:root{--navy:#2b3155;--navy-soft:#3b4270;--coral:#ff6b5b;--grad-top:#7fa6e6;--grad-mid:#c9c7f0;--grad-bottom:#fde3ec;--surface:#ffffffed;--surface-solid:#fff;--surface-2:#f2f3fa;--text:#2b3155;--text-2:#4a5078;--text-3:#6b7192;--line:#2b31551a;--accent:var(--coral);--accent-soft:#e9ecf8;--accent-text:#3b4270;--focus:#3b4270;--danger:#c93a2d;--danger-soft:#ffecea;--warn:#8a5a00;--warn-soft:#fff4dd;--shadow:0 6px 20px #2b31551f;--shadow-sm:0 2px 8px #2b315514;--radius:22px;--radius-md:16px;--radius-sm:12px;--on-hero:#fff;--on-hero-2:#ffffffeb;--hero-shadow:0 2px 10px #2b315540;--header-bg:#7fa6e68c;--header-line:#ffffff40;--glass:#ffffff38;--glass-line:#ffffff59;--section-label:#3b4270;--cat-work:#4f74d9;--cat-work-soft:#e6ecfb;--cat-finance:#1f9e7e;--cat-finance-soft:#dff4ee;--cat-unit:#1592ab;--cat-unit-soft:#ddf2f6;--cat-date:#7c5cd6;--cat-date-soft:#eee8fb;--cat-life:#e07a3f;--cat-life-soft:#fdebdf;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--grad-top:#171a33;--grad-mid:#262b4f;--grad-bottom:#3a2c4c;--surface:#212542eb;--surface-solid:#212542;--surface-2:#2a2f55;--text:#eef0fa;--text-2:#c2c6e0;--text-3:#9298bc;--line:#ffffff1a;--accent:#ff7a6b;--accent-soft:#343a66;--accent-text:#c8cef5;--focus:#c8cef5;--danger:#ff8a7d;--danger-soft:#4a2530;--warn:#f0c064;--warn-soft:#3e3320;--shadow:0 6px 20px #00000059;--shadow-sm:0 2px 8px #0000004d;--header-bg:#171a3399;--header-line:#ffffff1a;--glass:#ffffff1a;--glass-line:#ffffff2e;--section-label:#c8cef5;--cat-work:#8fadff;--cat-work-soft:#2b3566;--cat-finance:#5fd6b3;--cat-finance-soft:#1d3d3f;--cat-unit:#5ccde3;--cat-unit-soft:#1c3a4a;--cat-date:#b9a2ff;--cat-date-soft:#352d5e;--cat-life:#f5a66f;--cat-life-soft:#45303a;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--grad-top:#171a33;--grad-mid:#262b4f;--grad-bottom:#3a2c4c;--surface:#212542eb;--surface-solid:#212542;--surface-2:#2a2f55;--text:#eef0fa;--text-2:#c2c6e0;--text-3:#9298bc;--line:#ffffff1a;--accent:#ff7a6b;--accent-soft:#343a66;--accent-text:#c8cef5;--focus:#c8cef5;--danger:#ff8a7d;--danger-soft:#4a2530;--warn:#f0c064;--warn-soft:#3e3320;--shadow:0 6px 20px #00000059;--shadow-sm:0 2px 8px #0000004d;--header-bg:#171a3399;--header-line:#ffffff1a;--glass:#ffffff1a;--glass-line:#ffffff2e;--section-label:#c8cef5;--cat-work:#8fadff;--cat-work-soft:#2b3566;--cat-finance:#5fd6b3;--cat-finance-soft:#1d3d3f;--cat-unit:#5ccde3;--cat-unit-soft:#1c3a4a;--cat-date:#b9a2ff;--cat-date-soft:#352d5e;--cat-life:#f5a66f;--cat-life-soft:#45303a;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;background-color:var(--grad-bottom)}body{background-color:var(--grad-mid);background-image:linear-gradient(180deg, var(--grad-top) 0%, var(--grad-mid) 42%, var(--grad-bottom) 100%);min-height:100vh;color:var(--text);word-break:keep-all;overflow-wrap:break-word;margin:0;font-family:Poppins,Noto Sans KR,-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,Malgun Gothic,Segoe UI,sans-serif;font-size:16px;line-height:1.6}a{color:var(--accent-text)}.container{width:100%;max-width:760px;margin:0 auto;padding:0 16px}.site-header{z-index:10;background:var(--header-bg);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--header-line);position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;height:60px;display:flex}.logo{color:var(--on-hero);letter-spacing:-.02em;text-shadow:var(--hero-shadow);align-items:center;gap:10px;font-size:19px;font-weight:700;text-decoration:none;display:inline-flex}.logo-mark{width:34px;height:34px;box-shadow:0 0 0 1.5px var(--glass-line);border-radius:50%;display:inline-grid}.logo-mark svg{width:34px;height:34px}.icon-btn{border:1px solid var(--line);background:var(--surface-2);width:40px;height:40px;color:var(--text-2);cursor:pointer;border-radius:50%;place-items:center;display:inline-grid}.icon-btn:hover{color:var(--text)}.icon-btn svg{width:20px;height:20px}.site-header .icon-btn{background:var(--glass);border-color:var(--glass-line);color:var(--on-hero)}.site-header .icon-btn:hover{background:#ffffff52}.theme-icon-light,.theme-icon-dark{display:inline-grid}.theme-icon-dark,:root[data-theme=dark] .theme-icon-light{display:none}:root[data-theme=dark] .theme-icon-dark{display:inline-grid}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .theme-icon-light{display:none}:root:not([data-theme=light]) .theme-icon-dark{display:inline-grid}}.icon{place-items:center;display:inline-grid}.icon