* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: #f5f7f5;
  color: #17352d;
  font-family: system-ui, sans-serif;
  line-height: 1.65;
}
.iv-main {
  max-width: 1040px;
  margin: auto;
  padding: 36px 20px 70px;
}
.iv-main h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.12;
  max-width: 800px;
}
.iv-main h2 {
  line-height: 1.25;
}
.iv-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  font-weight: 700;
}
.iv-card {
  background: #fff;
  padding: clamp(18px, 3vw, 32px);
  border: 1px solid #cad7cf;
  border-radius: 18px;
  margin: 24px 0;
}
.iv-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.iv-main label {
  display: block;
  font-weight: 650;
}
.iv-main input,
.iv-main select {
  display: block;
  width: 100%;
  min-width: 0;
  margin: 6px 0;
  padding: 12px;
  border: 1px solid #718b80;
  border-radius: 8px;
  background: white;
  color: #17352d;
  font: inherit;
  font-size: 16px;
}
.iv-main small {
  display: block;
  color: #455e53;
}
.iv-main button,
.iv-link {
  display: inline-block;
  padding: 12px 18px;
  background: #164d3c;
  color: #fff;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  margin: 15px 0;
}
.iv-main button:disabled {
  opacity: 0.65;
  cursor: wait;
}
.iv-main a:not(.iv-link) {
  color: #125d46;
  text-underline-offset: 3px;
}
.iv-main :focus-visible,
.iv-skip:focus {
  outline: 3px solid #aa5300;
  outline-offset: 4px;
}
.iv-skip {
  position: absolute;
  left: 12px;
  top: -100px;
  background: white;
  padding: 12px;
  z-index: 1000;
}
.iv-skip:focus {
  top: 12px;
}
.iv-main [hidden] {
  display: none !important;
}
.iv-error {
  color: #a02020;
  font-weight: 600;
}
.iv-result {
  font-size: 1.35rem;
  font-weight: 650;
}
.iv-table {
  overflow: auto;
  max-width: 100%;
}
.iv-main table {
  border-collapse: collapse;
  width: 100%;
  font-variant-numeric: tabular-nums;
}
.iv-main td,
.iv-main th {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #cbd8d0;
}
.iv-main td:not(:first-child) {
  white-space: nowrap;
}
.iv-main th {
  background: #eaf1ec;
}
#result-title {
  scroll-margin-top: 110px;
}
.iv-main footer {
  margin-top: 36px;
}
@media (max-width: 620px) {
  .iv-grid {
    grid-template-columns: 1fr;
  }
  .iv-main {
    padding: 24px 14px 48px;
  }
}
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}