@font-face {
  font-family: "PerformFont";
  src: url("fonts/PerformFont5-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "PerformFont";
  src: url("fonts/PerformFont5-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "PerformFont";
  src: url("fonts/PerformFont5-ExtraBold.ttf") format("truetype");
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f8f8f7;
  --surface: #fff;
  --ink: #080808;
  --muted: #626262;
  --line: rgba(8, 8, 8, .12);
  --brand: #ff4b0b;
  --brand-dark: #e43c00;
  --night: #11100f;
  --container: 1420px;
  --font: "PerformFont", "Arial Narrow", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
a { color: inherit; }
.container { width: min(var(--container), calc(100% - 80px)); margin: 0 auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 300; top: 12px; left: 12px; padding: 10px 16px; transform: translateY(-160%); background: var(--brand); color: #fff; border-radius: 8px; }
.skip-link:focus { transform: none; }

.nav { height: 72px; position: fixed; inset: 0 0 auto; z-index: 100; background: rgba(250,248,244,.84); border-bottom: 1px solid rgba(23,25,31,.08); backdrop-filter: saturate(160%) blur(18px); box-shadow: 0 8px 24px -22px rgba(23,25,31,.35); }
.nav-inner { width: min(1200px, calc(100% - 56px)); height: 100%; margin: auto; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; margin-right: 11px; border-radius: 9px; background: linear-gradient(145deg, #ff824f, #ff5a1f); color: #fff; font-weight: 800; box-shadow: 0 8px 18px -10px rgba(255,75,11,.8); }
.brand-name { font-size: 19px; font-weight: 600; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 28px; margin-left: auto; }
.nav-links a { position: relative; text-decoration: none; color: #626872; font-size: 14.5px; font-weight: 500; transition: color .25s ease; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 100%; height: 1.5px; background: #ff6b35; transform: scaleX(0); transform-origin: left; transition: transform .3s ease; }
.nav-links a:hover { color: #181a20; }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta { padding: 10px 20px; border-radius: 11px; color: #fff; background: linear-gradient(180deg, #ff8049, #ff6b35); text-decoration: none; font-size: 14px; font-weight: 600; box-shadow: 0 8px 20px -8px rgba(255,107,53,.5); transition: transform .25s ease, box-shadow .25s ease; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 26px -8px rgba(255,107,53,.55); }

.hero { min-height: 100svh; position: relative; display: flex; align-items: center; padding: 124px 0 66px; overflow: hidden; background: #fbfbfa; }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle at 17% 88%, rgba(255,75,11,.12), transparent 26%), radial-gradient(circle at 79% 30%, rgba(255,255,255,.98), transparent 30%); }
.hero-glow { position: absolute; width: 420px; height: 420px; right: 9%; bottom: -32%; border-radius: 50%; background: rgba(255,75,11,.12); filter: blur(80px); animation: drift 8s ease-in-out infinite alternate; }
.hero-grid { position: relative; min-width: 0; display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(48px, 7vw, 110px); align-items: center; }
.hero-grid > * { min-width: 0; }
.hero-copy { min-width: 0; align-self: stretch; display: flex; flex-direction: column; justify-content: center; animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
.breadcrumbs { margin: 0 0 38px; display: flex; gap: 8px; font-size: 12px; color: var(--muted); }
.breadcrumbs a { text-decoration: none; }
.eyebrow { margin: 0; display: flex; align-items: center; gap: 9px; color: var(--brand-dark); text-transform: uppercase; letter-spacing: .16em; font-size: 11px; font-weight: 800; }
.eyebrow > span { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }
.hero h1 { max-width: 100%; margin: 13px 0 22px; font-size: clamp(76px, 6.3vw, 96px); line-height: .78; font-weight: 800; letter-spacing: -.072em; text-transform: uppercase; }
.hero h1 em { color: var(--brand); font-style: normal; }
.hero-lead { margin: 0; font-size: clamp(22px, 2vw, 31px); line-height: 1.25; color: #3d3d3d; }
.hero-more { width: max-content; margin-top: 30px; color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 600; }
.hero-more span { margin-left: 10px; color: var(--brand); }

