.calculator-page .site-header { position: relative; background: var(--paper); color: var(--ink); border-bottom: 1px solid var(--line); }
.calculator-page .menu-toggle { border-color: var(--line); }
.calculator-page .nav-calculator { color: var(--blue); }
.calculator-shell { width: min(100%, 1440px); margin: 0 auto; }
.calculator-hero { overflow: hidden; background: var(--ink); color: var(--white); }
.calculator-hero__inner { padding: clamp(76px, 8vw, 116px) var(--page-gutter) clamp(52px, 6vw, 82px); }
.calculator-hero__eyebrow { display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,.65); font-size: 9px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.calculator-mark { width: 28px; height: 1px; background: var(--blue); }
.calculator-hero__title { max-width: 1120px; padding-top: clamp(40px, 5vw, 70px); font-size: clamp(58px, 8.8vw, 122px); }
.calculator-hero__title em { color: #9ba7ff; font-style: normal; }
.calculator-hero__bottom { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-top: clamp(40px, 5.5vw, 72px); padding-top: 18px; border-top: 1px solid rgba(255,255,255,.22); }
.calculator-hero__bottom p { max-width: 670px; margin: 0; color: rgba(255,255,255,.78); font-size: clamp(14px, 1.7vw, 19px); line-height: 1.6; }
.calculator-hero__bottom .calculator-hero__note { max-width: 220px; color: rgba(255,255,255,.55); font-size: 9px; font-weight: 600; letter-spacing: .14em; text-align: end; }
.calculator-workspace { background: var(--paper); }
.calculator-intro { display: grid; grid-template-columns: 1.05fr .95fr; gap: 8vw; align-items: end; padding-bottom: clamp(48px, 7vw, 82px); }
.calculator-workspace__title { padding-top: 36px; font-size: clamp(52px, 7vw, 92px); }
.calculator-workspace__title em { color: #999e9d; font-style: normal; }
.calculator-intro__copy { max-width: 520px; padding-bottom: 5px; }
.calculator-intro__copy .lead { margin: 0 0 15px; }
.calculator-intro__copy > p:last-child { margin: 0; color: #62686a; font-size: 14px; line-height: 1.8; }
.calculator-form { display: grid; gap: 18px; }
.calculator-units { display: flex; justify-content: flex-end; gap: 14px; }
.calculator-unit-field { display: grid; gap: 7px; color: #62686a; font-size: 10px; font-weight: 600; }
.calculator-unit-field select { min-height: 42px; min-width: 170px; padding: 0 12px; border: 1px solid var(--line); border-radius: 0; background: var(--white); color: var(--ink); font: 500 12px var(--body); }
.calculator-card { padding: clamp(22px, 3.5vw, 46px); background: var(--white); border-top: 2px solid var(--blue); box-shadow: 0 18px 55px rgba(17,19,21,.05); }
.calculator-card__header { display: flex; align-items: end; justify-content: space-between; gap: 24px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.calculator-card__eyebrow { margin: 0 0 12px; color: var(--blue); font-size: 9px; font-weight: 700; letter-spacing: .14em; }
.calculator-card__header h3 { margin: 0; font: 500 clamp(25px, 3vw, 36px) var(--display); letter-spacing: -.055em; }
.calculator-card__header > p { max-width: 280px; margin: 0; color: #767c7d; font-size: 11px; line-height: 1.6; text-align: end; }
.carton-list { display: grid; }
.carton-row { padding: 22px 0; border-bottom: 1px solid var(--line); }
.carton-row__heading { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.carton-row__index { color: var(--blue); font-size: 9px; font-weight: 700; letter-spacing: .12em; }
.carton-row__heading strong { font-size: 12px; font-weight: 600; }
.carton-remove { display: inline-grid; width: 32px; height: 32px; margin-inline-start: auto; place-items: center; border: 1px solid var(--line); background: transparent; color: #555b5c; font-size: 20px; line-height: 1; cursor: pointer; }
.carton-remove:hover, .carton-remove:focus-visible { border-color: var(--blue); color: var(--blue); }
.carton-row__fields, .pallet-fields { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.calculator-field { display: grid; min-width: 0; gap: 7px; color: #555b5c; font-size: 10px; font-weight: 600; line-height: 1.4; }
.calculator-field > span:first-child { min-height: 1.4em; }
.calculator-field input { display: block; width: 100%; min-width: 0; min-height: 48px; padding: 0 10px; border: 1px solid rgba(17,19,21,.22); border-radius: 0; background: #fff; color: var(--ink); font: 500 13px var(--body); direction: ltr; text-align: left; }
.calculator-field input:focus, .calculator-unit-field select:focus { outline: 2px solid var(--blue); outline-offset: 2px; }
.calculator-input-unit { display: flex; min-width: 0; align-items: stretch; border: 1px solid rgba(17,19,21,.22); background: #fff; }
.calculator-input-unit input { border: 0; }
