:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --danger: #f97316;
  font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.08), transparent 45%), var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 1.5rem;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.title-block {
  flex: 2;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.4);
}

.title-block h1 {
  margin: 0 0 0.5rem;
  font-size: 1.8rem;
}

.highlight-panels {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.panel {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 1rem;
  padding: 1rem;
  min-height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 600;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.control-group,
.control-inline {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 1rem;
  padding: 1rem;
}

.control-group label,
.control-inline label,
.criteria-header span {
  font-size: 0.9rem;
  color: var(--muted);
  display: block;
  margin-bottom: 0.4rem;
}

.control-inline label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.slider-wrapper {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

#yearSlider {
  flex: 1;
  min-width: 0;
}

.control-hint {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}

button,
select,
input[type="text"],
input[type="range"] {
  width: 100%;
  font: inherit;
  border-radius: 0.6rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  padding: 0.4rem 0.6rem;
}

.slider-wrapper button {
  width: auto;
  padding: 0.35rem 0.6rem;
}

#playToggle {
  width: auto;
  flex: 0 0 auto;
}

button {
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

button:hover,
button:focus-visible {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--accent);
}

.criteria-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.35rem;
}

.criteria-grid label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
}

main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.view {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 1.2rem;
  padding: 1rem;
  box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.1);
}

.view-header h2 {
  margin: 0;
}

.view-header p {
  margin: 0.3rem 0 1rem;
  color: var(--muted);
}

.view-body {
  position: relative;
}

svg {
  width: 100%;
  height: 380px;
}

#sunburst {
  height: 420px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.85rem;
  margin-top: 0.6rem;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.legend i {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 0.2rem;
}

.tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 0.8rem;
  padding: 0.8rem 1rem;
  font-size: 0.85rem;
  max-width: 280px;
  line-height: 1.4;
  box-shadow: 0 12px 30px rgba(2, 6, 23, 0.7);
  z-index: 999;
}

.tooltip h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.tooltip ul {
  padding-left: 1rem;
  margin: 0.4rem 0 0;
}

.tooltip li {
  margin-bottom: 0.2rem;
}

.danger-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--danger);
}

.site-point {
  fill-opacity: 0.85;
  stroke: rgba(15, 23, 42, 0.8);
  stroke-width: 0.8px;
  transition: transform 0.2s ease, fill-opacity 0.2s ease, stroke-width 0.2s ease;
}

.site-point.danger {
  stroke: var(--danger);
  stroke-width: 1.5px;
}

.site-point.brushed {
  fill-opacity: 1;
  stroke-width: 2px;
}

.site-point.dimmed {
  opacity: 0.25;
}

.timeline-area path {
  fill-opacity: 0.85;
}

.timeline-area path.dimmed {
  opacity: 0.2;
}

.timeline-bars rect {
  transition: opacity 0.2s ease;
}

.timeline-bars rect.brushed {
  opacity: 1 !important;
  stroke: var(--accent);
  stroke-width: 1;
}

.danger-line {
  fill: none;
  stroke-width: 2px;
  stroke-linejoin: round;
  stroke-linecap: round;
  opacity: 0.9;
}

#sunburst path {
  cursor: pointer;
  stroke: none;
  stroke-width: 0;
}


#sunburst path.selected {
  stroke: none;
  stroke-width: 0;
}

#sunburst .sunburst-label {
  font-size: 0.72rem;
  fill: rgba(226, 232, 240, 0.92);
  pointer-events: none;
}

#sunburst .sunburst-center {
  fill: rgba(15, 23, 42, 0.65);
  stroke: rgba(148, 163, 184, 0.35);
  stroke-width: 1px;
  cursor: pointer;
}

#sunburst .sunburst-center:hover {
  fill: rgba(56, 189, 248, 0.14);
}

#sunburst .sunburst-center.active {
  stroke: var(--accent);
}

.axis text {
  fill: var(--muted);
  font-size: 0.75rem;
}

.axis line,
.axis path {
  stroke: rgba(148, 163, 184, 0.4);
}

footer {
  margin-top: 2rem;
  text-align: center;
  color: var(--muted);
}

footer a {
  color: var(--accent);
}

@media (max-width: 768px) {
  body {
    padding: 1rem;
  }
  svg {
    height: 300px;
  }
  #sunburst {
    height: 340px;
  }
}


/* --- Sunburst hover tooltip (labels are hidden by default) --- */
.sb-tooltip{
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(2, 6, 23, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.25);
  color: rgba(226, 232, 240, 0.95);
  font-size: 12px;
  line-height: 1.25;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.35);
}

.sb-tooltip .t-title{
  font-weight: 600;
  margin-bottom: 2px;
}

.sb-tooltip .t-sub{
  opacity: 0.85;
}


/* Sunburst level control */
.sunburst-level-control{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:10px;
  flex-wrap:wrap;
}
.sunburst-level-control label{
  font-size:0.9rem;
  opacity:0.9;
}
.sunburst-level-control input[type="range"]{
  width:160px;
}
.sunburst-level-control span{
  min-width:18px;
  text-align:right;
  font-variant-numeric: tabular-nums;
  opacity:0.9;
}