.calculator-card { width: 100%; min-width: 0; position: relative; padding: clamp(34px, 4vw, 58px); border: 1px solid rgba(255,255,255,.85); border-radius: 30px; background: rgba(255,255,255,.9); box-shadow: 0 25px 75px rgba(0,0,0,.085), inset 0 0 0 1px rgba(0,0,0,.025); backdrop-filter: blur(20px); animation: rise .75s .1s cubic-bezier(.2,.7,.2,1) both; }
.card-head { min-height: 38px; display: flex; align-items: center; justify-content: flex-end; gap: 20px; }
.card-head > p { margin: 0; font-size: 14px; color: var(--muted); }
.unit-switch { display: flex; padding: 4px; background: #f1f1ef; border-radius: 10px; }
.unit-btn { min-width: 43px; padding: 7px 9px; border: 0; border-radius: 7px; background: transparent; color: #747474; cursor: pointer; font-weight: 600; }
.unit-btn.is-active { color: var(--ink); background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,.1); }
.form-grid { min-width: 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
.form-grid-primary { margin-top: 22px; gap: 30px; }
.form-grid-primary .field small:not(.error) { display: none; }
.field { min-width: 0; display: flex; flex-direction: column; gap: 9px; text-transform: uppercase; font-size: 17px; font-weight: 600; }
.input-wrap { width: 100%; min-width: 0; max-width: 100%; min-height: 124px; display: flex; align-items: center; border: 1px solid var(--line); border-radius: 12px; background: #fff; overflow: hidden; transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
.input-wrap:focus-within { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(255,75,11,.1); transform: translateY(-2px); }
.input-wrap input { width: 100%; min-width: 0; padding: 18px 8px 13px 22px; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: clamp(42px, 4.1vw, 64px); line-height: .9; font-weight: 800; font-variant-numeric: tabular-nums; }
.input-wrap input[type="number"] { appearance: textfield; -moz-appearance: textfield; }
.input-wrap input[type="number"]::-webkit-inner-spin-button,
.input-wrap input[type="number"]::-webkit-outer-spin-button { margin: 0; -webkit-appearance: none; }
.input-wrap b { padding: 16px 20px 0 6px; color: #696969; font-size: 21px; white-space: nowrap; }
.field small { min-height: 0; color: #8b8b8b; text-transform: none; font-size: 10px; font-weight: 400; }
.field small.error { color: #a72f1a; }
.field.is-invalid .input-wrap { border-color: #c43a21; }
.optional { font-style: normal; font-size: 10px; color: #888; }
select { width: 100%; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink); }
.field-wide { grid-column: 1 / -1; }

.advanced-options { margin-top: 12px; border-top: 1px solid var(--line); }
.advanced-options > summary { padding: 16px 0 13px; display: flex; justify-content: space-between; gap: 20px; list-style: none; color: #393939; cursor: pointer; font-size: 12px; font-weight: 600; }
.advanced-options > summary::-webkit-details-marker { display: none; }
.advanced-options > summary::after { content: "+"; color: var(--brand); font-size: 18px; line-height: .7; }
.advanced-options[open] > summary::after { content: "−"; }
.advanced-options > summary span { margin-left: auto; color: #909090; font-weight: 400; }
.advanced-options .form-grid { padding: 6px 0 18px; }
.advanced-options .input-wrap { min-height: 54px; }
.advanced-options .input-wrap input { font-size: 22px; padding: 12px; }
.advanced-options .input-wrap b { padding-top: 0; font-size: 11px; }
.advanced-options .field { font-size: 12px; }
.form-message { min-height: 14px; margin-top: 3px; color: #a72f1a; font-size: 11px; }
.calculate-btn { width: 100%; min-height: 88px; position: relative; margin-top: 8px; padding: 20px 31px; display: flex; align-items: center; justify-content: center; gap: 20px; border: 0; border-radius: 11px; color: #fff; background: var(--brand); cursor: pointer; text-transform: uppercase; font-size: 28px; font-weight: 800; box-shadow: 0 16px 35px rgba(255,75,11,.22); transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.calculate-btn b { position: absolute; right: 33px; font-size: 42px; font-weight: 400; transition: transform .2s ease; }
.calculate-btn:hover { transform: translateY(-2px); background: #ff581e; box-shadow: 0 21px 42px rgba(255,75,11,.3); }
.calculate-btn:hover b { transform: translateX(5px); }
.calculate-btn:active { transform: translateY(0) scale(.995); }

.result-card { margin-top: 29px; text-align: center; }
.result-divider { display: flex; align-items: center; gap: 22px; color: var(--brand); }
.result-divider::before, .result-divider::after { content: ""; height: 1px; flex: 1; background: var(--line); }
.result-divider span { font-size: 32px; transform: skew(-9deg); }
.result-label { margin: 15px 0 3px; color: #4d4d4d; text-transform: uppercase; font-size: 13px; }
.result-value { display: flex; justify-content: center; align-items: baseline; gap: 14px; }
.result-value strong { color: var(--brand); font-size: clamp(84px, 9vw, 142px); line-height: .85; letter-spacing: -.065em; font-weight: 800; font-variant-numeric: tabular-nums; }
.result-value .result-unit { font-size: clamp(29px, 3vw, 47px); font-weight: 800; text-transform: uppercase; }
.result-meta { display: none; }
.result-meta > span:not(.sr-only) + span:not(.sr-only)::before { content: "·"; margin-right: 12px; }
.result-warning { max-width: 520px; margin: 13px auto 0; padding: 10px; border-radius: 8px; background: #fff3ee; color: #96350f; font-size: 11px; }
.result-card.is-updating .result-value { animation: result-pop .48s cubic-bezier(.15,.8,.2,1); }

