@import "https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css";:root{color-scheme:light;--bg-app:#f8fafc;--bg-surface:#fff;--bg-surface-elevated:#fff;--bg-subtle:#f1f5f9;--bg-glass:#ffffffd9;--bg-glass-card:#fffc;--bg-hero-glow:radial-gradient(circle at 50% -20%, #3b82f61f 0%, #f8fafc00 70%);--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#64748b;--text-muted:#94a3b8;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-active:#1e40af;--primary-subtle:#2563eb14;--primary-subtle-hover:#2563eb24;--primary-border:#2563eb38;--primary-gradient:linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);--primary-glow:#3b82f640;--border-subtle:#f1f5f9;--border-default:#e2e8f0;--border-hover:#cbd5e1;--border-focus:#3b82f6;--shadow-xs:0 1px 2px 0 #0f172a0a;--shadow-sm:0 2px 4px 0 #0f172a0d;--shadow-md:0 6px 16px -2px #0f172a12, 0 2px 4px -2px #0f172a0a;--shadow-lg:0 16px 32px -6px #0f172a1a, 0 6px 12px -4px #0f172a0d;--shadow-glow:0 0 25px -5px #3b82f640;--badge-calc-bg:#eff6ff;--badge-calc-text:#1d4ed8;--badge-calc-border:#bfdbfe;--badge-health-bg:#ecfdf5;--badge-health-text:#047857;--badge-health-border:#a7f3d0;--badge-convert-bg:#fff7ed;--badge-convert-text:#c2410c;--badge-convert-border:#fed7aa;--radius-sm:8px;--radius-md:12px;--radius-lg:18px;--radius-xl:24px;--radius-pill:9999px;--font-sans:Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, "Helvetica Neue", "Segoe UI", sans-serif;--font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace}[data-theme=dark]{color-scheme:dark;--bg-app:#0b0f19;--bg-surface:#111827;--bg-surface-elevated:#1f2937;--bg-subtle:#1e293b;--bg-glass:#111827d9;--bg-glass-card:#111827bf;--bg-hero-glow:radial-gradient(circle at 50% -20%, #60a5fa26 0%, #0b0f1900 70%);--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-tertiary:#94a3b8;--text-muted:#64748b;--primary:#60a5fa;--primary-hover:#3b82f6;--primary-active:#2563eb;--primary-subtle:#60a5fa24;--primary-subtle-hover:#60a5fa38;--primary-border:#60a5fa59;--primary-gradient:linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);--primary-glow:#60a5fa4d;--border-subtle:#1e293b;--border-default:#334155;--border-hover:#475569;--border-focus:#60a5fa;--shadow-xs:0 1px 2px 0 #0006;--shadow-sm:0 2px 4px 0 #0006;--shadow-md:0 8px 20px -2px #00000080, 0 2px 6px -2px #0000004d;--shadow-lg:0 20px 40px -6px #0009, 0 8px 16px -4px #0006;--shadow-glow:0 0 30px -5px #60a5fa4d;--badge-calc-bg:#1e3a8a73;--badge-calc-text:#93c5fd;--badge-calc-border:#93c5fd40;--badge-health-bg:#064e3b73;--badge-health-text:#6ee7b7;--badge-health-border:#6ee7b740;--badge-convert-bg:#7c2d1273;--badge-convert-text:#fdba74;--badge-convert-border:#fdba7440}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;width:100%;overflow-x:clip}body{min-height:100vh;color:var(--text-primary);background-color:var(--bg-app);word-break:keep-all;flex-direction:column;width:100%;max-width:100vw;margin:0;line-height:1.6;transition:background-color .3s,color .3s;display:flex;overflow-x:clip}main{flex:1}a{color:inherit;-webkit-tap-highlight-color:transparent;text-decoration:none;transition:color .2s}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;-webkit-tap-highlight-color:transparent}button{cursor:pointer;touch-action:manipulation;background:0 0;border:none}.container{width:min(1180px,100% - 32px);margin-inline:auto}.site-header{z-index:50;border-bottom:1px solid var(--border-default);background:var(--bg-glass);-webkit-backdrop-filter:blur(16px);transition:background-color .3s,border-color .3s;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:20px;min-height:72px;display:flex}.brand{color:var(--text-primary);letter-spacing:-.03em;align-items:center;gap:10px;font-size:1.25rem;font-weight:800;transition:transform .2s;display:flex}.brand:hover{transform:translateY(-1px)}.brand-logo{border-radius:var(--radius-md);background:var(--primary-gradient);color:#fff;justify-content:center;align-items:center;width:34px;height:34px;display:flex;box-shadow:0 4px 12px #3b82f659}.header-actions{align-items:center;gap:20px;display:flex}nav{align-items:center;gap:6px;font-size:.92rem;font-weight:600;display:flex}nav