* Single page view */
  width: 100vw;
  height: 100vh;
}

/* Background Texture */
.bg-texture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('./assets/bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
  pointer-events: none;
  z-index: 0;
  mix-blend-mode: multiply;
}

/* Header */
header {
  position: absolute;
  top: 20px;
  left: 30px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  transition: opacity 0.5s ease, transform 0.5s ease;
  animation: slideIn 0.8s ease-out;
}

header h1 {
  margin: 0 0 5px 0;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-color);
}

header p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted-text);
  line-height: 1.4;
}

/* Main Map Container */
#map-container {
  width: 100%;
  max-width: 1000px;
  height: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 10;
  padding: 2rem;
  box-sizing: border-box;
}

#journey-svg {
  width: 100%;
  height: 100%;
  max-width: 1400px;
  max-height: 700px;
  /* border: 1px solid red; debug */
  overflow: visible;
  filter: drop-shadow(0 10px 15px rgba(0, 0, 0, 0.1));
}

.path-line {
  fill: none;
  stroke: #cbd5e1;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 10, 10;
  opacity: 0.5;
}

/* Node Styles */
.node-group {
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform-box: fill-box;
  transform-origin: center;
}

.node-group:hover {
  transform: scale(1.1);
}

.node-hit-area {
  fill: transparent;
}

.node-circle {
  fill: var(--card-bg);
  stroke-width: 4px;
  transition: all 0.3s ease;
}

.node-group:hover .node-circle {
  stroke-width: 6px;
  r: 16px; /* Slightly larger on hover */
}

.node-inner {
  transition: fill 0.3s ease;
}

.node-label {
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  fill: var(--text-color);
  opacity: 0.7;
  pointer-events: none;
  transition: opacity 0.3s ease;
  text-anchor: middle;
}

.node-group:hover .node-label {
  opacity: 0;
}

/* Tooltip (Hover State) */
.tooltip-group {
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 20;
}

.node-group:hover .tooltip-group {
  opacity: 1;
}

.tooltip-bg {
  fill: var(--card-bg);
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
  rx: 8;
}

.tooltip-text-phase {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  fill: currentColor; /* Inherits from group color */
  opacity: 0.8;
  text-anchor: middle;
}

.tooltip-text-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  fill: var(--text-color);
  text-anchor: middle;
}

/* Module Label */
.module-label-group {
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}

.module-label-bg {
  fill: rgba(255, 255, 255, 0.9);
  stroke: var(--border-color);
  stroke-width: 1;
  rx: 15;
}

.module-label-text {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  fill: var(--text-color);
  text-anchor: middle;
  dominant-baseline: middle;
}

/* Footer Legend */
.legend {
  position: absolute;
  bottom: 30px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 1rem;
  z-index: 50;
  pointer-events: none;
  flex-wrap: wrap;
  padding: 0 20px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  pointer-events: auto;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--card-bg);
  width: 90%;
  max-width: 600px;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  transform: scale(0.95) translateY(10px);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--muted-text);
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--text-color);
}

.modal-header {
  margin-bottom: 1.5rem;
}

.modal-phase-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: #f1f5f9;
  color: var(--muted-text);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-color); /* Will be overridden by phase color via JS */
}

.modal-content {
  overflow-y: auto;
  flex: 1;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--muted-text);
  padding-right: 0.5rem;
}

/* Animations */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes drawPath {
  to { stroke-dashoffset: 0; }
}

/* Scrollbar for modal */
.modal-content::-webkit-scrollbar {
  width: 6px;
}
.modal-content::-webkit-scrollbar-track {
  background: transparent;
}
.modal-content::-webkit-scrollbar-thumb {
  background-color: #cbd5e1;
  border-radius: 3px;
}