.calc { max-width: 1440px; padding-top: 130px; padding-bottom: 80px; }
.calc-hero { max-width: 1040px; margin-bottom: 48px; }
.calc h1 { font-size: clamp(32px, 5.1vw, 70px); line-height: 1.06; margin: 24px 0; }
.calc-lede { max-width: 770px; font-size: clamp(17px, 2vw, 21px); }
.calc-private, .calc-hint { color: var(--muted); font-size: 14px; line-height: 1.6; }
.calc-private { border-left: 3px solid var(--amber); padding-left: 16px; }
.calc-step { border-top: 1px solid var(--line); padding: 32px 0; }
.calc h2 { font-size: clamp(25px, 3vw, 38px); line-height: 1.15; margin: 8px 0 18px; }
.calc h3 { font-size: 20px; line-height: 1.25; }
.calc-section-head, .calc-channel-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.calc-controls { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 24px 0; max-width: 800px; }
.calc label { display: flex; flex-direction: column; gap: 8px; font-size: 14px; font-weight: 600; min-width: 0; }
.calc input, .calc select { font: inherit; font-weight: 400; color: var(--ink); background: var(--bg); border: 1px solid var(--line-2); border-radius: 0; min-height: 46px; padding: 10px 12px; width: 100%; min-width: 0; }
.calc select { appearance: none; padding-right: 34px; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.calc input[aria-invalid="true"] { border-color: #9a382d; }
.calc button, .calc summary { cursor: pointer; }
.calc :focus-visible { outline: 3px solid var(--ink-2); outline-offset: 3px; }
.calc-button { min-height: 44px; padding: 10px 16px; border: 1px solid var(--ink); background: var(--ink); color: var(--bg); font: 600 14px var(--ff); }
.calc-button:hover { background: var(--ink-2); }
.calc-button:disabled { opacity: .5; cursor: default; }
.calc-button-quiet { background: transparent; color: var(--ink); border-color: var(--line-2); }
.calc-button-quiet:hover { background: var(--bg-2); }
.calc-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0; }
.calc-channels, .calc-result-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.calc-channel { margin: 0; padding: 22px; border: 1px solid var(--line-2); min-width: 0; }
.calc-channel legend { font: 12px var(--mono); padding: 0 6px; }
.calc-channel-head { margin-bottom: 20px; align-items: end; }
.calc-channel-head label { flex: 1; }
.calc-channel-name { flex: 1; min-width: 0; display: grid; gap: 12px; }
.calc-remove { flex-shrink: 0; }
.calc-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.calc-fields .calc-full { grid-column: 1 / -1; }
.calc-error { color: #9a382d; font-size: 14px; margin: 12px 0 0; min-height: 0; }
.calc-error:empty { display: none; }
.calc-conclusion { background: var(--ink); color: var(--bg); padding: 26px; margin: 8px 0 24px; }
.calc-conclusion h3 { color: var(--bg); font-size: clamp(22px, 2.6vw, 32px); }
.calc-conclusion p { margin-bottom: 0; }
.calc-result { background: var(--bg-2); border: 1px solid var(--line); padding: 24px; min-width: 0; }
.calc-result h3 { margin-bottom: 18px; overflow-wrap: anywhere; }
.calc-price { font-size: clamp(27px, 3vw, 38px); line-height: 1.1; font-weight: 800; display: block; margin: 10px 0; }
.calc-bar { height: 5px; background: var(--line); margin: 18px 0; }
.calc-bar span { display: block; background: var(--ink-2); height: 100%; }
.calc-best { border-top: 4px solid var(--amber); }
.calc-best .calc-bar span { background: var(--amber-d); }
.calc-result dl { margin: 0; }
.calc-result dl > div { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line-2); padding: 10px 0; font-size: 14px; }
.calc-result dt { max-width: 65%; }
.calc-result dd { margin: 0; text-align: right; font-weight: 600; }
.calc-result-note { font-size: 14px; line-height: 1.6; margin-bottom: 0; }
.calc-status { font-weight: 700; border-left: 3px solid var(--ink); padding-left: 12px; }
.calc-method-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin: 26px 0; }
.calc-method-grid p, .calc-method details { font-size: 15px; }
.calc summary { font-weight: 700; min-height: 44px; padding: 12px 0; }
.calc-formulas dt { font-weight: 700; margin-top: 16px; }
.calc-formulas dd { margin: 4px 0 0; }
.calc-method details a { text-decoration: underline; text-underline-offset: 3px; }
.calc-next { border-top: 1px solid var(--line); margin-top: 32px; padding-top: 16px; }
.calc-next a { display: inline-block; margin: 0 28px 12px 0; font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }
@media (max-width: 760px) {
  .calc { padding-top: 110px; }
  .calc-channels, .calc-result-grid, .calc-method-grid { grid-template-columns: minmax(0, 1fr); }
  .calc-section-head { align-items: start; flex-direction: column; }
  .calc-channel, .calc-result, .calc-conclusion { padding: 18px; }
}
@media (max-width: 430px) {
  .calc-controls, .calc-fields { grid-template-columns: minmax(0, 1fr); }
  .calc-channel-head { flex-direction: column; align-items: stretch; }
  .calc-remove { align-self: flex-end; }
  .calc-result dl > div { flex-direction: column; gap: 4px; }
  .calc-result dt { max-width: 100%; }
  .calc-result dd { text-align: left; }
}
@media print {
  .nv, .menu, .ft, #calculator, .calc-method, .calc-private, #export { display: none !important; }
  .calc { padding: 0; }
  .calc-hero { margin-bottom: 20px; }
  .calc h1 { font-size: 30px; }
  .calc-conclusion { background: none; color: var(--ink); border: 1px solid var(--ink); }
  .calc-conclusion h3 { color: var(--ink); }
  .calc-result { break-inside: avoid; }
}