:root{--bg: #f7f8fa;--surface: #ffffff;--text: #1f2530;--text-sub: #5b6472;--border: #e3e7ee;--accent: #0f7b8a;--accent-strong: #0b6271;--accent-soft: #e3f3f5;--danger: #c2473d;--radius: 10px;--shadow: 0 1px 3px rgba(20, 30, 50, .07)}@media(prefers-color-scheme:dark){:root{--bg: #14181f;--surface: #1d232c;--text: #e8ecf2;--text-sub: #9aa4b2;--border: #313a46;--accent: #4fc3d4;--accent-strong: #6fd3e2;--accent-soft: #1d3a40;--shadow: 0 1px 3px rgba(0, 0, 0, .4)}}*{box-sizing:border-box}html{font-family:system-ui,-apple-system,Segoe UI,Hiragino Kaku Gothic ProN,Hiragino Sans,BIZ UDPGothic,Meiryo,sans-serif;line-height:1.75;color:var(--text);background:var(--bg);-webkit-text-size-adjust:100%}body{margin:0;min-height:100vh;display:flex;flex-direction:column}main{flex:1;width:100%;max-width:860px;margin:0 auto;padding:1.5rem 1rem 3rem}a{color:var(--accent)}h1{font-size:1.6rem;line-height:1.4;margin:.5rem 0 .75rem}h2{font-size:1.2rem;margin:2.2rem 0 .6rem;padding-left:.6rem;border-left:4px solid var(--accent)}h3{font-size:1.02rem;margin:1.2rem 0 .4rem}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.site-header__inner{max-width:860px;margin:0 auto;padding:.7rem 1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.site-header__brand{font-weight:700;font-size:1.1rem;color:var(--text);text-decoration:none}.site-header__brand span{color:var(--accent)}.site-header__nav{display:flex;gap:.9rem;font-size:.88rem}.site-header__nav a{color:var(--text-sub);text-decoration:none}.site-header__nav a:hover{color:var(--accent)}.site-footer{background:var(--surface);border-top:1px solid var(--border);margin-top:2rem;font-size:.85rem;color:var(--text-sub)}.site-footer__inner{max-width:860px;margin:0 auto;padding:1.2rem 1rem 1.6rem}.site-footer__links{display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;margin-bottom:.6rem}.site-footer__links a{color:var(--text-sub)}.breadcrumb{font-size:.82rem;color:var(--text-sub);margin-bottom:.2rem}.breadcrumb a{color:var(--text-sub)}.tool-lead{color:var(--text-sub);font-size:.95rem;margin:0 0 1.2rem}.tool-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem;margin-bottom:1rem}.privacy-note{display:flex;align-items:center;gap:.5rem;font-size:.82rem;color:var(--text-sub);background:var(--accent-soft);border-radius:var(--radius);padding:.55rem .8rem;margin:0 0 1.5rem}label{font-size:.9rem}textarea,input[type=text],input[type=number],input[type=date],select{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.5rem .65rem;width:100%}textarea{min-height:10rem;resize:vertical}textarea:focus,input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px}button{font:inherit;cursor:pointer}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.55rem 1.2rem;font-weight:600}.btn:hover{background:var(--accent-strong)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}.btn--ghost:hover{background:var(--accent-soft);color:var(--accent)}.btn--sm{padding:.3rem .7rem;font-size:.85rem;font-weight:500}.field-row{display:flex;flex-wrap:wrap;gap:.8rem 1.4rem;align-items:center;margin:.8rem 0}.field-row label{display:flex;align-items:center;gap:.4rem}.field-row input[type=number],.field-row select{width:auto}.check-row{display:flex;flex-wrap:wrap;gap:.3rem 1.2rem;margin:.6rem 0}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:2.2rem 1rem;text-align:center;color:var(--text-sub);cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.is-over{border-color:var(--accent);background:var(--accent-soft)}.dropzone p{margin:.2rem 0}.dropzone .dropzone__hint{font-size:.8rem}.file-list{list-style:none;margin:1rem 0 0;padding:0;display:flex;flex-direction:column;gap:.5rem}.file-list li{display:flex;align-items:center;gap:.6rem;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.5rem .7rem;font-size:.88rem}.file-list .file-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-list .file-meta{color:var(--text-sub);font-size:.8rem;white-space:nowrap}.file-list .file-meta--gain{color:var(--accent);font-weight:600}.result-area{margin-top:1rem}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.6rem;margin:.5rem 0}.stat-card{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.6rem .8rem}.stat-card .stat-label{font-size:.78rem;color:var(--text-sub)}.stat-card .stat-value{font-size:1.25rem;font-weight:700;font-variant-numeric:tabular-nums}.error-msg{color:var(--danger);font-size:.88rem;margin:.6rem 0 0;white-space:pre-wrap}.hero{text-align:center;padding:1.6rem 0 .6rem}.hero h1{font-size:1.7rem}.hero p{color:var(--text-sub);max-width:600px;margin:0 auto}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:.8rem;margin:.8rem 0 0}.tool-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:.9rem 1rem;text-decoration:none;color:var(--text);transition:border-color .15s,transform .15s}.tool-card:hover{border-color:var(--accent);transform:translateY(-2px)}.tool-card__title{font-weight:700;margin-bottom:.2rem}.tool-card__desc{font-size:.82rem;color:var(--text-sub)}.tool-article ol,.tool-article ul{padding-left:1.4rem}.tool-article li{margin:.3rem 0}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.8rem 1rem;margin:.6rem 0}.faq-item dt{font-weight:700;margin-bottom:.3rem}.faq-item dd{margin:0;color:var(--text-sub);font-size:.92rem}.related-tools{margin-top:.6rem}.prose{font-size:.95rem}.prose h2{font-size:1.15rem}table{border-collapse:collapse;width:100%;font-size:.9rem;margin:.6rem 0}th,td{border:1px solid var(--border);padding:.45rem .65rem;text-align:left}th{background:var(--bg);white-space:nowrap}@media(max-width:600px){h1{font-size:1.35rem}.site-header__nav{display:none}}