a{border-radius:var(--radius-pill);color:var(--text-secondary);padding:8px 14px;transition:all .2s}nav a:hover{color:var(--primary);background:var(--primary-subtle)}.theme-toggle-btn{border-radius:var(--radius-pill);border:1px solid var(--border-default);background:var(--bg-surface);width:40px;height:40px;color:var(--text-secondary);box-shadow:var(--shadow-xs);justify-content:center;align-items:center;transition:all .2s;display:flex;position:relative;overflow:hidden}.theme-toggle-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-subtle);transform:scale(1.05)}.theme-toggle-btn:active{transform:scale(.95)}.theme-toggle-btn svg{width:20px;height:20px;transition:transform .4s cubic-bezier(.34,1.56,.64,1),opacity .2s}.theme-toggle-btn .sun-icon{display:none}.theme-toggle-btn .moon-icon,[data-theme=dark] .theme-toggle-btn .sun-icon{display:block}[data-theme=dark] .theme-toggle-btn .moon-icon{display:none}.mobile-menu-btn{border-radius:var(--radius-pill);border:1px solid var(--border-default);background:var(--bg-surface);width:40px;height:40px;color:var(--text-secondary);box-shadow:var(--shadow-xs);justify-content:center;align-items:center;transition:all .2s;display:none;position:relative;overflow:hidden}.mobile-menu-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-subtle);transform:scale(1.05)}.mobile-menu-btn:active{transform:scale(.95)}.mobile-menu-btn svg{width:20px;height:20px;transition:transform .3s}.mobile-menu-btn .menu-close-icon,.mobile-menu-btn[aria-expanded=true] .menu-open-icon{display:none}.mobile-menu-btn[aria-expanded=true] .menu-close-icon{display:block}.hero{border-bottom:1px solid var(--border-default);background-color:var(--bg-surface);background-image:var(--bg-hero-glow);transition:background-color .3s,border-color .3s;position:relative}.hero-inner{z-index:1;max-width:840px;padding:clamp(64px,10vw,100px) 0 clamp(56px,8vw,90px);position:relative}.eyebrow{border-radius:var(--radius-pill);border:1px solid var(--primary-border);background:var(--primary-subtle);width:fit-content;color:var(--primary);letter-spacing:.02em;white-space:nowrap;align-items:center;gap:6px;margin:0 0 14px;padding:4px 12px;font-size:.78rem;font-weight:700;line-height:1.2;display:inline-flex}h1,h2,h3{color:var(--text-primary);letter-spacing:-.035em;line-height:1.25}h1{max-width:760px;margin:0;font-size:clamp(2.4rem,5.5vw,4.2rem);font-weight:800}h1 .hero-highlight{background:var(--primary-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.hero-inner>p:not(.eyebrow){max-width:600px;color:var(--text-secondary);margin:20px 0 36px;font-size:clamp(1.05rem,2vw,1.2rem);font-weight:400;line-height:1.6}.search-box-wrapper{max-width:680px;position:relative}.search-box{border:1px solid var(--border-default);border-radius:var(--radius-xl);background:var(--bg-surface);width:100%;min-height:64px;box-shadow:var(--shadow-lg);align-items:center;gap:12px;padding:0 16px 0 20px;transition:all .2s;display:flex}.search-box:focus-within{border-color:var(--primary);box-shadow:var(--shadow-lg), var(--shadow-glow)}.search-icon{color:var(--primary);justify-content:center;align-items:center;display:flex}.search-box input{min-width:0;color:var(--text-primary);background:0 0;border:0;outline:0;flex:1;font-size:1.05rem;font-weight:500}.search-box input[type=search]::-webkit-search-decoration{appearance:none;display:none}.search-box input[type=search]::-webkit-search-cancel-button{appearance:none;display:none}.search-box input[type=search]::-webkit-search-results-button{appearance:none;display:none}.search-box input[type=search]::-webkit-search-results-decoration{appearance:none;display:none}.search-box input[type=search]::-ms-clear{width:0;height:0;display:none}.search-box input[type=search]::-ms-reveal{width:0;height:0;display:none}.search-clear-btn{background:var(--bg-subtle);width:28px;height:28px;color:var(--text-tertiary);border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:none}.search-clear-btn:hover{background:var(--border-default);color:var(--text-primary)}.search-hint{border-radius:var(--radius-sm);border:1px solid var(--border-default);background:var(--bg-subtle);color:var(--text-tertiary);font-size:.78rem;font-family:var(--font-mono);white-space:nowrap;padding:4px 