.comparison { padding: 28px 0 80px; background: #fbfbfa; }
.section-disclosure { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-disclosure > summary { padding: 24px 4px; display: flex; align-items: center; justify-content: space-between; list-style: none; cursor: pointer; }
.section-disclosure > summary::-webkit-details-marker { display: none; }
.section-disclosure > summary > span { display: flex; align-items: baseline; gap: 18px; font-size: 21px; font-weight: 600; }
.section-disclosure > summary small { color: var(--brand); text-transform: uppercase; letter-spacing: .13em; font-size: 9px; }
.section-disclosure > summary b { color: var(--muted); font-size: 11px; }
.section-disclosure > summary i { margin-left: 9px; color: var(--brand); font-style: normal; font-size: 20px; }
.section-disclosure[open] > summary i { display: inline-block; transform: rotate(45deg); }
.disclosure-body { padding: 52px 0 26px; }
.section-head { max-width: 760px; margin-bottom: 42px; }
.section-head h2, .guide h2, .prose-grid h2, .app-cta h2 { font-weight: 800; letter-spacing: -.045em; }
.section-head h2 { margin: 15px 0 20px; font-size: clamp(40px, 5vw, 66px); line-height: .93; }
em { color: var(--brand); font-style: normal; }
.section-head > p:last-child { color: var(--muted); font-size: 17px; }
.formula-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 28px; }
.formula-card { min-height: 170px; padding: 21px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.formula-card.is-selected { border-color: var(--brand); box-shadow: inset 0 0 0 1px var(--brand); }
.formula-card header { display: flex; justify-content: space-between; gap: 8px; align-items: start; }
.formula-card h3 { margin: 0; font-size: 17px; }
.formula-card .badge { padding: 4px 7px; border-radius: 99px; color: var(--brand-dark); background: rgba(255,75,11,.09); font-size: 8px; font-weight: 800; text-transform: uppercase; }
.formula-number { margin: 23px 0 10px; font-size: 30px; font-weight: 800; }
.formula-number span, .formula-card p { color: var(--muted); font-size: 11px; }
.formula-card p:empty { display: none; }
.table-card { padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.table-head { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 22px; }
.table-head h3 { margin: 8px 0 0; font-size: 26px; }
.table-head > p { max-width: 400px; margin: 0; color: var(--muted); font-size: 12px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 12px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .07em; }
td { font-size: 13px; font-variant-numeric: tabular-nums; }
td:first-child { color: var(--brand); font-weight: 800; }
td:nth-child(2) { font-weight: 800; }

