:root {
  --brand: #293a9b;
  --brand-dark: #202f83;
  --brand-soft: #f5f8ff;
  --ink: #0d2442;
  --muted: #607393;
  --line: #d8e5f7;
  font-family: Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 0;
  padding: 16px;
  color: var(--ink);
  background: #fff;
  overflow-x: hidden;
}

.calculator {
  width: min(100%, 940px);
  margin: 0 auto;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 36px rgba(13, 36, 66, .07);
}

.calculator__header { margin-bottom: 22px; }
h1 { margin: 0; font-size: clamp(26px, 4vw, 36px); line-height: 1.08; letter-spacing: -.025em; }
.calculator__header p { margin: 8px 0 0; color: var(--muted); line-height: 1.45; }
.calculator__grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr); gap: 20px; align-items: stretch; }
.controls { display: grid; gap: 14px; }
.control { padding: 16px 18px 14px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.control__heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 8px; }
label { font-weight: 700; }
output { color: var(--brand-dark); font-size: 18px; font-weight: 800; white-space: nowrap; }

input[type="range"] {
  width: 100%;
  height: 8px;
  margin: 7px 0;
  border-radius: 999px;
  outline: none;
  background: linear-gradient(to right, var(--brand) 0 var(--progress), #dfe7f3 var(--progress) 100%);
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  width: 24px;
  height: 24px;
  border: 4px solid #fff;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 2px 8px rgba(41, 58, 155, .32);
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 4px solid #fff;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 2px 8px rgba(41, 58, 155, .32);
  cursor: pointer;
}

input[type="range"]:focus-visible { outline: 3px solid rgba(41, 58, 155, .2); outline-offset: 5px; }
.range-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }
.results { display: flex; flex-direction: column; justify-content: center; min-width: 0; padding: 26px; border: 1px solid #cbdcf3; border-radius: 16px; background: var(--brand-soft); text-align: center; }
.result { color: var(--muted); }
.result strong { color: var(--ink); white-space: nowrap; }
.result--primary { display: flex; flex-direction: column; gap: 7px; }
.result--primary strong { color: var(--brand-dark); font-size: clamp(29px, 4vw, 42px); line-height: 1; }
.result-details { display: grid; grid-template-columns: 1fr 1fr; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
.result-details .result { display: flex; flex-direction: column; gap: 5px; min-width: 0; padding: 0 12px; }
.result-details .result + .result { border-left: 1px solid var(--line); }
.result-details strong { font-size: 16px; }
.disclaimer { margin: 20px 0 0; color: var(--muted); font-size: 11px; line-height: 1.45; }

@media (max-width: 700px) {
  body { padding: 0; }
  .calculator { width: 100%; padding: 22px 18px 20px; border: 0; border-radius: 0; box-shadow: none; }
  .calculator__header { margin-bottom: 20px; }
  h1 { font-size: clamp(27px, 8vw, 34px); }
  .calculator__header p { margin-top: 7px; font-size: 15px; }
  .calculator__grid { grid-template-columns: 1fr; gap: 16px; }
  .controls { gap: 12px; }
  .control { padding: 14px 15px 12px; }
  .control__heading { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; margin-bottom: 7px; }
  label { font-size: 15px; }
  output { font-size: 17px; }
  input[type="range"] { height: 9px; margin: 11px 0; }
  input[type="range"]::-webkit-slider-thumb { width: 28px; height: 28px; }
  input[type="range"]::-moz-range-thumb { width: 20px; height: 20px; }
  .results { padding: 22px 18px 18px; border-radius: 15px; }
  .result strong { white-space: normal; }
  .result--primary strong { font-size: clamp(27px, 9vw, 34px); }
  .disclaimer { margin-top: 18px; }
}

@media (max-width: 350px) {
  .calculator { padding-inline: 16px; }
  .control__heading { grid-template-columns: 1fr; gap: 4px; }
  .result-details { grid-template-columns: 1fr; gap: 12px; }
  .result-details .result { padding: 0; }
  .result-details .result + .result { padding-top: 12px; border-top: 1px solid var(--line); border-left: 0; }
}