.calculator-input-unit small { display: flex; min-width: 31px; align-items: center; justify-content: center; padding: 0 7px; border-inline-start: 1px solid var(--line); color: #74797a; font-size: 9px; font-weight: 500; }
.calculator-add { display: inline-flex; min-height: 46px; align-items: center; gap: 10px; margin-top: 13px; padding: 0; border: 0; background: transparent; color: var(--ink); font: 600 10px var(--body); letter-spacing: .06em; text-transform: uppercase; cursor: pointer; }
.calculator-add > span { display: inline-grid; width: 24px; height: 24px; place-items: center; border: 1px solid var(--blue); color: var(--blue); font-size: 17px; font-weight: 400; }
.calculator-add:hover { color: var(--blue); }
.calculator-pallet { background: #f0f0ed; border-inline-start: 2px solid #a8b4ff; }
.calculator-pallet summary { display: flex; min-height: 58px; align-items: center; justify-content: space-between; gap: 14px; padding: 0 19px; color: var(--ink); font-size: 11px; font-weight: 600; cursor: pointer; list-style-position: inside; }
.calculator-pallet summary::marker { color: var(--blue); }
.calculator-pallet__hint { color: #74797a; font-size: 9px; font-weight: 400; }
.calculator-pallet__body { padding: 0 19px 22px; }
.calculator-pallet__body > p { max-width: 760px; margin: 0 0 16px; color: #6b7172; font-size: 11px; line-height: 1.65; }
.pallet-fields { padding-top: 15px; border-top: 1px solid var(--line); }
.calculator-submit-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-top: 8px; }
.calculator-submit-row > p { max-width: 540px; margin: 0; color: #74797a; font-size: 11px; line-height: 1.6; }
.calculator-submit { display: inline-flex; min-width: 220px; min-height: 52px; align-items: center; justify-content: space-between; gap: 20px; padding: 0 17px; border: 0; background: var(--blue); color: var(--white); font: 700 10px var(--body); letter-spacing: .12em; cursor: pointer; }
.calculator-submit:hover, .calculator-submit:focus-visible { background: #3554d4; }
.calculator-submit:disabled { opacity: .65; cursor: wait; }
.calculator-submit span:last-child { font-size: 15px; }
.calculator-status { min-height: 1.5em; margin: 0; color: #555b5c; font-size: 12px; line-height: 1.6; }
.calculator-status:empty { display: none; }
.calculator-status.is-error { padding: 13px 15px; border-inline-start: 2px solid #a62e2e; background: #fff5f4; color: #872727; }
.calculator-status.is-info { padding: 13px 15px; border-inline-start: 2px solid var(--blue); background: #f4f5fa; }
.calculator-results { margin-top: 42px; padding: clamp(24px, 4vw, 56px); background: var(--white); border-top: 2px solid #9ba7ff; }
.calculator-results[hidden] { display: none; }
.calculator-results__top { display: flex; align-items: end; justify-content: space-between; gap: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.calculator-results__top .display { font-size: clamp(42px, 5.8vw, 74px); }
.calculator-results__top .display em { color: #969b99; font-style: normal; }
.calculator-results__estimate { margin: 0; padding: 8px 11px; border: 1px solid var(--line); color: #6c7273; font-size: 8px; font-weight: 700; letter-spacing: .12em; text-align: center; }
.calculator-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; }
.calculator-summary > div { min-height: 125px; padding: 20px 18px 18px 0; border-bottom: 1px solid var(--line); }
.calculator-summary span { display: block; margin-bottom: 11px; color: #7a7f80; font-size: 9px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.calculator-summary strong { font-size: clamp(22px, 3vw, 34px); font-weight: 500; letter-spacing: -.04em; }
.calculator-summary small { margin-inline-start: 8px; color: #777d7e; font-size: 10px; }
.container-comparison { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; padding-top: 22px; }
.container-result-card { min-width: 0; padding: 22px; border: 1px solid var(--line); border-top: 2px solid var(--blue); background: #fafaf8; }
.container-result-card h3 { margin: 0 0 9px; font: 500 clamp(18px, 2vw, 24px) var(--display); letter-spacing: -.045em; }
.container-result-card__spec { min-height: 2.8em; margin: 0 0 20px; color: #777d7e; font-size: 9px; line-height: 1.6; }
.container-result-card__count { display: block; color: var(--blue); font-size: clamp(36px, 4.4vw, 58px); font-weight: 500; letter-spacing: -.07em; line-height: 1; }
.container-result-card__count-label { display: block; margin: 7px 0 20px; color: #6d7374; font-size: 9px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.container-result-card__metric { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); color: #6b7172; font-size: 10px; line-height: 1.45; }