svg{width:1em;height:1em}.site-footer{color:var(--text-2);margin-top:56px;padding:24px 0 40px;font-size:13.5px}.footer-links{flex-wrap:wrap;gap:4px 18px;margin-bottom:8px;display:flex}.footer-links a{color:var(--text-2);font-weight:600;text-decoration:none}.footer-links a:hover{color:var(--text);text-decoration:underline}.footer-note,.footer-copy{margin:4px 0}.footer-copy a{color:inherit;font-weight:600;text-decoration:none}.footer-copy a:hover{text-decoration:underline}main{padding-top:32px}.hero,.calc-head{color:var(--on-hero)}.hero h1,.calc-head h1{text-shadow:var(--hero-shadow)}.hero{text-align:center;padding:20px 0 8px}.hero h1{letter-spacing:-.03em;margin:0 0 6px;font-size:32px;font-weight:700;line-height:1.3}.hero p{max-width:30em;color:var(--on-hero-2);margin:0 auto 22px;font-weight:500}.search{max-width:560px;margin:0 auto;position:relative}.search input{background:var(--surface-solid);width:100%;height:54px;color:var(--text);box-shadow:var(--shadow);border:0;border-radius:999px;padding:0 20px 0 50px;font-family:inherit;font-size:16px}.search input:focus{outline:2px solid var(--focus);outline-offset:2px}.search-icon{color:var(--text-3);pointer-events:none;display:grid;position:absolute;top:50%;left:20px;transform:translateY(-50%)}.search-icon svg{width:20px;height:20px}.search-empty{text-align:center;color:var(--text-2);margin:24px 0;font-weight:600}.category h2,.recent h2,.related h2{letter-spacing:.08em;color:var(--section-label);margin:32px 4px 12px;font-size:13px;font-weight:700}.categories{grid-template-columns:1fr;column-gap:12px;display:grid}.category{grid-column:1/-1}@media (width>=560px){.categories{grid-template-columns:1fr 1fr}.category-half{flex-direction:column;grid-column:auto;display:flex}.category-half .card-grid{flex:1;grid-template-columns:1fr}}.card-grid{grid-template-columns:1fr;gap:12px;display:grid}@media (width>=560px){.card-grid{grid-template-columns:1fr 1fr}}.calc-card{border-radius:var(--radius);background:var(--surface);color:var(--text);box-shadow:var(--shadow);align-items:center;gap:14px;padding:16px;text-decoration:none;transition:transform .15s,box-shadow .15s;display:flex}.calc-card:hover,.calc-card:focus-visible{transform:translateY(-2px);box-shadow:0 10px 26px #2b31552e}.calc-card:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.calc-card:active{transform:scale(.99)}.calc-card-icon{background:var(--cat-soft,var(--surface-2));width:52px;height:52px;color:var(--cat-color,var(--text-2));border-radius:16px;flex:none;place-items:center;display:grid}.calc-card-icon svg{width:24px;height:24px}.calc-card-text{flex-direction:column;flex:1;min-width:0;display:flex}.calc-card-text strong{letter-spacing:-.01em;font-size:16.5px;font-weight:700}.calc-card-text span{color:var(--text-3);font-size:13px;line-height:1.45}.calc-card-arrow{color:var(--text-3);flex:none;display:grid}.calc-card-arrow svg{width:18px;height:18px}[data-category=work]{--cat-color:var(--cat-work);--cat-soft:var(--cat-work-soft)}[data-category=finance]{--cat-color:var(--cat-finance);--cat-soft:var(--cat-finance-soft)}[data-category=life]{--cat-color:var(--cat-life);--cat-soft:var(--cat-life-soft)}[data-category=date]{--cat-color:var(--cat-date);--cat-soft:var(--cat-date-soft)}[data-category=unit]{--cat-color:var(--cat-unit);--cat-soft:var(--cat-unit-soft)}.card-grid>.calc-card:only-child{grid-column:1/-1}.recent-list{flex-wrap:wrap;gap:8px;display:flex}.chip{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm);border-radius:999px;align-items:center;gap:6px;padding:8px 14px 8px 10px;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.chip:hover{box-shadow:var(--shadow)}.chip .icon{color:var(--cat-color,var(--text-2));font-size:18px}.calc-head{padding:8px 0 4px}.calc-head h1{letter-spacing:-.03em;margin:0;font-size:28px;font-weight:700;line-height:1.3}.calc-head .lead{color:var(--on-hero-2);margin:6px 0 10px;font-weight:500}.badge{background:var(--glass);border:1px solid