:root{
  --bg:#0b0d12;
  --card:#121622;
  --text:#e8eefc;
  --muted:#a9b4cc;
  --border:#1f2740;
  --brand:#7dd3fc;
  --accent:#34d399;
  --danger:#fb7185;
  --shadow: 0 10px 25px rgba(0,0,0,.35);
  --radius: 16px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(125,211,252,.10), transparent 60%),
              radial-gradient(900px 500px at 80% 20%, rgba(52,211,153,.10), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.45;
}

a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width: 980px; margin: 0 auto; padding: 18px}
.site-header{
  position: sticky; top:0; z-index:10;
  backdrop-filter: blur(10px);
  background: rgba(11,13,18,.75);
  border-bottom:1px solid var(--border);
}
.header-row{display:flex; align-items:center; justify-content:space-between; gap:16px}
.brand{font-weight:800; letter-spacing:.2px}
.nav{display:flex; flex-wrap:wrap; gap:10px}
.nav a{color:var(--muted); font-weight:600; font-size: 13px}
.nav a:hover{color:var(--text)}

.site-footer{border-top:1px solid var(--border); margin-top: 26px; padding: 14px 0; background: rgba(11,13,18,.4)}
.muted{color:var(--muted)}
.tiny{font-size: 12px}

.hero{padding: 10px 0 6px 0}
.hero h1{font-size: clamp(26px, 3.2vw, 40px); margin: 8px 0 6px 0}
.lead{font-size: 16px; color: var(--muted); margin: 6px 0 0 0}

.card{
  margin-top: 14px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.field label{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  font-weight:700;
  font-size: 14px;
}
.field input, .field select{
  margin-top: 6px;
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  outline: none;
}
.field input:focus, .field select:focus{border-color: rgba(125,211,252,.6)}
.row{display:flex; align-items:center; gap: 10px}
.row input{flex:1}

.actions{display:flex; flex-direction:column; gap: 10px}

.btn{
  border:1px solid var(--border);
  background: rgba(255,255,255,.05);
  color: var(--text);
  padding: 11px 12px;
  border-radius: 14px;
  font-weight:800;
  cursor:pointer;
}
.btn:hover{border-color: rgba(125,211,252,.5)}
.btn.primary{
  background: linear-gradient(90deg, rgba(125,211,252,.20), rgba(52,211,153,.18));
  border-color: rgba(125,211,252,.35);
}
.pill{
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 999px;
  font-weight:800;
  cursor:pointer;
  font-size: 13px;
}
.pill:hover{color: var(--text); border-color: rgba(52,211,153,.5)}
.preset-row{display:flex; gap: 8px; margin-top: 8px; flex-wrap:wrap}

.q{
  width: 26px; height: 26px; border-radius: 999px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  cursor:pointer;
  font-weight: 900;
  line-height: 1;
}
.q:hover{color:var(--text); border-color: rgba(125,211,252,.5)}

.result{
  font-size: 18px;
  font-weight: 900;
  margin-top: 8px;
}
.chart-wrap{margin-top: 14px}
.chart-head h3{margin: 0 0 4px 0}
.chart{width:100%; overflow:hidden; border-radius: 14px; border:1px solid var(--border); background: rgba(0,0,0,.18)}
.chart svg{display:block; width:100%; height:auto}

.sensitivity{margin-top: 14px}
.share input{min-width: 0}
.link-list{padding-left: 18px}
.faq-item{margin-top: 14px}
.faq-item h2{font-size: 18px; margin: 0 0 6px 0}
.ai-snippets .snippet{
  padding: 10px 12px;
  border-radius: 14px;
  border:1px dashed rgba(125,211,252,.35);
  background: rgba(125,211,252,.06);
  margin: 10px 0;
}

@media (min-width: 860px){
  .grid{grid-template-columns: 1fr 1fr}
  .actions{grid-column: span 2; flex-direction:row; align-items:center}
  .actions .btn{min-width: 200px}
}


/* Tooltip bubble */
/* Tooltip bubble */
.tip-bubble{
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(125,211,252,.06);
  border: 1px solid rgba(125,211,252,.35);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  color: rgba(232,238,252,.92);
  font-size: 12px;
  max-width: 520px;
}