:root{color-scheme:light;--ink:#15313c;--muted:#637b84;--navy:#082c3e;--teal:#118b8f;--teal-dark:#08666c;--line:#d5e3e6;--wash:#f2f7f8;--soft:#e8f4f4;--white:#fff;--warning:#fff8e7;--warning-line:#e9cc80;--danger:#b42318;--success:#16734a}
*{box-sizing:border-box}
html{font-size:16px}
body{margin:0;background:linear-gradient(180deg,#eaf4f5 0,#f7fafb 260px);color:var(--ink);font-family:Inter,"Noto Sans JP","Hiragino Sans","Yu Gothic UI","Yu Gothic",system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}
button,input,select{font:inherit}
button{cursor:pointer}
.page{width:min(1100px,calc(100% - 36px));margin:0 auto;padding:32px 0 60px}
.tool-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}
.eyebrow{margin:0 0 5px;color:var(--teal-dark);font-size:.75rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
h1{margin:0;color:var(--navy);font-size:clamp(1.9rem,4vw,2.7rem);line-height:1.1;letter-spacing:-.035em}
.lead{max-width:720px;margin:10px 0 0;color:var(--muted)}
.header-links{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.button,.header-links a{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);font-weight:700;text-decoration:none}
.button.primary{border-color:var(--teal);background:var(--teal);color:white}.button:hover,.header-links a:hover{filter:brightness(.97)}
.card{margin-bottom:16px;padding:22px;border:1px solid var(--line);border-radius:16px;background:white;box-shadow:0 8px 30px rgba(8,44,62,.055)}
.card h2{margin:0 0 16px;color:var(--navy);font-size:1.1rem}.card h3{margin:22px 0 10px;font-size:1rem}
.grid{display:grid;gap:14px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
label{display:grid;gap:6px;color:#405b65;font-size:.88rem;font-weight:700}
input,select{width:100%;min-height:43px;padding:8px 11px;border:1px solid #bed0d5;border-radius:9px;background:white;color:var(--ink);outline:0}
input:focus,select:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(17,139,143,.14)}
input:disabled,select:disabled{background:#edf2f3;color:#84969c}
.check{display:flex;align-items:center;gap:9px;margin-top:18px}.check input{width:18px;min-height:18px}
.form-actions{display:flex;align-items:center;gap:12px;margin-top:18px}.hint,.caption{color:var(--muted);font-size:.84rem}.error{display:none;margin:14px 0 0;padding:12px 14px;border:1px solid #efc6c2;border-radius:9px;background:#fff1f0;color:var(--danger);font-weight:650}.error.show{display:block}
.results[hidden]{display:none}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.metric{padding:16px;border:1px solid var(--line);border-radius:13px;background:var(--soft)}.metric span{display:block;color:var(--muted);font-size:.76rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase}.metric strong{display:block;margin-top:4px;color:var(--navy);font-size:1.45rem}
.composition{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.pill{padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--teal-dark);font-size:.85rem;font-weight:750}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}table{width:100%;border-collapse:collapse;font-size:.86rem;white-space:nowrap}th,td{padding:10px 12px;border-bottom:1px solid #e5edef;text-align:right}th:first-child,td:first-child{text-align:left}th{background:#f1f6f7;color:#48636c;font-size:.76rem;letter-spacing:.03em}tr:last-child td{border-bottom:0}
.notice{padding:14px 16px;border:1px solid var(--warning-line);border-radius:11px;background:var(--warning);font-size:.88rem}.info{border-color:#b9dbdf;background:#edf8f9}
.settings{margin-top:14px;padding:16px;border:1px solid var(--line);border-radius:12px;background:#f8fbfb}.settings[hidden]{display:none}
.loading{color:var(--muted)}
@media(max-width:720px){.page{width:min(100% - 22px,1100px);padding-top:22px}.tool-header{display:block}.header-links{justify-content:flex-start;margin-top:15px}.grid.two,.grid.three,.metrics{grid-template-columns:1fr}.card{padding:16px}table{font-size:.8rem}}