/* Technocrat calculator — a light, architectural workspace. */
.calc-intro {
    padding: 66px 0 42px;
    background: #f5f6f3;
    position: relative;
    overflow: hidden;
}
.calc-intro::after {
    content: '';
    position: absolute;
    inset: 0 0 0 65%;
    background-image: linear-gradient(#0b2e7606 1px, transparent 1px), linear-gradient(90deg, #0b2e7606 1px, transparent 1px);
    background-size: 38px 38px;
    mask-image: linear-gradient(90deg, transparent, #000);
    pointer-events: none;
}
.calc-intro > .container { position: relative; z-index: 1; }
.calc-intro-top { display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.calc-intro-note { display: flex; align-items: center; gap: 9px; font-size: 15px; color: #54647b; }
.calc-intro-note > span { width: 6px; height: 6px; background: var(--green); border-radius: 50%; }
.calc-intro h1 { font-size: clamp(46px, calc(5.25vw + 4px), 76px); font-weight: 750; line-height: 1.1; letter-spacing: -.06em; margin: 24px 0; }
.calc-intro h1 > span { color: var(--blue); }
.calc-intro-bottom { display: flex; align-items: flex-end; justify-content: space-between; gap: 35px; }
.calc-intro-bottom p { max-width: 590px; color: #59616b; font-size: 19px; line-height: 1.8; }
.calc-intro-link { display: flex; align-items: center; gap: 30px; color: var(--blue); border-bottom: 1px solid #b8c6db; padding-bottom: 8px; font-size: 16px; font-weight: 750; white-space: nowrap; }
.calc-intro-link span { font-size: 27px; }
.calc-tool-section { padding: 22px 0 65px; background: linear-gradient(#f5f6f3 40%, #fff 40%); }
.unit-calculator {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 248px;
    gap: 30px;
    background: white;
    border: 1px solid #dce3eb;
    border-radius: 12px;
    padding: 34px;
    box-shadow: 0 18px 55px #0b2e760b;
    scroll-margin-top: 125px;
    position: relative;
}
.unit-calculator::before { content: ''; position: absolute; top: -1px; left: 34px; width: 75px; height: 4px; background: var(--green); border-radius: 0 0 3px 3px; }
.calc-machine-top { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 25px; padding-bottom: 27px; border-bottom: 1px solid #e5eaf0; }
.calc-machine-top h2 { display: flex; align-items: center; gap: 15px; font-size: 24px; line-height: 1.4; letter-spacing: -.04em; font-weight: 650; }
.calc-machine-top h2 strong { color: var(--blue); font-weight: 800; }
.calc-tool-icon { display: grid; place-items: center; flex-shrink: 0; width: 48px; height: 48px; border: 1px solid #dbe5f4; border-radius: 10px; background: #f0f5fc; color: var(--blue); }
.calc-tool-icon .icon { width: 25px; height: 25px; }
.calc-machine-badge { display: flex; align-items: center; gap: 8px; border: 1px solid #d4e9d8; padding: 7px 12px; border-radius: 30px; background: #f2faf3; color: #286337; font-size: 13px; font-weight: 650; white-space: nowrap; }
.calc-machine-badge > span { width: 5px; height: 5px; border-radius: 50%; background: var(--green); }
.calc-panel-label { font-size: 13px; font-weight: 800; color: #50617b; margin: 0 0 18px; line-height: 1.6; letter-spacing: .04em; }
.calc-categories { background: #f6f8fb; border: 1px solid #e5eaf1; border-radius: 8px; padding: 20px 16px; align-self: start; min-width: 0; }
.calc-category-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.calc-category {
    appearance: none;
    border: 1px solid #dce3ed;
    border-radius: 5px;
    background: #fff;
    min-height: 43px;
    padding: 9px 7px;
    color: #4b5c73;
    font: 650 14px/1.5 var(--font);
    transition: background .2s, color .2s, border-color .2s;
}
.calc-category[data-category='temperature'] { grid-column: 1 / -1; }
.calc-category:hover { border-color: #9bb1d3; background: #edf3fc; color: var(--blue); }
.calc-category.is-active { background: var(--blue); color: #fff; border-color: var(--blue); box-shadow: inset 3px 0 0 var(--green); }
.calc-workspace { min-width: 0; }
.calc-lcd { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.calc-lcd-row { min-width: 0; display: flex; flex-direction: column; justify-content: space-between; min-height: 210px; padding: 23px; background: #fff; border: 1px solid #cad6e7; border-radius: 8px; }