var(--glass-line);color:var(--on-hero);border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:700;display:inline-block}.card{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);margin-top:16px;padding:22px 18px}@media (width>=560px){.card{padding:26px 28px}}.field{margin-bottom:16px}.field:has(>.hint){margin-bottom:6px}.field:last-child{margin-bottom:0}.field>label,.field>.label{color:var(--text-2);margin-bottom:6px;font-size:14px;font-weight:700;display:block}.field-row{grid-template-columns:1fr 1fr;gap:12px;display:grid}.input-wrap{align-items:center;display:flex;position:relative}.input-wrap .unit{color:var(--text-3);pointer-events:none;font-weight:600;position:absolute;right:16px}input[type=text],input[type=date],input[type=number],select{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface-2);width:100%;height:50px;color:var(--text);padding:0 16px;font-family:inherit;font-size:17px;font-weight:500}.input-wrap input{text-align:right;padding-right:48px}input:focus,select:focus{outline:2px solid var(--focus);outline-offset:-1px;background:var(--surface-solid)}.hint{min-height:20px;color:var(--accent-text);text-align:right;margin:2px 4px 0;font-size:13px;font-weight:700;line-height:20px}.help{color:var(--text-3);margin:4px 2px 0;font-size:13px}.help-block{margin:-6px 2px 16px}.term-row{grid-template-columns:minmax(0,1fr) 84px;gap:6px;display:grid}.field-row+.quick{margin-bottom:16px}.quick:has(+.field){margin-bottom:16px}.field-row+.quick{margin-top:-6px}.segmented{background:var(--accent-soft);border-radius:999px;gap:4px;padding:4px;display:flex}.segmented label{flex:1;position:relative}.segmented input{opacity:0;position:absolute;inset:0}.segmented span{text-align:center;color:var(--text-2);cursor:pointer;border-radius:999px;padding:9px 4px;font-size:14px;font-weight:600;transition:background .15s;display:block}.segmented input:checked+span{background:var(--surface-solid);color:var(--text);box-shadow:var(--shadow-sm);font-weight:700}.segmented input:focus-visible+span{outline:2px solid var(--focus)}.check{color:var(--text-2);cursor:pointer;align-items:center;gap:8px;font-size:15px;display:flex}.check input{width:20px;height:20px;accent-color:var(--navy-soft)}.quick{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.quick button{background:var(--accent-soft);color:var(--accent-text);cursor:pointer;border:0;border-radius:999px;padding:7px 14px;font-family:inherit;font-size:13.5px;font-weight:600}.quick button:hover{background:var(--surface-2);box-shadow:inset 0 0 0 1.5px var(--accent-text)}.result{box-shadow:var(--shadow), inset 0 4px 0 var(--accent)}.result-top{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.result-label{color:var(--text-2);font-size:14px;font-weight:700}.result-value{letter-spacing:-.02em;color:var(--text);margin:2px 0 0;font-size:36px;font-weight:700;line-height:1.25}.result-sub{color:var(--text-2);margin:2px 0 0;font-size:14px;font-weight:500}.copy-btn{background:var(--accent-soft);color:var(--accent-text);cursor:pointer;border:0;border-radius:999px;flex:none;align-items:center;gap:5px;padding:7px 13px 7px 11px;font-family:inherit;font-size:13px;font-weight:600;display:inline-flex}.copy-btn:hover{box-shadow:inset 0 0 0 1.5px var(--accent-text)}.copy-btn .icon{font-size:15px}.result-section{color:var(--text-2);margin:24px 0 0;font-size:14px;font-weight:700}.result-empty{color:var(--text-3);margin:0;font-weight:500}.result-error{border-radius:var(--radius-sm);background:var(--danger-soft);color:var(--danger);margin:0;padding:12px 16px;font-weight:700}.rows{border-top:1px dashed var(--line);margin:18px 0 0;padding:14px 0 0}.rows div{justify-content:space-between;gap:12px;padding:5px 0;display:flex}.rows dt{color:var(--text-2)}.rows dd{font-variant-numeric:tabular-nums;text-align:right;margin:0;font-weight:500}.rows .strong dt,.rows .strong dd{color:var(--text);font-weight:700}.notes{margin:14px 0 0;padding:0;font-size:14px;list-style:none}.notes li{border-radius:var(--radius-sm);background:var(--surface-2);color:var(--text-2);margin-top:6px;padding:10px 14px}.notes li.warn{background:var(--warn-soft);color:var(--warn);font-weight:700}.disclaimer{color:var(--text-2);margin:10px 6px 0;font-size:13px}.table-wrap{margin-top:16px;overflow-x:auto}table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:14px}th,td{border-bottom:1px