.guide { padding: 100px 0; background: var(--night); color: #fff; }
.guide-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 100px; }
.eyebrow-light { color: #ff9168; }
.guide h2 { margin: 18px 0 0; font-size: 52px; line-height: .95; }
.guide-steps { list-style: none; margin: 0; padding: 0; }
.guide-steps li { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.13); }
.guide-steps > li > span { color: #ff7b4a; font-size: 11px; font-weight: 800; }
.guide-steps h3 { margin: 0 0 7px; font-size: 21px; }
.guide-steps p { margin: 0; color: #aaa5a0; }
.explanation { padding: 105px 0; }
.prose-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 85px; }
.prose-grid article + article { padding-left: 65px; border-left: 1px solid var(--line); }
.prose-grid h2 { margin: 15px 0 22px; font-size: 38px; line-height: 1; }
.prose-grid p:not(.eyebrow) { color: var(--muted); font-size: 16px; }
.faq { padding: 100px 0; background: #fff; }
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 85px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 21px 0; display: flex; justify-content: space-between; list-style: none; cursor: pointer; font-size: 17px; font-weight: 600; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span::before { content: "+"; color: var(--brand); }
.faq-list details[open] summary span::before { content: "−"; }
.faq-list details p { margin: -4px 0 22px; padding-right: 48px; color: var(--muted); }
.app-cta { padding: 92px 0 104px; }
.cta-panel { min-height: 490px; position: relative; overflow: hidden; padding: clamp(50px, 7vw, 88px); display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: clamp(45px, 8vw, 110px); border-radius: 30px; color: #fff; background: radial-gradient(70% 110% at 16% -20%, rgba(255,255,255,.34), transparent 55%), linear-gradient(145deg, #ff8049 0%, #ff5a20 48%, #d8480f 100%); box-shadow: 0 60px 120px -52px rgba(255,107,53,.7); isolation: isolate; }
.cta-panel::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .13; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.78' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); mix-blend-mode: overlay; }
.cta-glow { position: absolute; z-index: -1; width: 430px; height: 430px; top: -55%; right: -5%; border-radius: 50%; background: rgba(255,255,255,.24); filter: blur(14px); animation: cta-breathe 5s ease-in-out infinite alternate; }
.cta-orbit { position: absolute; z-index: -1; width: 390px; height: 390px; right: -125px; bottom: -165px; border: 1px solid rgba(255,255,255,.2); border-radius: 50%; animation: orbit 18s linear infinite; }
.cta-orbit::before, .cta-orbit::after { content: ""; position: absolute; inset: 42px; border: 1px solid rgba(255,255,255,.15); border-radius: 50%; }
.cta-orbit::after { inset: 90px; }
.cta-orbit span { position: absolute; top: 38px; left: 48px; width: 10px; height: 10px; border-radius: 50%; background: #fff; box-shadow: 0 0 24px 8px rgba(255,255,255,.35); }
.cta-copy, .cta-download { min-width: 0; position: relative; z-index: 1; }
.cta-kicker { margin: 0 0 17px; text-transform: uppercase; letter-spacing: .16em; font-size: 11px; font-weight: 800; }
.app-cta h2 { margin: 0 0 24px; font-size: clamp(58px, 6vw, 88px); line-height: .86; text-transform: uppercase; text-shadow: 0 8px 32px rgba(120,34,0,.22); }
.cta-copy > p:last-child { max-width: 540px; margin: 0; color: rgba(255,255,255,.9); font-size: 18px; }
.cta-download { padding: 34px; border: 1px solid rgba(255,255,255,.22); border-radius: 22px; background: rgba(255,255,255,.12); box-shadow: inset 0 1px 0 rgba(255,255,255,.18), 0 22px 55px -30px rgba(85,18,0,.6); backdrop-filter: blur(18px); }
.cta-download > p { margin: 0 0 20px; font-size: 17px; font-weight: 600; }
.store-actions { display: grid; gap: 12px; }
.store-button { min-height: 76px; padding: 13px 22px; display: flex; align-items: center; gap: 17px; border: 1px solid rgba(255,255,255,.18); border-radius: 15px; background: rgba(12,13,16,.95); color: #fff; text-decoration: none; box-shadow: 0 18px 34px -18px rgba(0,0,0,.72); transition: transform .25s cubic-bezier(.22,.61,.36,1), box-shadow .25s ease, background .25s ease; }
.store-button svg { width: 29px; height: 29px; flex: 0 0 auto; fill: currentColor; }
.store-button span { display: flex; flex-direction: column; line-height: 1.1; font-size: 19px; font-weight: 600; }
.store-button small { margin-bottom: 4px; opacity: .65; text-transform: uppercase; letter-spacing: .08em; font-size: 9px; font-weight: 500; }
.store-button::after { content: "↗"; margin-left: auto; color: rgba(255,255,255,.56); font-size: 24px; transition: transform .25s ease, color .25s ease; }
.store-button:hover { transform: translateY(-3px) scale(1.012); background: #060708; box-shadow: 0 25px 45px -18px rgba(0,0,0,.78); }
.store-button:hover::after { color: #fff; transform: translate(3px,-3px); }
.cta-note { display: block; margin-top: 18px; color: rgba(255,255,255,.76); text-align: center; font-size: 10px; letter-spacing: .05em; }
.disclaimer { padding: 0 0 72px; }
.disclaimer p { padding: 18px 22px; border-left: 3px solid var(--brand); background: #f0edea; color: var(--muted); font-size: 12px; }
footer { padding: 64px 0 30px; border-top: 1px solid rgba(23,25,31,.1); background: #f4f1eb; color: #181a20; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.brand-footer { margin-bottom: 16px; }
.footer-brand p { margin: 16px 0 0; color: #8a909b; font-size: 14px; }
.footer-col { display: block; }
.footer-grid h3 { margin: 0 0 12px; color: #8a909b; font-size: 10px; text-transform: uppercase; letter-spacing: .16em; }
.footer-grid nav a { display: block; padding: 5px 0; color: #545c68; text-decoration: none; font-size: 14px; transition: color .25s ease, transform .25s ease; }
.footer-grid nav a:hover { color: #d8480f; transform: translateX(3px); }
.footer-bottom { margin-top: 48px; padding-top: 25px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(23,25,31,.1); color: #8a909b; font-size: 13px; }
.footer-bottom a { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(23,25,31,.16); border-radius: 12px; color: #545c68; text-decoration: none; transition: transform .25s ease, color .25s ease, border-color .25s ease; }
.footer-bottom a:hover { color: #d8480f; border-color: #ff6b35; transform: translateY(-3px); }