.calc-lcd-description { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.calc-lcd-label { color: #566984; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.calc-lcd-name { font-size: 14px; font-weight: 650; color: #566984; text-align: right; line-height: 1.6; }
.calc-reading { display: flex; align-items: baseline; gap: 9px; width: 100%; min-width: 0; color: var(--blue); margin-top: 35px; }
.calc-reading input { font: 750 clamp(30px, 3.4vw, 48px)/1.3 var(--font); font-variant-numeric: tabular-nums; letter-spacing: -.055em; border: 0; border-bottom: 2px solid #e1e7ef; border-radius: 0; outline: none; background: transparent; width: 100%; min-width: 0; padding: 4px 0; color: var(--blue); text-align: left; transition: border-color .2s; }
.calc-reading input:hover { border-bottom-color: #a7b9d4; }
.calc-reading input:focus { border-bottom-color: var(--green); }
.calc-reading input[aria-invalid='true'] { border-bottom-color: #bd3b2e; color: #a5281c; }
.calc-reading-symbol { font-size: 17px; font-weight: 650; white-space: nowrap; flex-shrink: 0; }
.calc-result-row { background: var(--blue); border-color: var(--blue); position: relative; }
.calc-result-row::before { content: ''; width: 32px; height: 3px; background: var(--green); position: absolute; bottom: -1px; right: 23px; }
.calc-result-row .calc-lcd-label, .calc-result-row .calc-lcd-name { color: #dbe7fb; }
.calc-output { color: #fff; }
.calc-output output { font: 750 clamp(30px, 3.4vw, 48px)/1.4 var(--font); font-variant-numeric: tabular-nums; letter-spacing: -.055em; min-width: 0; overflow-wrap: anywhere; }
.calc-output .calc-reading-symbol { color: #a7edb3; }
.calc-unit-controls { display: grid; grid-template-columns: minmax(0, 1fr) 46px minmax(0, 1fr); align-items: end; gap: 14px; margin-top: 24px; }
.calc-select-field { min-width: 0; }
.calc-select-field > label { font-size: 14px; font-weight: 750; display: block; color: #425575; margin-bottom: 9px; }
.calc-select-wrap { position: relative; }
.calc-select-wrap select { appearance: none; width: 100%; min-height: 54px; padding: 13px 36px 13px 15px; background: #fff; border: 1px solid #cbd6e5; border-radius: 6px; color: #183763; font: 600 16px/1.6 var(--font); cursor: pointer; }
.calc-select-wrap select:hover { border-color: #829dc3; }
.calc-select-wrap select option { background: #fff; color: #17345f; }
.calc-select-wrap > svg { position: absolute; width: 16px; height: 16px; right: 12px; top: 50%; transform: translateY(-50%); color: var(--blue); pointer-events: none; }
.calc-swap { display: grid; place-items: center; width: 46px; height: 54px; border-radius: 6px; background: #edf3fc; border: 1px solid #cbd8ec; color: var(--blue); transition: background .2s, border-color .2s; }
.calc-swap > svg { width: 24px; height: 24px; }
.calc-swap:hover { background: #e3f8e7; border-color: #8dd99d; }
.unit-calculator :is(button, select):focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.calc-feedback { margin-top: 15px; min-height: 48px; }
.calc-feedback p { font-size: 14px; color: #5a6c83; line-height: 1.8; margin: 0; }
.calc-feedback #conversion-error { color: #a02d21; background: #fff3ef; padding: 9px 12px; border-left: 2px solid #c75543; border-radius: 2px; }
.calc-feedback #conversion-error:empty { display: none; }
.calc-feedback:has(#conversion-error:not(:empty)) #calc-input-help { display: none; }
.calc-machine-footer { display: flex; justify-content: space-between; align-items: flex-start; gap: 15px; border-top: 1px solid #e4eaf1; padding-top: 17px; margin-top: 12px; color: #596b84; font-size: 13px; line-height: 1.8; }
.calc-machine-footer > span:first-child { display: flex; align-items: center; gap: 7px; white-space: nowrap; font-weight: 750; color: #254c37; }
.calc-machine-footer > span:last-child { text-align: right; }
.calc-status-dot { background: var(--green); width: 5px; height: 5px; border-radius: 50%; flex-shrink: 0; }
.calc-noscript { color: #a02d21; grid-column: 1 / -1; }
