:root{
  --ec-blue:#0060A0;
  --ec-aqua:#68C8F0;

  --bg:#ffffff;
  --surface:#f6f8fa;
  --surface-soft:#eef6ff;

  --border:#d0d7de;
  --text:#0b1220;
  --muted:#475569;

  --good:#0b6b2d;
  --good-bg:#ecfff3;

  --bad:#b42318;
  --bad-bg:#ffefef;

  --radius:16px;
  --shadow:0 1px 2px rgba(0,0,0,0.05);

  --font:"Open Sans", Arial, sans-serif;
}

html[data-contrast="high"]{
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-soft:#ffffff;
  --border:#000000;
  --text:#000000;
  --muted:#111827;
  --good:#000000;
  --bad:#000000;
}

html[data-dyslexia="on"]{
  letter-spacing:0.02em;
  word-spacing:0.08em;
  line-height:1.7;
}

*{ box-sizing:border-box; }

html,body{
  margin:0;
  padding:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
}

.noscript{
  max-width:900px;
  margin:16px auto;
  padding:12px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--surface);
}

.wrap{
  max-width:1100px;
  margin:auto;
  padding:20px;
}

.header{ text-align:center; margin-bottom:18px; }
h1{ margin:6px 0; font-weight:800; }
.subhead{ color:var(--muted); margin-bottom:10px; }
.toolbar{ margin-top:10px; }

.grid{
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:14px;
}
@media (max-width:900px){
  .grid{ grid-template-columns:1fr; }
}

.card{
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:14px;
  background:var(--bg);
  box-shadow:var(--shadow);
}

.h2{ margin:0 0 10px; font-weight:800; }
.h3{ margin:10px 0 8px; font-weight:800; }
.small{ font-size:14px; color:var(--muted); }
.note{ color:var(--muted); }

.row{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}
.row--spread{ justify-content:space-between; }

.field{ display:flex; flex-direction:column; gap:4px; }
.field__label{ font-weight:700; font-size:14px; color:var(--muted); }

.select{
  padding:8px 10px;
  border-radius:10px;
  border:1px solid var(--border);
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
}

.btn{
  border:1px solid var(--border);
  border-radius:12px;
  padding:8px 12px;
  background:var(--surface);
  cursor:pointer;
  font-weight:700;
  color:var(--text);
}
.btn--soft{ background:var(--surface-soft); }
.btn--primary{
  background:rgba(104,200,240,0.35);
  border-color:rgba(0,96,160,0.25);
}
.btn--good{
  background:var(--good-bg);
  border-color:rgba(11,107,45,0.25);
}
.btn:active{ transform:translateY(1px); }

.btn:focus, .select:focus, .slider:focus{
  outline:3px solid rgba(104,200,240,0.7);
  outline-offset:2px;
}

.pill{
  border:1px solid var(--border);
  border-radius:999px;
  padding:6px 12px;
  background:var(--surface);
}
.pill__big{ font-weight:900; font-size:18px; }

.stat{ display:flex; gap:8px; flex-wrap:wrap; }
.stat__item{
  border:1px solid var(--border);
  border-radius:999px;
  padding:6px 10px;
  background:var(--surface);
}
.stat__k{ font-weight:800; margin-right:4px; }
.stat__v{ font-weight:900; }

.divider{ height:1px; background:var(--border); margin:14px 0; }

.sliderWrap{ margin-top:10px; width:100%; }
.slider{ width:100%; }
.sliderTicks{
  display:flex;
  justify-content:space-between;
  font-size:13px;
  color:var(--muted);
}

.callout{
  margin-top:12px;
  border:1px solid rgba(0,96,160,0.25);
  background:var(--surface-soft);
  border-radius:var(--radius);
  padding:10px;
}
.callout__title{ font-weight:900; margin:0 0 6px; }
.callout__list{ margin:0; padding-left:18px; color:var(--muted); }

.outputs{ display:grid; gap:12px; margin-top:12px; }
.outputCard{
  border:1px dashed var(--border);
  border-radius:var(--radius);
  padding:10px;
  background:var(--bg);
}

.shells{ display:flex; flex-wrap:wrap; gap:8px; }
.shell{
  border:1px solid var(--border);
  border-radius:12px;
  padding:8px;
  background:var(--surface);
}

.mono{ font-family:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.spdf{ font-weight:800; font-size:18px; }

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:10px;
}
.legend__item{
  display:flex;
  align-items:center;
  gap:6px;
  border:1px solid var(--border);
  border-radius:999px;
  padding:4px 8px;
  background:var(--surface);
  font-weight:700;
}
.legend__swatch{ width:12px; height:12px; border-radius:3px; }
.legend__s .legend__swatch{ background:#0b5fa5; }
.legend__p .legend__swatch{ background:#2f9bd8; }
.legend__d .legend__swatch{ background:#68c8f0; }
.legend__f .legend__swatch{ background:#7c3aed; }

.orbs{ display:grid; gap:10px; }
.orb-box{
  width:44px;
  height:34px;
  border-radius:12px;
  border:1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:900;
  background:var(--bg);
}

.orbital-badge{ margin:6px 0 8px; }
.badge{
  display:inline-block;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--border);
  background:var(--surface-soft);
  font-weight:800;
  font-size:14px;
}
.badge--tm{
  border-color:rgba(0,96,160,0.35);
  background:rgba(104,200,240,0.25);
}

.energy-bands{
  display:none;
  margin:6px 0 10px;
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  background:var(--surface);
}
.energy-band{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:8px 10px;
  font-size:14px;
  font-weight:800;
}
.energy-band--low{ background:rgba(104,200,240,0.18); }
.energy-band--high{
  background:rgba(0,96,160,0.10);
  border-top:1px dashed rgba(0,0,0,0.15);
}
.energy-pill{
  border:1px solid var(--border);
  border-radius:999px;
  padding:2px 8px;
  background:var(--bg);
  font-weight:900;
}

.jump-wrap{
  position:relative;
  height:22px;
  margin:6px 0 8px;
}
.jump-dot{
  position:absolute;
  top:10px;
  left:10px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--ec-blue);
  opacity:0;
}
html[data-contrast="high"] .jump-dot{ background:#000; }

.footer{ text-align:center; margin-top:12px; }

.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  overflow:hidden;
  clip:rect(1px,1px,1px,1px);
  white-space:nowrap;
}

/* Google Sites embed optimisation */
body{ overflow-x:hidden; }
.wrap{ max-width:100%; margin:0 auto; padding:16px; }
main{ width:100%; }
@media (max-width:1200px){
  .wrap{ padding-left:12px; padding-right:12px; }
}