10px;font-weight:600}.tools-section{padding-block:clamp(52px,7vw,96px)}.section-heading{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:32px;display:flex}.section-heading h2,.content-section h2,.related-tools-section h2{margin:0;font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800}.filter-row{flex-wrap:wrap;gap:10px;margin-bottom:32px;display:flex}.filter{border:1px solid var(--border-default);border-radius:var(--radius-pill);background:var(--bg-surface);min-height:44px;color:var(--text-secondary);box-shadow:var(--shadow-xs);align-items:center;gap:8px;padding:8px 20px;font-size:.92rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex}.filter:hover{border-color:var(--primary-border);color:var(--primary);background:var(--primary-subtle);transform:translateY(-1px)}.filter.active{border-color:var(--primary);background:var(--primary-gradient);color:#fff;box-shadow:0 4px 14px #3b82f659}.tool-grid{grid-template-columns:repeat(3,1fr);gap:22px;display:grid}.tool-card{border:1px solid var(--border-default);border-radius:var(--radius-xl);background:var(--bg-surface);height:100%;box-shadow:var(--shadow-sm);flex-direction:column;padding:28px;transition:transform .25s cubic-bezier(.16,1,.3,1),box-shadow .25s,border-color .25s;display:flex;position:relative;overflow:hidden}.tool-card:hover{border-color:var(--primary-border);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.tool-card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.tool-card-header-right{align-items:center;gap:8px;display:flex}.category-tag{border-radius:var(--radius-pill);white-space:nowrap;border:1px solid #0000;align-items:center;gap:6px;width:fit-content;padding:4px 12px;font-size:.78rem;font-weight:700;line-height:1.2;display:inline-flex}.category-tag.calculator{background:var(--badge-calc-bg);color:var(--badge-calc-text);border-color:var(--badge-calc-border)}.category-tag.health{background:var(--badge-health-bg);color:var(--badge-health-text);border-color:var(--badge-health-border)}.category-tag.convert{background:var(--badge-convert-bg);color:var(--badge-convert-text);border-color:var(--badge-convert-border)}.tool-card-arrow-icon{color:var(--text-tertiary);transition:transform .25s,color .25s}.tool-card:hover .tool-card-arrow-icon{color:var(--primary);transform:translate(2px,-2px)}.tool-card h3{margin:0 0 10px;font-size:1.35rem;font-weight:800}.tool-card h3 a{color:var(--text-primary)}.tool-card h3 a:after{content:"";position:absolute;inset:0}.tool-card p:not(.eyebrow){color:var(--text-secondary);flex:1;margin:0 0 24px;font-size:.95rem;line-height:1.6}.tool-card-footer{justify-content:space-between;align-items:center;margin-top:auto;display:flex}.text-link{color:var(--primary);align-items:center;gap:6px;font-size:.92rem;font-weight:700;transition:gap .2s;display:inline-flex}.tool-card:hover .text-link svg{transform:translate(4px)}.text-link svg{transition:transform .2s}.tool-hero-backdrop{background-color:var(--bg-surface);background-image:var(--bg-hero-glow);border-bottom:1px solid var(--border-default);padding:24px 0 48px;transition:background-color .3s,border-color .3s;position:relative}.breadcrumb-nav{color:var(--text-tertiary);align-items:center;gap:8px;margin-bottom:28px;font-size:.88rem;font-weight:500;display:flex}.breadcrumb-item{color:var(--text-secondary);align-items:center;gap:5px;transition:color .2s;display:inline-flex}.breadcrumb-item:hover{color:var(--primary)}.breadcrumb-item.active{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;font-weight:700;overflow:hidden}.breadcrumb-separator{color:var(--text-muted);flex-shrink:0}.tool-hero{grid-template-columns:1.1fr .9fr;align-items:center;gap:36px;display:grid}.tool-hero-meta{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.tool-hero-content h1{letter-spacing:-.04em;margin:14px 0 16px;font-size:clamp(2.2rem,4.5vw,3.4rem);font-weight:800}.tool-lead{color:var(--text-secondary);margin:0;font-size:clamp(1.05rem,2vw,1.18rem);line-height:1.65}.direct-answer-card{border-radius:var(--radius-xl);border:1px solid