.container-result-card__metric strong { color: var(--ink); font-size: 11px; text-align: end; }
.container-result-card__warning { min-height: 1.6em; margin: 12px 0 0; color: #8a5a12; font-size: 10px; line-height: 1.55; }
.calculator-results__method { margin: 21px 0 0; color: #74797a; font-size: 11px; line-height: 1.7; }
.calculator-notes { margin-top: 28px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.calculator-notes summary { padding: 17px 0; color: var(--ink); font-size: 11px; font-weight: 600; cursor: pointer; }
.calculator-notes__body { max-width: 940px; padding: 0 0 18px; color: #62686a; font-size: 11px; line-height: 1.75; }
.calculator-notes__body p { margin: 0 0 11px; }
.calculator-notes__body a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.calculator-disclaimer { max-width: 940px; margin: 20px 0 0; color: #7a7f80; font-size: 10px; line-height: 1.7; }
.calculator-contact { padding: clamp(62px, 8vw, 110px) var(--page-gutter); background: #202326; color: var(--white); }
.calculator-contact__inner { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 15px 8vw; }
.calculator-contact__inner > .eyebrow { grid-column: 1 / -1; margin: 0; color: rgba(255,255,255,.57); }
.calculator-contact__inner h2 { font-size: clamp(46px, 6.5vw, 84px); }
.calculator-contact__inner h2 em { color: #858b8b; font-style: normal; }
.calculator-contact__inner > p:not(.eyebrow) { max-width: 420px; margin: 0 0 20px; color: rgba(255,255,255,.72); font-size: 14px; line-height: 1.7; }
.calculator-contact__inner .button { grid-column: 2; justify-self: start; min-height: 48px; }

html[lang="ar"] body { font-family: "Geeza Pro", "Tahoma", "Arial", sans-serif; }
html[lang="zh-Hans"] body { font-family: "PingFang SC", "Microsoft YaHei", "Arial", sans-serif; }
html[lang="th"] body { font-family: "Thonburi", "Leelawadee UI", "Tahoma", sans-serif; }
html[dir="rtl"] .reading-progress span { transform-origin: right; }
html[dir="rtl"] .calculator-results__top, html[dir="rtl"] .calculator-card__header { text-align: right; }
html[dir="rtl"] .calculator-summary > div { padding-right: 0; padding-left: 18px; }
html[dir="rtl"] .calculator-field input { direction: ltr; text-align: left; }

@media (max-width: 1020px) {
  .calculator-intro { grid-template-columns: 1fr 1fr; gap: 5vw; }
  .container-comparison { grid-template-columns: 1fr 1fr; }
  .container-result-card:last-child { grid-column: 1 / -1; }
}
@media (max-width: 820px) {
  .calculator-hero__inner { padding-top: 72px; }
  .calculator-hero__bottom { align-items: flex-start; flex-direction: column; gap: 13px; }
  .calculator-hero__bottom .calculator-hero__note { text-align: start; }
  .calculator-intro { grid-template-columns: 1fr; gap: 24px; }
  .calculator-workspace__title { padding-top: 30px; }
  .calculator-card__header { align-items: flex-start; flex-direction: column; gap: 8px; }
  .calculator-card__header > p { max-width: none; text-align: start; }
  .carton-row__fields, .pallet-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .calculator-field:nth-child(5) { grid-column: 1 / -1; }
  .calculator-submit-row { align-items: stretch; flex-direction: column; gap: 14px; }
  .calculator-submit { width: 100%; }
  .calculator-summary { grid-template-columns: 1fr; }
  .calculator-summary > div { min-height: 96px; padding: 16px 0; }
  .calculator-results__top { align-items: flex-start; flex-direction: column; }
  .calculator-contact__inner { grid-template-columns: 1fr; gap: 17px; }
  .calculator-contact__inner > .eyebrow { grid-column: auto; }
  .calculator-contact__inner > p:not(.eyebrow) { margin-top: 2px; }
  .calculator-contact__inner .button { grid-column: auto; }
}
@media (max-width: 520px) {
  .calculator-hero__title { font-size: clamp(50px, 13vw, 70px); }
  .calculator-workspace__title { font-size: clamp(48px, 12vw, 65px); }
  .calculator-units { justify-content: stretch; }
  .calculator-unit-field { flex: 1; min-width: 0; }
  .calculator-unit-field select { min-width: 0; width: 100%; }
  .carton-row__fields, .pallet-fields { gap: 11px 9px; }
  .calculator-field input { min-height: 45px; padding: 0 8px; }
  .calculator-input-unit small { min-width: 27px; padding: 0 5px; }
  .calculator-pallet summary { align-items: flex-start; flex-direction: column; justify-content: center; gap: 4px; padding: 12px 15px; }
  .calculator-pallet__body { padding-right: 15px; padding-left: 15px; }
  .container-comparison { grid-template-columns: 1fr; }
  .container-result-card:last-child { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  .calculator-page *, .calculator-page *::before, .calculator-page *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}