solid var(--line);text-align:right;white-space:nowrap;padding:9px 8px}th:first-child,td:first-child{text-align:left}th{color:var(--text-2);background:var(--accent-soft);font-weight:700}th:first-child{border-radius:10px 0 0 10px}th:last-child{border-radius:0 10px 10px 0}tr.highlight td{color:var(--text);font-weight:700}tr.highlight td:first-child{box-shadow:inset 3px 0 0 var(--accent)}details.more{margin-top:18px}details.more summary{cursor:pointer;color:var(--accent-text);font-weight:700}.prose,.faq{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);margin-top:28px;padding:24px 20px}@media (width>=560px){.prose,.faq{padding:30px 32px}}.prose.page{margin-top:0}.prose.page h1{letter-spacing:-.03em;margin:0 0 12px;font-size:26px}.prose.page h2{margin-top:28px;font-size:18px}.prose h2,.faq h2{letter-spacing:-.02em;margin:0 0 12px;font-size:20px;font-weight:700}.prose h3{margin:24px 0 8px;font-size:17px;font-weight:700}.prose p,.prose li{color:var(--text-2)}.prose ol,.prose ul{padding-left:22px}.prose li::marker{color:var(--accent)}.formula{border-radius:var(--radius-sm);background:var(--surface-2);color:var(--text);box-shadow:inset 3px 0 0 var(--accent);padding:14px 16px;font-size:15px;font-weight:500;overflow-x:auto}.faq-item{border-bottom:1px solid var(--line)}.faq-item:last-child{border-bottom:0}.faq-item summary{cursor:pointer;padding:15px 32px 15px 0;font-weight:700;list-style:none;position:relative}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";background:var(--accent-soft);width:26px;height:26px;color:var(--accent-text);border-radius:50%;place-items:center;font-size:18px;line-height:1;display:grid;position:absolute;top:11px;right:0}.faq-item[open] summary:after{content:"−";background:var(--accent);color:#fff}.faq-a{color:var(--text-2);padding:0 0 16px}.faq-a p{margin:0 0 8px}.toast{background:var(--navy);color:#fff;box-shadow:var(--shadow);opacity:0;pointer-events:none;z-index:20;border-radius:999px;padding:11px 18px;font-size:14px;font-weight:600;transition:opacity .2s;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}.toast.show{opacity:1}:root[data-theme=dark] .toast{color:var(--navy);background:#eef0fa}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .toast{color:var(--navy);background:#eef0fa}}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}[hidden]{display:none!important}.input-wrap:has(.unit-wide) input{padding-right:62px}.field.is-disabled{opacity:.45}input:disabled,select:disabled{cursor:not-allowed}.result-actions{flex-direction:column;flex:none;align-items:flex-end;gap:6px;display:flex}@media (width>=560px){.result-actions{flex-direction:row}}.history{padding-top:18px;padding-bottom:8px}.history-head{justify-content:space-between;align-items:center;gap:8px;display:flex}.history-head h2{color:var(--text-2);align-items:center;gap:6px;margin:0;font-size:15px;font-weight:700;display:flex}.history-head h2 .icon{color:var(--accent);font-size:18px}.history-count{color:var(--text-3);font-size:13px;font-weight:600}.text-btn{color:var(--text-3);cursor:pointer;background:0 0;border:0;padding:6px 4px;font-family:inherit;font-size:13px;font-weight:600}.text-btn:hover{color:var(--danger)}.history-list{margin:8px 0 0;padding:0;list-style:none}.history-item{border-top:1px solid var(--line);align-items:center;gap:8px;display:flex}.history-load{min-width:0;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:0;flex:1;gap:2px;padding:12px 0;font-family:inherit;display:grid}.history-load:hover strong{color:var(--accent)}.history-main{align-items:baseline;gap:8px;min-width:0;display:flex}.history-main strong{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:17px;font-weight:700}.history-main span,.history-summary{color:var(--text-2);text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.history-time{color:var(--text-3);font-size:12px}.icon-btn.small{flex:none;width:34px;height:34px}.icon-btn.small svg{width:16px;height:16px}.unit-pair{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:end;gap:8px;display:grid}.unit-pair .field{margin-bottom:0}.swap-btn{border-radius:var(--radius-sm);width:46px;height:50px;margin-bottom:0}.unit-pair+.quick{margin-top:14px}#value{text-align:right}