:root{
  --bg: #f7fbf2;
  --card: rgba(255,255,255,.86);
  --card2: rgba(255,255,255,.96);
  --border: rgba(17,24,39,.10);
  --text: rgba(17,24,39,.92);
  --muted: rgba(17,24,39,.66);
  --muted2: rgba(17,24,39,.52);
  --good: #059669;   /* emerald */
  --bad: #dc2626;    /* red */
  --accent: #16a34a; /* green */
  --gold: #f59e0b;   /* amber */
  --shadow: 0 18px 50px rgba(15,23,42,.14);
  --radius: 18px;
}

*{ box-sizing: border-box; }

html, body{
  height: 100%;
}

body{
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 650px at 20% 10%, rgba(22,163,74,.18), transparent 58%),
    radial-gradient(800px 520px at 85% 18%, rgba(245,158,11,.18), transparent 60%),
    radial-gradient(900px 700px at 60% 95%, rgba(16,185,129,.14), transparent 62%),
    var(--bg);
}

.page{
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 18px 28px;
}

.header{
  margin-bottom: 18px;
}

.badge{
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: rgba(22,163,74,.10);
  border-radius: 999px;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: .2px;
  color: var(--muted);
}

h1{
  margin: 12px 0 8px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.subhead{
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  max-width: 70ch;
}

.subheadInCard{
  margin: 0 0 12px;
}

.explainTop{
  margin-top: 12px;
  max-width: 78ch;
  color: var(--muted);
  line-height: 1.55;
  background: rgba(255,255,255,.55);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 14px;
}

.explainTop p{
  margin: 0;
}

.explainTop p + p{
  margin-top: 10px;
}

.explainTop code{
  color: rgba(17,24,39,.92);
  background: rgba(5,150,105,.10);
  border: 1px solid rgba(5,150,105,.18);
  padding: 2px 6px;
  border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: .95em;
}

.card{
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.card + .card{
  margin-top: 14px;
}

.form .grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.field{
  display: grid;
  gap: 7px;
}

.label{
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
}

input{
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid rgba(17,24,39,.14);
  background: rgba(255,255,255,.82);
  color: var(--text);
  outline: none;
  transition: border-color .15s ease, transform .05s ease, background .15s ease;
}

input::placeholder{ color: rgba(17,24,39,.35); }

input:focus{
  border-color: rgba(22,163,74,.55);
  background: rgba(255,255,255,.96);
  box-shadow: 0 0 0 4px rgba(22,163,74,.14);
}

.hint{
  font-size: 12px;
  color: var(--muted2);
  line-height: 1.35;
}

.prefix{
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  border-radius: 12px;
  border: 1px solid rgba(17,24,39,.14);
  background: rgba(255,255,255,.82);
  overflow: hidden;
}

.prefixSymbol{
  display: grid;
  place-items: center;
  color: rgba(17,24,39,.55);
  font-weight: 700;
  border-right: 1px solid rgba(17,24,39,.10);
  height: 100%;
}

.prefix input{
  border: none;
  border-radius: 0;
  background: transparent;
  padding-left: 10px;
}

.prefix:focus-within{
  border-color: rgba(22,163,74,.55);
  background: rgba(255,255,255,.96);
  box-shadow: 0 0 0 4px rgba(22,163,74,.14);
}


button{
  appearance: none;
  border: 1px solid rgba(17,24,39,.14);
  border-radius: 12px;
  padding: 11px 14px;
  font-weight: 700;
  color: var(--text);
  background: rgba(255,255,255,.78);
  cursor: pointer;
  transition: transform .06s ease, background .15s ease, border-color .15s ease;
}

button:active{
  transform: translateY(1px);
}

.primary{
  border-color: rgba(22,163,74,.35);
  color: rgba(255,255,255,.96);
  background: linear-gradient(180deg, rgba(22,163,74,.96), rgba(5,150,105,.92));
}

.primary:hover{
  border-color: rgba(22,163,74,.55);
  background: linear-gradient(180deg, rgba(22,163,74,1), rgba(5,150,105,.96));
}

.secondary:hover{
  border-color: rgba(17,24,39,.22);
  background: rgba(245,158,11,.12);
}

.result{
  position: relative;
  overflow: hidden;
}

.result::before{
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(700px 260px at 20% -20%, rgba(245,158,11,.20), transparent 60%);
  pointer-events: none;
}

.errors{
  position: relative;
  border: 1px solid rgba(220,38,38,.30);
  background: rgba(220,38,38,.08);
  color: rgba(17,24,39,.92);
  padding: 12px 12px;
  border-radius: 14px;
  line-height: 1.45;
}

.errors ul{
  margin: 0;
  padding-left: 18px;
}

.errors li{
  margin: 4px 0;
}

.empty{
  position: relative;
  color: var(--muted);
  padding: 10px 2px;
}

.resultTop{
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.resultTitle{
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.resultTicker{
  font-weight: 800;
  color: rgba(17,24,39,.88);
  border: 1px solid rgba(17,24,39,.14);
  background: rgba(245,158,11,.14);
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 12px;
}

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

@media (max-width: 760px){
  .resultGrid{
    grid-template-columns: 1fr;
  }
}

.kpi{
  border: 1px solid rgba(17,24,39,.10);
  background: rgba(255,255,255,.72);
  border-radius: 16px;
  padding: 14px 14px;
}

.kpiLabel{
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: .2px;
  text-transform: uppercase;
}

.kpiValue{
  margin-top: 8px;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.kpiHint{
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted2);
}

.footer{
  margin-top: 16px;
  color: rgba(17,24,39,.45);
  font-size: 12px;
}