@keyframes rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
@keyframes drift { from { transform: translate3d(-12px, 0, 0) scale(.96); } to { transform: translate3d(25px, -18px, 0) scale(1.06); } }
@keyframes result-pop { 0% { opacity: .55; transform: translateY(7px) scale(.97); } 55% { transform: translateY(-2px) scale(1.015); } 100% { opacity: 1; transform: none; } }
@keyframes cta-breathe { from { transform: translate3d(-25px,0,0) scale(.92); opacity: .55; } to { transform: translate3d(12px,20px,0) scale(1.08); opacity: .85; } }
@keyframes orbit { to { transform: rotate(360deg); } }

@media (max-width: 1050px) {
  .nav-links { display: none; }
  .nav-cta { margin-left: auto; }
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; gap: 55px; }
  .hero-copy { align-items: center; text-align: center; }
  .hero h1 { font-size: clamp(86px, 17vw, 142px); }
  .breadcrumbs { align-self: flex-start; }
  .formula-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid, .faq-grid { grid-template-columns: 1fr; gap: 50px; }
  .cta-panel { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 650px) {
  .container, .nav-inner { width: min(100% - 30px, var(--container)); }
  .nav { height: 64px; }
  .nav-inner { width: min(100% - 30px, 1200px); }
  .brand-name { font-size: 16px; }
  .brand-mark { width: 31px; height: 31px; margin-right: 8px; }
  .nav-cta { padding: 10px 13px; font-size: 12px; }
  .hero { padding: 92px 0 34px; align-items: flex-start; }
  .hero-grid { gap: 31px; }
  .breadcrumbs, .eyebrow, .hero-more { display: none; }
  .hero-copy { width: 100%; }
  .hero h1 { margin: 0 0 15px; font-size: clamp(64px, 21vw, 92px); line-height: .8; }
  .hero-lead { font-size: 19px; }
  .calculator-card { padding: 21px 17px 25px; border-radius: 20px; }
  .card-head > p { font-size: 11px; }
  .form-grid, .form-grid-primary, .formula-grid, .prose-grid, .footer-grid { grid-template-columns: 1fr; }
  .form-grid-primary { gap: 13px; }
  .field { font-size: 12px; }
  .input-wrap { min-height: 82px; }
  .input-wrap input { font-size: 44px; }
  .input-wrap b { font-size: 15px; }
  .field small:not(.error) { display: none; }
  .advanced-options > summary span { display: none; }
  .advanced-options .form-grid { gap: 14px; }
  .calculate-btn { min-height: 66px; padding: 15px 21px; font-size: 20px; }
  .calculate-btn b { right: 22px; font-size: 31px; }
  .result-card { margin-top: 23px; }
  .result-value strong { font-size: clamp(70px, 21vw, 96px); }
  .result-value .result-unit { font-size: 28px; }
  .result-meta { flex-wrap: wrap; }
  .comparison { padding: 12px 0 50px; }
  .section-disclosure > summary > span { display: block; font-size: 16px; }
  .section-disclosure > summary small { display: block; margin-bottom: 5px; }
  .section-disclosure > summary b { font-size: 0; }
  .section-disclosure > summary i { font-size: 20px; }
  .disclosure-body { padding-top: 35px; }
  .formula-grid { grid-template-columns: 1fr; }
  .table-card { padding: 18px; }
  .table-head, .cta-panel { flex-direction: column; align-items: flex-start; }
  .guide, .explanation, .faq { padding: 76px 0; }
  .guide h2, .app-cta h2 { font-size: 38px; }
  .prose-grid { gap: 34px; }
  .prose-grid article + article { padding: 34px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .app-cta { padding: 66px 0 76px; }
  .cta-panel { min-height: 0; padding: 44px 21px 24px; gap: 35px; border-radius: 23px; }
  .app-cta h2 { font-size: clamp(42px, 12vw, 60px); }
  .cta-copy > p:last-child { font-size: 16px; }
  .cta-download { padding: 18px; border-radius: 18px; }
  .store-button { min-height: 68px; padding: 11px 16px; }
  .store-button span { font-size: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}