:root{--paper:#f4f0e7;--ink:#24221e;--orange:#e45d32;--green:#dce7d9;--line:#cbc4b7;--muted:#6e685f;--white:#fffdf8;--radius:10px;--mobile-result-height:0px;--mobile-result-bottom:max(12px,env(safe-area-inset-bottom));font-family:system-ui,-apple-system,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.65}a{color:inherit}button,input{font:inherit}button{cursor:pointer}.wrap{width:min(1120px,calc(100% - 32px));margin-inline:auto}.site-header{border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--paper) 94%,transparent);position:sticky;top:0;z-index:10;backdrop-filter:blur(10px)}.header-inner{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px}.logo{font-size:1.25rem;font-weight:900;letter-spacing:-.06em;text-decoration:none}.logo i{display:inline-block;width:9px;height:9px;background:var(--orange);margin-right:7px}.nav{display:flex;gap:20px;font-size:.88rem}.nav a{text-decoration:none;color:var(--muted)}.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}
.hero{padding:72px 0 40px}.eyebrow{display:block;color:var(--orange);font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.hero h1,.page-hero h1{font-size:clamp(2.6rem,7vw,5.7rem);line-height:.98;letter-spacing:-.075em;margin:14px 0 24px;max-width:850px}.hero p,.page-hero>p{font-size:clamp(1rem,2vw,1.25rem);color:var(--muted);max-width:620px}.quick-facts{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}.quick-facts span{border:1px solid var(--line);border-radius:99px;padding:7px 12px;font-size:.78rem;background:var(--white)}
.calculator{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(330px,.92fr);gap:24px;align-items:start;padding-bottom:92px}.panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius)}.input-panel{padding:28px}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;border-bottom:2px solid var(--ink);padding-bottom:12px}.section-head h2{font-size:1.3rem;margin:0;letter-spacing:-.04em}.section-head span{font-size:.75rem;color:var(--muted)}.item-list{list-style:none;margin:0;padding:0}.item-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}.item-row strong,.item-row small{display:block}.item-row small{font-size:.75rem;color:var(--muted);margin-top:2px}.counter{display:flex;align-items:center;gap:6px}.counter input{width:64px;border:1px solid var(--line);border-radius:6px;padding:7px;text-align:right;background:white}.text-button{border:0;background:none;color:var(--orange);padding:8px}.custom-details{margin-top:22px}.custom-details summary{font-weight:800;cursor:pointer;padding:10px 0}.custom-form{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-top:10px}.field{grid-column:span 2}.field.wide{grid-column:span 3}.field label{font-size:.72rem;color:var(--muted);display:block;margin-bottom:4px}.field input{width:100%;padding:10px;border:1px solid var(--line);border-radius:6px;background:#fff}.check{grid-column:span 3;font-size:.82rem;align-self:center}.add-button{grid-column:span 3;border:0;border-radius:6px;background:var(--ink);color:white;font-weight:800}.result-panel{position:sticky;top:92px;background:var(--ink);color:white;padding:30px;min-height:420px}.empty-result{min-height:355px;display:flex;flex-direction:column;justify-content:center}.empty-result span{font:700 .72rem ui-monospace,monospace;color:#a6a096;letter-spacing:.12em}.empty-result strong{font-size:1.65rem;margin:12px 0}.empty-result p,.result-caption,.gauge-label,.disclaimer{color:#bbb4a9;font-size:.82rem}.result-top{display:flex;justify-content:space-between;align-items:start;gap:12px}.result-volume{font:800 1.5rem ui-monospace,monospace}.vehicle-picks{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:#575248;border:1px solid #575248;margin:24px 0}.vehicle-picks div{padding:18px;background:var(--ink)}.vehicle-picks .recommended{background:var(--orange)}.vehicle-picks small,.vehicle-picks strong{display:block}.vehicle-picks small{font-size:.7rem;opacity:.75}.vehicle-picks strong{font-size:1.2rem;margin-top:5px}.gauge{height:12px;border:1px solid #716b61;padding:2px}.gauge span{display:block;height:100%;background:var(--green)}.warnings{padding-left:18px;color:#f7c8b8;font-size:.82rem}.disclaimer{border-top:1px solid #575248;padding-top:16px;margin-top:20px}
