:root{--bg: #0d0f14;--bg-elev: #12151c;--card: #161a22;--card-2: #1b2029;--line: #272d39;--line-soft: #1f2530;--text: #eef1f7;--muted: #97a0b0;--accent: #5b8cff;--accent-2: #6f7bff;--good: #36d39f;--good-dim: rgba(54, 211, 159, .14);--bad: #ff7b7b;--radius: 16px;--shadow: 0 6px 24px rgba(0, 0, 0, .35);--header-bg: rgba(13, 15, 20, .78);color-scheme:dark}:root[data-theme=light]{--bg: #f5f7fb;--bg-elev: #ffffff;--card: #ffffff;--card-2: #fbfcfe;--line: #e3e8f0;--line-soft: #eef1f7;--text: #161b25;--muted: #5a6573;--accent: #3f72f0;--accent-2: #5468f0;--good: #12a87a;--good-dim: rgba(18, 168, 122, .12);--bad: #e0484d;--shadow: 0 6px 22px rgba(20, 30, 60, .08);--header-bg: rgba(245, 247, 251, .82);color-scheme:light}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:Pretendard,system-ui,-apple-system,Segoe UI,Apple SD Gothic Neo,sans-serif;background:radial-gradient(1100px 520px at 78% -8%,rgba(91,140,255,.1),transparent 60%),radial-gradient(900px 500px at 8% 0%,rgba(54,211,159,.07),transparent 55%),var(--bg);background-attachment:fixed;color:var(--text);line-height:1.62;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--accent);text-decoration:none}.container{max-width:780px;margin:0 auto;padding:28px 20px 96px}header.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:16px;padding:12px 20px;background:var(--header-bg);-webkit-backdrop-filter:saturate(140%) blur(12px);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line-soft)}header.nav .brand{font-weight:800;font-size:18px;letter-spacing:-.02em;flex-shrink:0}header.nav nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}header.nav nav::-webkit-scrollbar{display:none}header.nav nav a{color:var(--muted);font-size:14px;font-weight:600;padding:7px 12px;border-radius:999px;white-space:nowrap;transition:color .15s,background .15s}header.nav nav a:hover{color:var(--text)}header.nav nav a.router-link-active{color:var(--text);background:#5b8cff29}.theme-toggle{flex-shrink:0;width:38px;height:38px;border-radius:999px;border:1px solid var(--line);background:var(--bg-elev);font-size:17px;line-height:1;cursor:pointer;transition:border-color .15s,transform .05s}.theme-toggle:hover{border-color:var(--accent)}.theme-toggle:active{transform:scale(.94)}h1{font-size:30px;line-height:1.2;margin:6px 0;letter-spacing:-.025em;font-weight:800}h2{font-size:20px;margin:0 0 12px;letter-spacing:-.02em;font-weight:700}h3{font-weight:700}.muted{color:var(--muted);font-size:14px}.card{background:linear-gradient(180deg,var(--card-2),var(--card));border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0;box-shadow:var(--shadow)}.result{border-color:#5b8cff66}label{display:block;font-size:13px;color:var(--muted);margin:12px 0 5px;font-weight:600}input,select{width:100%;padding:11px 13px;border-radius:11px;border:1px solid var(--line);background:var(--bg-elev);color:var(--text);font-size:15px;font-family:inherit;transition:border-color .15s,box-shadow .15s}input:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #5b8cff38}.row{display:flex;gap:12px}.row>*{flex:1;min-width:0}button.primary{margin-top:20px;width:100%;padding:13px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:filter .15s,transform .05s}button.primary:hover{filter:brightness(1.07)}button.primary:active{transform:translateY(1px)}button.primary:disabled{opacity:.5;cursor:default;filter:none}.metric{font-size:32px;font-weight:800;color:var(--good)}.tag{display:inline-block;font-size:13px;padding:2px 9px;border-radius:999px;background:#21262f;color:var(--muted);margin-left:6px;vertical-align:middle}ul.notes{padding-left:18px;margin:8px 0}.error{color:var(--bad);font-size:14px;margin-top:10px}.tip{color:var(--good);font-size:13px;margin:6px 0 0;font-weight:600}.dist{width:100%;max-width:460px;height:auto;display:block;margin:16px auto 4px}.unit-ko{color:var(--muted);font-size:13px;margin:4px 0 0}.disclaimer{font-size:12px;color:var(--muted);margin-top:12px;line-height:1.5}.home-hero{text-align:center;padding:18px 0 8px}.home-hero .eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.02em;color:var(--good);background:var(--good-dim);padding:5px 12px;border-radius:999px;margin-bottom:14px}.home-hero h1{font-size:34px}.home-hero p{color:var(--muted);max-width:46ch;margin:8px auto 0}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}.feature-grid .card{margin:0;transition:transform .12s,border-color .15s}.feature-grid a.card:hover{transform:translateY(-3px);border-color:#5b8cff80}.feature-grid h2{font-size:18px}footer.site{border-top:1px solid var(--line-soft);color:var(--muted);font-size:13px;text-align:center;padding:28px 20px 104px}.bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;background:var(--header-bg);-webkit-backdrop-filter:saturate(140%) blur(12px);backdrop-filter:saturate(140%) blur(12px);border-top:1px solid var(--line-soft);padding-bottom:env(safe-area-inset-bottom)}.bn-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 0 11px;color:var(--muted);font-size:11px;font-weight:600}.bn-ico{font-size:21px;line-height:1}.bn-item.active{color:var(--accent)}.seg{display:flex;gap:8px}.seg button{flex:1;padding:12px;border-radius:11px;border:1px solid var(--line);background:var(--bg-elev);color:var(--text);font-size:15px;font-weight:600;cursor:pointer}.seg