.calc-tool-disclaimer { color: #637187; font-size: 14px; line-height: 1.8; margin: 23px auto 0; max-width: 830px; text-align: center; }
.calc-quick-section { padding: 20px 0 80px; }
.calc-section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 50px; margin-bottom: 32px; }
.calc-section-heading h2, .calc-guidance-copy h2 { font-size: clamp(33px, calc(3.1vw + 4px), 47px); line-height: 1.2; letter-spacing: -.05em; font-weight: 750; }
.calc-section-heading > p { max-width: 380px; color: #59616b; font-size: 17px; line-height: 1.85; }
.calc-quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.calc-quick-card { display: flex; flex-direction: column; text-align: left; border: 1px solid #dce3ec; border-radius: 7px; padding: 25px 22px; background: white; font-family: var(--font); transition: border-color .2s, background .2s, transform .2s; }
.calc-quick-card:hover { background: #f3f8f4; border-color: #9acda5; transform: translateY(-3px); }
.calc-quick-card:focus-visible { outline: 3px solid var(--green); outline-offset: 4px; }
.calc-quick-index { display: flex; align-items: center; justify-content: space-between; gap: 10px; width: 100%; font-size: 13px; font-weight: 750; color: #5c6e88; }
.calc-quick-index > span { display: grid; place-items: center; height: 28px; width: 28px; background: #f0f4fa; border-radius: 50%; font-size: 21px; font-weight: 500; color: var(--blue); }
.calc-quick-card > strong { color: var(--blue); font-size: clamp(20px, calc(1.5vw + 4px), 25px); font-weight: 800; letter-spacing: -.04em; line-height: 1.4; margin-top: 25px; }
.calc-quick-result { color: #256b38; font-size: 16px; font-weight: 650; margin-top: 6px; }
.calc-quick-caption { color: #59697c; font-size: 14px; line-height: 1.8; margin-top: 20px; }
.calc-guidance-section { background: #f5f6f3; padding: 80px 0; }
.calc-guidance-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: 9%; }
.calc-guidance-art { position: relative; min-width: 0; }
.calc-guidance-art::before { content: ''; position: absolute; inset: 0 9%; border-radius: 50%; background: #eaf0f7; }
.calc-guidance-art img { position: relative; width: 100%; height: auto; }
.calc-guidance-copy > p { color: #59616b; font-size: 17px; line-height: 1.85; margin-top: 22px; }
.calc-guidance-copy ol { list-style: none; padding: 0; margin: 28px 0; }
.calc-guidance-copy li { display: flex; gap: 18px; padding: 18px 0; border-top: 1px solid #dce3e2; }
.calc-guidance-copy li > span { display: grid; place-items: center; flex-shrink: 0; width: 32px; height: 32px; border: 1px solid #cdd9d0; background: white; color: var(--blue); font-size: 13px; font-weight: 800; border-radius: 50%; }
.calc-guidance-copy li h3 { font-size: 17px; font-weight: 800; line-height: 1.5; letter-spacing: -.025em; margin-bottom: 6px; }
.calc-guidance-copy li p { font-size: 15px; color: #59616b; line-height: 1.85; }
.calc-guidance-copy .btn { font-size: 15px; }
@media (max-width: 1100px) {
    .unit-calculator { grid-template-columns: minmax(0, 1fr) 218px; padding: 28px; gap: 24px; }
    .calc-categories { padding: 18px 12px; }
    .calc-category { padding-inline: 5px; }
    .calc-lcd-row { padding: 19px; min-height: 205px; }
    .calc-machine-top h2 { font-size: 22px; }
    .calc-machine-badge { font-size: 12px; }
    .calc-machine-footer { flex-direction: column; gap: 6px; }
    .calc-machine-footer > span:last-child { text-align: left; }
    .calc-select-wrap select { font-size: 15px; padding-left: 12px; }
    .calc-quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
    .unit-calculator { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .calc-categories { padding: 18px; }
    .calc-category-grid { grid-template-columns: repeat(7, minmax(0, 1fr)); }
    .calc-category[data-category='temperature'] { grid-column: span 2; }
    .calc-lcd-row { min-height: 190px; padding: 23px; }
    .calc-reading input, .calc-output output { font-size: 42px; }
    .calc-machine-footer { flex-direction: row; gap: 18px; }
    .calc-machine-footer > span:last-child { text-align: right; }
    .calc-intro-note { display: none; }
    .calc-guidance-grid { gap: 6%; }
