:root {
  --electric-blue: #1d4ed8;
  --lime-green: #22c55e;
  --dark-graphite: #0b1220;
  --surface-dark: #111a2d;
  --surface-dark-soft: #1a253d;
  --text-dark: #e5edf8;
  --text-dark-muted: #a6b6cd;
  --surface-light: #eef4ff;
  --surface-light-soft: #ffffff;
  --text-light: #0f172a;
  --text-light-muted: #42526b;
  --danger: #ef4444;
  --orange: #f59e0b;
  --radius: 16px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 800px at 30% -20%, #2563eb26, transparent), var(--dark-graphite);
  color: var(--text-dark);
}
#tool-container {
  --bg: var(--dark-graphite);
  --surface: #111b2e;
  --surface-2: #182540;
  --text: var(--text-dark);
  --muted: var(--text-dark-muted);
  --border: #ffffff17;
  min-height: 100vh;
  padding: 14px;
}
#tool-container.theme-light {
  --bg: #f6f9ff;
  --surface: #ffffff;
  --surface-2: #edf3ff;
  --text: var(--text-light);
  --muted: var(--text-light-muted);
  --border: #0f172a1f;
  background: linear-gradient(160deg, #eef4ff, #f8fbff);
}
.top-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: linear-gradient(145deg, #1b2a4a, #13203a);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}
#tool-container.theme-light .chip-btn { background: linear-gradient(145deg, #fff, #edf3ff); }
.secondary-btn { opacity: .9; }
.app {
  display: grid;
  grid-template-columns: 320px 1fr 320px;
  gap: 14px;
}
.sidebar, .card {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  box-shadow: 0 14px 34px rgba(5, 10, 20, .25);
}
.sidebar { padding: 16px; }
.left, .right { max-height: calc(100vh - 90px); overflow: auto; }
.left, .right {
  scrollbar-width: thin;
  scrollbar-color: #3b82f6 #0f172a33;
}
.left::-webkit-scrollbar, .right::-webkit-scrollbar { width: 12px; }
.left::-webkit-scrollbar-track, .right::-webkit-scrollbar-track {
  background: #0f172a33;
  border-radius: 999px;
}
.left::-webkit-scrollbar-thumb, .right::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #60a5fa, #1d4ed8);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
.center {
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
h1, h2, h3 { margin: 0 0 8px; color: var(--text); }
.sub { color: var(--muted); margin: 0 0 6px; }
.physicsBadge {
  display: inline-block;
  border: 1px solid #3b82f64f;
  background: #3b82f622;
  color: #93c5fd;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
}
label {
  display: block;
  margin-top: 10px;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
}
input[type="number"], select {
  width: 100%;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
input[type="number"]:focus, select:focus, button:focus, input[type="range"]:focus { outline: 2px solid #3b82f6; outline-offset: 1px; }
.rangeLabel {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 13px;
  color: var(--text);
}
.rangeLabel strong { color: var(--lime-green); font-variant-numeric: tabular-nums; }
input[type="range"] {
  width: 100%;
  margin: 6px 0;
  accent-color: var(--electric-blue);
}
button {
  border: 0;
  border-radius: 11px;
  padding: 11px 14px;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(145deg, #1d4ed8, #2563eb);
  transition: transform .2s ease, box-shadow .2s ease;
}
button:hover { transform: translateY(-1px); box-shadow: 0 10px 22px #00000033; }
.orange { background: linear-gradient(145deg, #f59e0b, #f97316); }
.red { background: linear-gradient(145deg, #ef4444, #dc2626); }
.gray { background: linear-gradient(145deg, #64748b, #475569); }
.blue { background: linear-gradient(145deg, #2563eb, #0ea5e9); }
.btn-grid { display: grid; gap: 8px; margin-top: 12px; }
.btn-grid.small { grid-template-columns: 1fr; }
.hero-grid { display: grid; grid-template-columns: 340px 1fr; gap: 12px; margin-top: 14px; }
.score-card { padding: 14px; }
.score-ring-wrap { position: relative; width: 220px; margin: 0 auto; }
.score-ring { width: 220px; height: 220px; transform: rotate(-90deg); }
.ring-track { fill: none; stroke: #94a3b826; stroke-width: 14; }
.ring-progress {
  fill: none;
  stroke: var(--lime-green);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 603;
  stroke-dashoffset: 603;
  transition: stroke-dashoffset .35s ease, stroke .3s ease;
}
.score-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
#scoreValue { font-size: 58px; font-weight: 800; line-height: 1; }
#statusText { color: var(--muted); font-weight: 600; }
.pulse-meter, .battery-meter { margin-top: 10px; }
.pulse-track, .battery-shell {
  margin-top: 6px;
  height: 14px;
  background: #0f172a4f;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}
#pulseBar, #batteryFill {
  height: 100%;
  width: 0;
  transition: width .28s ease, background-color .28s ease;
}
#pulseBar {
  background: linear-gradient(90deg, #ef4444, #f59e0b, #0ea5e9, #22c55e);
  animation: pulseFlow 1.4s linear infinite;
}
#batteryFill { background: linear-gradient(90deg, #0ea5e9, #22c55e); }
@keyframes pulseFlow {
  0% { filter: brightness(.9); }
  50% { filter: brightness(1.16); }
