:root{--font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;--color-bg: #f4f7fa;--color-surface: #ffffff;--color-surface-muted: #f7fafc;--color-surface-strong: #edf3f8;--color-border: #d6e1eb;--color-border-strong: #b4c4d3;--color-text: #14212c;--color-text-muted: #506070;--color-text-soft: #6b7c8d;--color-link: #0b4f88;--color-accent: #156d61;--color-accent-hover: #0f5a51;--color-accent-soft: #e6f4f1;--color-success: #1f7a3f;--color-warning: #9a5b00;--color-error: #b63c2f;--color-info: #0b5d94;--color-trust-bg: #eef7ff;--color-trust-border: #b8d7ee;--color-file-bg: #f0faf6;--color-file-border: #b8dfd3;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-7: 2rem;--space-8: 2.5rem;--space-9: 3rem;--space-10: 4rem;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-pill: 999px;--shadow-sm: 0 1px 2px rgba(20, 33, 44, .06);--shadow-md: 0 8px 20px rgba(20, 33, 44, .08);--border-width: 1px;--container-sm: 44rem;--container-md: 60rem;--container-lg: 70rem;--z-base: 1;--z-header: 20;--z-skip-link: 40}*{box-sizing:border-box}html,body{margin:0;padding:0}html{font-family:var(--font-sans);color:var(--color-text);background-color:var(--color-bg);text-size-adjust:100%}body{background:radial-gradient(1200px 400px at 95% -20%,#dff0ff 0%,transparent 60%),var(--color-bg);line-height:1.6}a{color:var(--color-link);text-decoration-thickness:.08em;text-underline-offset:.18em}a:hover{text-decoration-thickness:.12em}img,svg{display:block;max-width:100%}h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.01em}h1{font-size:clamp(1.75rem,4vw,2.4rem)}h2{font-size:clamp(1.25rem,2.8vw,1.7rem)}h3{font-size:clamp(1.1rem,2.4vw,1.3rem)}p,ul,ol,dl,blockquote{margin:0}ul,ol{padding-inline-start:1.2rem}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:3px solid rgba(11,79,136,.35);outline-offset:2px}.skip-link{position:absolute;left:var(--space-3);top:-100%;z-index:var(--z-skip-link);background:var(--color-surface);border:var(--border-width) solid var(--color-border-strong);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3)}.skip-link:focus-visible{top:var(--space-3)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important;scroll-behavior:auto!important}}.site-container{width:min(100% - 2rem,var(--container-lg));margin-inline:auto}.site-main{padding-bottom:var(--space-10)}.page-section{margin-block:var(--space-8)}.flow-sm>*+*{margin-top:var(--space-3)}.flow-md>*+*{margin-top:var(--space-5)}.flow-lg>*+*{margin-top:var(--space-7)}.grid{display:grid;gap:var(--space-4)}.grid-2,.grid-3{grid-template-columns:1fr}@media(min-width:48rem){.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:64rem){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}.card{background:var(--color-surface);border:var(--border-width) solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-sm)}.brand-link{color:var(--color-text);font-weight:700;text-decoration:none;font-size:1.2rem}.site-header{position:sticky;top:0;z-index:var(--z-header);padding-top:var(--space-4)}.site-header-inner{display:flex;flex-wrap:wrap;gap:var(--space-4);align-items:center;justify-content:space-between;background:#ffffffeb;backdrop-filter:blur(8px)}.main-nav,.footer-nav{display:flex;flex-wrap:wrap;gap:var(--space-3)}.main-nav a,.footer-nav a{color:var(--color-text);text-decoration:none}.main-nav a:hover,.footer-nav a:hover{color:var(--color-link)}.site-footer{margin-top:var(--space-10);margin-bottom:var(--space-6)}.footer-copy{color:var(--color-text-muted)}.button{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);min-height:2.5rem;border:var(--border-width) solid transparent;border-radius:var(--radius-md);background:var(--color-accent);color:#fff;padding:.55rem .95rem;font-weight:600;text-decoration:none;cursor:pointer}.button:hover{background:var(--color-accent-hover)}.button:disabled{opacity:.6;cursor:not-allowed}.button-secondary{background:var(--color-surface);border-color:var(--color-border-strong);color:var(--color-text)}.button-secondary:hover{background:var(--color-surface-muted)}.input,.select,.textarea{width:100%;min-height:2.6rem;border:var(--border-width) solid var(--color-border-strong);border-radius:var(--radius-md);background:var(--color-surface);padding:.55rem .75rem}.textarea{min-height:7rem;resize:vertical}.field-grid{display:grid;gap:var(--space-4)}@media(min-width:48rem){.field-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.field{display:grid;gap:var(--space-2)}.field-label{font-weight:600}.calculator-form{display:grid;gap:var(--space-4)}.calculator-actions{display:flex;flex-wrap:wrap;gap:var(--space-3)}.notice{border-left:4px solid var(--color-info);background:var(--color-surface-muted)}.notice-privacy{border-left-color:var(--color-info);background:var(--color-trust-bg);border-color:var(--color-trust-border)}.badge{display:inline-flex;align-items:center;border-radius:var(--radius-pill);border:var(--border-width) solid var(--color-border);padding:.2rem .65rem;font-size:.8rem;line-height:1.2}.badge-category{background:var(--color-surface-strong)}.badge-trust{background:var(--color-trust-bg);border-color:var(--color-trust-border)}.upload-zone{border:2px dashed var(--color-file-border);background:var(--color-file-bg);border-radius:var(--radius-md);padding:var(--space-6);text-align:center;display:grid;gap:var(--space-3)}.upload-title{font-weight:700}.image-drop-target{border:2px dashed var(--color-file-border);background:var(--color-file-bg);border-radius:var(--radius-md);padding:var(--space-5)}.image-drop-target.is-drag-over{border-color:var(--color-accent);background:var(--color-accent-soft)}.result-preview{border:var(--border-width) solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-muted);min-height:12rem;padding:var(--space-4);display:flex;align-items:center;justify-content:center}.result-preview-image{max-width:100%;max-height:20rem;border-radius:var(--radius-sm)}.result-box{border:var(--border-width) solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-muted);padding:var(--space-5)}.result-label{color:var(--color-text-soft);font-size:.9rem}.result-value{font-size:1.25rem;font-weight:700;margin-top:var(--space-2)}.result-meta{margin:0;color:var(--color-text-muted);padding-left:1.2rem}.result-meta:empty{display:none}.download-actions{display:flex;flex-wrap:wrap;gap:var(--space-3)}.breadcrumbs-wrap{margin-top:var(--space-5);margin-bottom:var(--space-4)}.breadcrumbs-list{list-style:none;display:flex;flex-wrap:wrap;gap:var(--space-2);padding:0;margin:0;color:var(--color-text-muted)}.breadcrumbs-item+.breadcrumbs-item:before{content:"/";margin-right:var(--space-2);color:var(--color-text-soft)}.faq-item{border:var(--border-width) solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4);background:var(--color-surface-muted)}.faq-item summary{cursor:pointer;font-weight:600}.faq-item p{margin-top:var(--space-3);color:var(--color-text-muted)}.related-tools-list{display:grid;gap:var(--space-2)}.list-spaced>*+*{margin-top:var(--space-2)}.tool-status{color:var(--color-text-muted);font-size:.95rem}.tool-error{color:var(--color-error)}.tool-hero p{max-width:65ch}.text-muted{color:var(--color-text-muted)}.text-soft{color:var(--color-text-soft)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.stack-sm>*+*{margin-top:var(--space-3)}.stack-md>*+*{margin-top:var(--space-5)}