}
@media (max-width: 680px) {
    .calc-intro { padding: 42px 0 26px; }
    .calc-intro h1 { font-size: clamp(37px, calc(9vw + 4px), 54px); margin: 22px 0; }
    .calc-intro-bottom { display: block; }
    .calc-intro-bottom p { font-size: 18px; }
    .calc-intro-link { margin-top: 23px; width: fit-content; font-size: 15px; gap: 25px; }
    .calc-tool-section { padding: 16px 0 50px; }
    .unit-calculator { padding: 22px; gap: 23px; border-radius: 9px; scroll-margin-top: 100px; }
    .unit-calculator::before { left: 22px; }
    .calc-machine-top { align-items: flex-start; padding-bottom: 22px; }
    .calc-machine-top h2 { font-size: 22px; align-items: flex-start; gap: 12px; }
    .calc-tool-icon { width: 40px; height: 40px; border-radius: 7px; }
    .calc-tool-icon .icon { width: 23px; height: 23px; }
    .calc-machine-badge { display: none; }
    .calc-panel-label { font-size: 13px; margin-bottom: 14px; }
    .calc-categories { padding: 16px; }
    .calc-category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; }
    .calc-category { min-height: 43px; font-size: 14px; padding: 8px 4px; }
    .calc-lcd { gap: 12px; }
    .calc-lcd-row { padding: 18px; min-height: 190px; }
    .calc-lcd-description { flex-direction: column; gap: 8px; }
    .calc-lcd-name { text-align: left; }
    .calc-reading input, .calc-output output { font-size: 34px; }
    .calc-reading-symbol { font-size: 15px; }
    .calc-unit-controls { gap: 9px; grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr); }
    .calc-swap { width: 42px; }
    .calc-select-wrap select { font-size: 16px; padding-left: 12px; }
    .calc-feedback { margin-top: 17px; min-height: 0; }
    .calc-feedback p { font-size: 14px; }
    .calc-machine-footer { flex-direction: column; gap: 6px; margin-top: 18px; }
    .calc-machine-footer > span:last-child { text-align: left; }
    .calc-tool-disclaimer { font-size: 14px; text-align: left; margin-top: 20px; }
    .calc-quick-section { padding: 10px 0 55px; }
    .calc-section-heading { flex-direction: column; align-items: flex-start; gap: 22px; }
    .calc-section-heading h2, .calc-guidance-copy h2 { font-size: 36px; }
    .calc-section-heading > p { font-size: 17px; }
    .calc-quick-grid { gap: 14px; }
    .calc-quick-card { padding: 22px 18px; }
    .calc-quick-card > strong { font-size: 23px; }
    .calc-quick-result { font-size: 16px; }
    .calc-quick-caption { font-size: 15px; }
    .calc-guidance-section { padding: 45px 0 55px; }
    .calc-guidance-grid { grid-template-columns: minmax(0, 1fr); gap: 35px; }
    .calc-guidance-art { width: min(100%, 380px); margin-inline: auto; }
    .calc-guidance-copy > p { font-size: 18px; }
    .calc-guidance-copy li p { font-size: 17px; }
}
@media (max-width: 540px) {
    .calc-category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .calc-lcd { grid-template-columns: minmax(0, 1fr); }
    .calc-lcd-row { min-height: 165px; padding: 21px; }
    .calc-lcd-description { flex-direction: row; }
    .calc-lcd-name { text-align: right; }
    .calc-reading { margin-top: 26px; }
    .calc-reading input, .calc-output output { font-size: 38px; }
    .calc-unit-controls { grid-template-columns: minmax(0, 1fr); gap: 12px; margin-top: 23px; }
    .calc-swap { justify-self: center; height: 42px; width: 46px; }
    .calc-swap > svg { transform: rotate(90deg); }
    .calc-select-wrap select { min-height: 54px; }
    .calc-quick-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 400px) {
    .unit-calculator { padding: 18px; }
    .calc-machine-top h2 { font-size: 21px; }
    .calc-category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .calc-category { font-size: 14px; }
    .calc-reading input, .calc-output output { font-size: 32px; }
    .calc-categories { padding: 14px; }
    .calc-lcd-row { padding: 18px; }
}
@media (max-width: 360px) {
    .calc-category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
    .calc-category, .calc-swap, .calc-quick-card, .calc-reading input { transition: none; }
    .calc-quick-card:hover { transform: none; }
}