var(--primary-border);background:var(--bg-glass-card);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-md);flex-direction:column;gap:16px;padding:26px;display:flex;position:relative;overflow:hidden}.direct-answer-card:before{content:"";background:var(--primary-gradient);width:4px;height:100%;position:absolute;top:0;left:0}.direct-answer-header{justify-content:space-between;align-items:center;display:flex}.direct-answer-pill{border-radius:var(--radius-pill);background:var(--primary-subtle);color:var(--primary);letter-spacing:.02em;align-items:center;gap:6px;padding:4px 12px;font-size:.82rem;font-weight:800;display:inline-flex}.direct-answer-text{color:var(--text-primary);margin:0;font-size:.98rem;font-weight:600;line-height:1.65}.direct-answer-badges{border-top:1px dashed var(--border-default);flex-wrap:wrap;gap:8px;margin-top:4px;padding-top:14px;display:flex}.feature-badge{border-radius:var(--radius-sm);background:var(--bg-subtle);color:var(--text-tertiary);align-items:center;gap:5px;padding:3px 10px;font-size:.78rem;font-weight:600;display:inline-flex}.tool-main-content{padding-block:clamp(40px,6vw,80px)}.calculator-section-wrapper{margin-bottom:48px}.calculator-card{border:1px solid var(--border-default);border-radius:var(--radius-xl);background:var(--bg-surface);box-shadow:var(--shadow-lg);padding:clamp(28px,4.5vw,44px);transition:background-color .3s,border-color .3s,box-shadow .3s;position:relative;overflow:hidden}.calculator-header{border-bottom:1px solid var(--border-subtle);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:28px;padding-bottom:18px;display:flex}.calculator-header-actions{align-items:center;gap:10px;display:flex}.calculator-title{margin:0;font-size:clamp(1.4rem,2.5vw,1.85rem);font-weight:800}.calculator-status{border-radius:var(--radius-pill);background:var(--bg-subtle);color:var(--text-tertiary);align-items:center;gap:8px;padding:4px 12px;font-size:.8rem;font-weight:700;display:inline-flex}.pulse-dot{background-color:#10b981;border-radius:50%;width:8px;height:8px;animation:2s infinite pulseDot;box-shadow:0 0 #10b981b3}@keyframes pulseDot{0%{transform:scale(.95);box-shadow:0 0 #10b981b3}70%{transform:scale(1);box-shadow:0 0 0 6px #10b98100}to{transform:scale(.95);box-shadow:0 0 #10b98100}}.calculator-form{gap:24px;display:grid}.field-group{gap:22px;display:grid}.field label{color:var(--text-primary);margin-bottom:8px;font-size:.92rem;font-weight:700;display:block}.label-row{justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.label-row label{margin-bottom:0}.preset-chips{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.chip-btn{border-radius:var(--radius-pill);border:1px solid var(--border-default);background:var(--bg-subtle);color:var(--text-secondary);padding:3px 10px;font-size:.78rem;font-weight:700;transition:all .2s}.chip-btn:hover{border-color:var(--primary-border);color:var(--primary);background:var(--primary-subtle);transform:translateY(-1px)}.vat-mode-selector{margin-bottom:8px}.mode-chips{background:var(--bg-subtle);border-radius:var(--radius-md);border:1px solid var(--border-default);gap:8px;padding:4px;display:flex}.mode-chip-btn{border-radius:calc(var(--radius-md) - 2px);color:var(--text-secondary);cursor:pointer;text-align:center;background:0 0;border:1px solid #0000;flex:1;padding:10px 14px;font-size:.88rem;font-weight:700;transition:all .2s}.mode-chip-btn:hover{color:var(--primary);background:#6366f10d}.mode-chip-btn.active{background:var(--bg-surface-elevated,#fff);color:var(--primary);border-color:var(--primary-border);box-shadow:0 1px 3px #00000014}[data-theme=dark] .mode-chip-btn.active{background:var(--bg-surface-elevated,#1f2937);color:var(--primary);border-color:var(--primary-border)}.input-with-suffix{border:1px solid var(--border-default);border-radius:var(--radius-md);background:var(--bg-app);align-items:center;min-height:54px;transition:all .2s;display:flex;overflow:hidden}.input-with-suffix:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow);background:var(--bg-surface)}.input-with-suffix input{min-width:0;height:100%;color:var(--text-primary);background:0 0;border:0;outline:0;flex:1;padding:12px 18px;font-size:1.1rem;font-weight:600}.input-with-suffix