.trust-strip{border-block:1px solid var(--line);padding:32px 0;margin-bottom:80px}.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.trust-grid strong{display:block;margin-bottom:6px}.trust-grid p{margin:0;color:var(--muted);font-size:.88rem}.page-hero{padding:76px 0 52px;border-bottom:1px solid var(--line)}.page-hero h1{font-size:clamp(2.5rem,6vw,4.8rem)}.article{width:min(760px,calc(100% - 32px));margin:64px auto 100px}.article h2{font-size:1.6rem;letter-spacing:-.045em;margin:48px 0 12px}.article h3{margin-top:30px}.article p,.article li{color:#4f4a43}.article table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.9rem}.article th,.article td{text-align:left;border-bottom:1px solid var(--line);padding:13px 8px}.article th{font-size:.75rem;color:var(--muted)}.note{border-left:4px solid var(--orange);background:var(--white);padding:18px 20px;margin:28px 0}.steps{counter-reset:step;list-style:none;padding:0}.steps li{counter-increment:step;border-top:1px solid var(--line);padding:20px 0 20px 50px;position:relative}.steps li:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;font:700 .8rem ui-monospace,monospace;color:var(--orange)}.cta-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:45px 0}.cta-links a{border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;background:var(--white);font-weight:800}.site-footer{border-top:1px solid var(--line);padding:34px 0 48px;color:var(--muted);font-size:.8rem}.footer-inner{display:flex;justify-content:space-between;gap:22px;flex-wrap:wrap}.footer-links{display:flex;gap:16px;flex-wrap:wrap}.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}
.menu-toggle,.mobile-nav,.mobile-result{display:none}.menu-toggle{border:1px solid var(--ink);border-radius:6px;background:var(--white);color:var(--ink);font-size:.82rem;font-weight:800;padding:8px 10px}.mobile-nav{border-top:1px solid var(--line);background:var(--paper);padding:8px 16px}.mobile-nav a{border-bottom:1px solid var(--line);padding:11px 0;text-decoration:none;font-size:.9rem}.mobile-nav-current{order:-1;color:var(--muted);font-size:.72rem;padding:6px 0 3px}.mobile-guide{counter-reset:guide;display:grid;grid-template-columns:repeat(3,1fr);gap:10px;list-style:none;margin:16px 0 4px;padding:0}.mobile-guide li{counter-increment:guide;position:relative;padding:8px 8px 8px 31px;background:var(--green);font-size:.74rem;line-height:1.45}.mobile-guide li::before{content:counter(guide);position:absolute;left:10px;top:8px;color:var(--orange);font:800 .78rem ui-monospace,monospace}.text-button{font-weight:800}.text-button:disabled,#reset-button:disabled{color:var(--muted);cursor:not-allowed;opacity:.55}#result-dialog{width:min(680px,calc(100% - 32px));max-height:calc(100dvh - 64px);border:1px solid #575248;border-radius:var(--radius);background:var(--ink);color:white;padding:22px;overflow-y:auto}#result-dialog::backdrop{background:rgb(36 34 30 / .62);backdrop-filter:blur(2px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid #575248;margin-bottom:16px;padding-bottom:12px}.dialog-head h2{margin:0;font-size:1.15rem}.dialog-close{width:100%;min-height:44px;border:0;border-radius:6px;background:var(--white);color:var(--ink);font-weight:800;margin-top:18px}
@media(max-width:780px){.nav{display:none}.menu-toggle{display:inline-flex;align-items:center;justify-content:center}.mobile-nav[data-open]{display:grid}.mobile-guide{grid-template-columns:1fr}.hero{padding-top:50px}.calculator{grid-template-columns:1fr;padding-bottom:24px}.result-panel{display:none}.empty-result{min-height:190px}.custom-form{grid-template-columns:repeat(2,1fr)}.field,.field.wide,.check,.add-button{grid-column:span 1}.trust-grid,.cta-links{grid-template-columns:1fr}.trust-grid{gap:20px}.article{margin-top:45px}.article table{font-size:.78rem}.article th,.article td{padding:10px 4px}body:has(#mobile-result){padding-bottom:calc(var(--mobile-result-height) + var(--mobile-result-bottom))}.mobile-result{position:fixed;z-index:20;left:16px;right:16px;bottom:var(--mobile-result-bottom);display:block;min-height:44px;border:1px solid #575248;border-radius:var(--radius);background:var(--ink);box-shadow:0 10px 24px rgb(36 34 30 / .22);color:white}.mobile-result-prompt{display:block;padding:10px 14px;color:#bbb4a9;font-size:.82rem}.mobile-result-button{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:12px;width:100%;min-height:44px;border:0;border-radius:inherit;background:transparent;color:inherit;padding:10px 14px;text-align:left}.mobile-result-recommendation small,.mobile-result-recommendation strong{display:block}.mobile-result-recommendation small{font-size:.7rem;color:#ddd6ca}.mobile-result-button strong{font-size:.98rem}.mobile-result-volume{font:800 .82rem ui-monospace,monospace;color:#ddd6ca}.mobile-result-detail{font-size:.75rem;color:var(--green);font-weight:800}#result-dialog{position:fixed;inset:auto 0 0;width:100%;max-width:none;max-height:min(80dvh,720px);margin:0;border-radius:var(--radius) var(--radius) 0 0;padding:20px 20px calc(20px + env(safe-area-inset-bottom))}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}