  100% { filter: brightness(.9); }
}
.stats-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.stat-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
}
.stat-item .k { color: var(--muted); font-size: 12px; }
.stat-item .v { font-size: 20px; font-weight: 800; margin-top: 2px; }
.charts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.chart-card { padding: 12px; min-height: 260px; }
.chart-card {
  height: 320px;
  min-height: 320px;
  max-height: 320px;
  overflow: hidden;
}
.chart-card canvas {
  width: 100% !important;
  height: 250px !important;
  max-height: 250px !important;
  display: block;
}
.insights { margin-top: 12px; padding: 14px; }
#tipsBox { color: var(--text); line-height: 1.55; }
.actions-row { margin-top: 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
#savedScores { display: grid; gap: 8px; }
.saved-item {
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 10px;
  padding: 10px;
}
.saved-item .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}
.saved-item .actions { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.saved-item button { padding: 8px 10px; font-size: 12px; }
.saved-item .actions button { flex: 1; }
.alert-good { color: #4ade80; }
.alert-warn { color: #facc15; }
.alert-bad { color: #f87171; }
.shake { animation: shake .25s linear 2; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}
.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}
.tool-extra-actions { margin: 20px 0; display: flex; gap: 8px; flex-wrap: wrap; }
.tool-toggle-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 14px;
}
.popup-overlay, .legal-popup-overlay {
  position: fixed;
  inset: 0;
  display: none;
  justify-content: center;
  align-items: center;
  padding: 20px;
  background: #0000009d;
  z-index: 99999;
}
.legal-popup-overlay { display: flex; }
.popup-overlay.active, .legal-popup-overlay.active { display: flex; }
.popup-box, .legal-popup-box {
  background: #fff;
  color: #111827;
  border-radius: 16px;
  max-width: 720px;
  width: 100%;
  max-height: calc(100vh - 40px);
  overflow: auto;
  padding: 20px;
  position: relative;
}
.popup-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  padding: 0;
}
textarea { width: 100%; min-height: 160px; border-radius: 10px; padding: 12px; }
.copy-btn { margin-top: 8px; }
.fullscreen-active {
  position: fixed !important;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  border-radius: 0;
  overflow: auto;
  padding: 10px;
}
#tool-container:fullscreen {
  width: 100vw;
  height: 100vh;
  max-width: 100vw;
  max-height: 100vh;
  border-radius: 0;
  padding: 10px;
}
@media (max-width: 1360px) {
  .app { grid-template-columns: 1fr; }
  .left, .right { max-height: none; }
  .center { order: 1; }
  .left { order: 2; }
  .right { order: 3; }
  .hero-grid { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .chart-card {
    height: 300px;
    min-height: 300px;
    max-height: 300px;
  }
  .chart-card canvas {
    height: 230px !important;
    max-height: 230px !important;
  }
}
@media (max-width: 680px) {
  #tool-container { padding: 8px; }
  .top-actions { gap: 6px; }
  .chip-btn { padding: 8px 10px; font-size: 12px; }
  #scoreValue { font-size: 48px; }
  .stats-grid { grid-template-columns: 1fr; }
  .actions-row { grid-template-columns: 1fr; }
  .chart-card {
    height: 280px;
    min-height: 280px;
    max-height: 280px;
  }
  .chart-card canvas {
    height: 210px !important;
    max-height: 210px !important;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

#tool-container.theme-light {
  color: #0f172a;
}
#tool-container.theme-light .sidebar,
#tool-container.theme-light .center,
#tool-container.theme-light .card {
  background: #ffffffea;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.09);
}
#tool-container.theme-light .sub,
#tool-container.theme-light #statusText,
#tool-container.theme-light .stat-item .k {
  color: #334155;
}
#tool-container.theme-light .stat-item .v,
#tool-container.theme-light h1,
#tool-container.theme-light h2,
#tool-container.theme-light h3,
#tool-container.theme-light label,
#tool-container.theme-light #tipsBox {
  color: #0f172a;
}
#tool-container.theme-light .physicsBadge {
  background: #dbeafe;
  color: #1e3a8a;
  border-color: #93c5fd;
}
#tool-container.theme-light .pulse-track,
#tool-container.theme-light .battery-shell {
  background: #dbe4f4;
}
#tool-container.theme-light input[type="number"],
#tool-container.theme-light select {
  background: #f8fbff;
  color: #0f172a;
  border-color: #cbd5e1;
}
#tool-container.theme-light .saved-item {
  background: #f8fbff;
}
#tool-container.theme-light .alert-warn { color: #a16207; }
#tool-container.theme-light .alert-bad { color: #b91c1c; }
#tool-container.theme-light .left,
#tool-container.theme-light .right {
  scrollbar-color: #2563eb #dbeafe;
}
#tool-container.theme-light .left::-webkit-scrollbar-track,
#tool-container.theme-light .right::-webkit-scrollbar-track {
  background: #dbeafe;
}