button.on{border-color:var(--accent);background:#5b8cff24;color:var(--accent)}footer.site a{color:var(--muted)}.sec-head{display:flex;align-items:center;gap:10px;margin-bottom:4px}.sec-head h2{margin:0}.sec-tag{font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--good-dim);color:var(--good)}.sec-tag.blue{background:#5b8cff29;color:var(--accent)}.hero{display:flex;align-items:baseline;gap:16px;margin:16px 0 6px;flex-wrap:wrap}.hero-num{font-size:50px;font-weight:800;line-height:1;letter-spacing:-.03em;background:linear-gradient(135deg,var(--good),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-num small{font-size:24px;margin-left:2px}.result+.result .hero-num{background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-cap{font-size:14px;line-height:1.4}.summary{background:var(--bg-elev);border:1px solid var(--line);border-radius:12px;padding:11px 14px;margin:8px 0 4px;font-size:14px}.note{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-style:normal}.tbar{margin:28px 0 4px}.tbar-track{position:relative;height:14px;background:var(--bg-elev);border:1px solid var(--line);border-radius:999px}.tbar-fill{position:absolute;left:0;top:0;bottom:0;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--good))}.tbar-tick{position:absolute;top:-4px;bottom:-4px;width:2px;background:var(--line);transform:translate(-1px)}.tbar-pin{position:absolute;top:-24px;transform:translate(-50%)}.tbar-pin:after{content:"";display:block;width:2px;height:24px;background:var(--text);margin:2px auto 0}.tbar-pin-label{display:inline-block;background:var(--text);color:var(--bg);font-size:11px;font-weight:800;padding:2px 7px;border-radius:6px;white-space:nowrap}.tbar-axis{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:6px}.grp{font-size:14px;margin:18px 0 8px;color:var(--text)}.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,1fr));gap:10px}.chips.small{grid-template-columns:repeat(auto-fill,minmax(92px,1fr))}.chip2{background:var(--bg-elev);border:1px solid var(--line);border-radius:12px;padding:12px;transition:border-color .15s,background .15s}.chip2.on{border-color:var(--good);background:var(--good-dim)}.chip2 .nm{font-size:13px;color:var(--muted)}.chip2 .nm em{font-style:normal;color:var(--text);font-weight:600}.chip2 .lim{font-size:14px;font-weight:700;margin:3px 0 8px}.badge{display:inline-block;font-size:12px;font-weight:700;padding:2px 9px;border-radius:999px}.badge.ok{background:var(--good-dim);color:var(--good)}.badge.no{background:#ff7b7b21;color:#ff9a9a}.stack{display:flex;height:22px;border-radius:999px;overflow:hidden;margin:18px 0 6px;border:1px solid var(--line)}.stack-seg{height:100%;min-width:1px}.child-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}.child-row input{flex:1}.age-hint{min-width:56px;font-size:13px}button.mini{background:var(--bg-elev);border:1px solid var(--line);color:var(--text);border-radius:9px;padding:8px 12px;cursor:pointer;font-size:14px}button.mini.add{margin-top:4px;color:var(--accent)}button.mini:disabled{opacity:.4;cursor:default}.test-item{padding:14px 0;border-top:1px solid var(--line-soft)}.test-item:first-of-type{border-top:0}.test-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}.test-head strong{font-size:16px}.test-sub{font-size:12px;color:var(--muted)}.test-what{font-size:14px;margin:6px 0 4px}.test-couple{font-size:13.5px;color:var(--good);margin:0}.stat-list{margin-top:16px;border-top:1px solid var(--line-soft)}.stat{display:flex;justify-content:space-between;align-items:baseline;padding:11px 2px;border-bottom:1px solid var(--line-soft)}.stat .k{color:var(--muted);font-size:14px}.stat .v{font-weight:700;font-size:16px}.quick{display:flex;gap:8px;margin-top:8px}.quick button{flex:0 0 auto;background:var(--bg-elev);border:1px solid var(--line);color:var(--text);border-radius:9px;padding:7px 12px;font-size:13px;font-weight:600;cursor:pointer}.quick button:hover{border-color:var(--accent)}.warn{background:#ff7b7b1a;border:1px solid rgba(255,123,123,.35);color:#ffb0b0;border-radius:10px;padding:10px 13px;font-size:13px;margin-top:12px}details.info{padding:0;overflow:hidden}details.info>summary{list-style:none;cursor:pointer;padding:16px 20px;font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px}details.info>summary::-webkit-details-marker{display:none}details.info>summary:after{content:"▾";margin-left:auto;color:var(--muted);transition:transform .2s}details.info[open]>summary:after{transform:rotate(180deg)}.info-body{padding:0 20px 18px;border-top:1px solid var(--line-soft)}.info-body h3{font-size:16px;margin:16px 0 8px}.info-body h4{font-size:14px;margin:16px 0 4px;color:var(--accent)}.info-body p{font-size:13.5px;color:var(--muted);margin:4px 0;line-height:1.6}.info-body .hot{color:var(--text);font-weight:700}.share-wrap{margin-top:16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}button.share{background:#5b8cff29;color:var(--accent);border:1px solid rgba(91,140,255,.4);border-radius:11px;padding:10px 18px;font-size:14px;font-weight:700;cursor:pointer;transition:background .15s}button.share:hover{background:#5b8cff42}.share-msg{color:var(--good);font-size:13px;font-weight:600}@media (max-width: 560px){.container{padding:22px 16px 80px}.feature-grid{grid-template-columns:1fr}.row{flex-direction:column}h1{font-size:26px}.home-hero h1{font-size:28px}.hero-num{font-size:42px}}