span{background:var(--bg-subtle);color:var(--text-secondary);border-left:1px solid var(--border-default);user-select:none;white-space:nowrap;justify-content:center;align-self:stretch;align-items:center;padding:0 18px;font-size:.92rem;font-weight:700;display:inline-flex}.unit-converter-wrapper{grid-template-columns:1fr auto 1fr;align-items:flex-end;gap:16px;display:grid}.swap-units-btn{border:1px solid var(--border-default);background:var(--bg-subtle);width:46px;height:46px;color:var(--text-secondary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-bottom:3px;transition:all .25s;display:flex}.swap-units-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-subtle);transform:rotate(180deg)scale(1.08)}select{border:1px solid var(--border-default);border-radius:var(--radius-md);background:var(--bg-app);width:100%;min-height:54px;color:var(--text-primary);cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2064748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-position:right 18px center;background-repeat:no-repeat;outline:0;padding:12px 44px 12px 18px;font-size:1rem;font-weight:600;transition:all .2s}select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow);background-color:var(--bg-surface)}.form-error{color:#ef4444;min-height:1.4em;margin:-6px 0 0;font-size:.88rem;font-weight:600}.calc-action-row{align-items:center;gap:12px;display:flex}.calc-submit-btn{border-radius:var(--radius-md);background:var(--primary-gradient);color:#fff;flex:1;justify-content:center;align-items:center;gap:8px;min-height:54px;padding:14px 28px;font-size:1.05rem;font-weight:700;transition:all .2s;display:inline-flex;box-shadow:0 4px 14px #3b82f659}.calc-submit-btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px #3b82f673}.calc-submit-btn:active{transform:translateY(0)}.calc-reset-btn{border-radius:var(--radius-md);border:1px solid var(--border-default);background:var(--bg-subtle);min-height:54px;color:var(--text-secondary);align-items:center;gap:6px;padding:0 20px;font-size:.92rem;font-weight:600;transition:all .2s;display:inline-flex}.calc-reset-btn:hover{border-color:var(--border-hover);color:var(--text-primary);background:var(--border-default)}.result-card{border:1px solid var(--primary-border);border-radius:var(--radius-xl);background:var(--primary-subtle);flex-direction:column;gap:18px;margin-top:32px;padding:26px 30px;transition:all .3s;display:flex;position:relative}.result-header{justify-content:space-between;align-items:center;display:flex}.result-badge{color:var(--primary);text-transform:uppercase;letter-spacing:.04em;align-items:center;gap:6px;font-size:.85rem;font-weight:800;display:inline-flex}.copy-result-btn{border-radius:var(--radius-pill);border:1px solid var(--border-default);background:var(--bg-surface);color:var(--text-secondary);align-items:center;gap:6px;padding:7px 14px;font-size:.84rem;font-weight:700;transition:all .2s;display:inline-flex}.copy-result-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}.copy-result-btn.copied{color:#047857;background:#ecfdf5;border-color:#10b981}[data-theme=dark] .copy-result-btn.copied{color:#6ee7b7;background:#064e3b73}.result-main strong{color:var(--text-primary);font-variant-numeric:tabular-nums;font-size:clamp(1.4rem,3.8vw,2.2rem);font-weight:800;line-height:1.25;display:block}.discount-breakdown{border-top:1px dashed var(--primary-border);grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;padding-top:18px;display:grid}.breakdown-item{flex-direction:column;gap:4px;display:flex}.breakdown-label{color:var(--text-tertiary);font-size:.82rem;font-weight:700}.breakdown-val{font-variant-numeric:tabular-nums;font-size:1.2rem;font-weight:800}.discount-amount .breakdown-val{color:#10b981}.final-amount .breakdown-val,.vat-total .breakdown-val{color:var(--primary)}.vat-supply .breakdown-val{color:var(--text-primary)}.vat-tax .breakdown-val{color:#10b981}.vat-breakdown{border-top:1px dashed var(--primary-border);grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:16px;padding-top:18px;display:grid}.field-row-2col{grid-template-columns:1fr 1fr;gap:16px;display:grid}@media 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