:root{--main:#2e7d4f;--main-dark:#1f5c39;--bg:#f7f5f0;--card:#fff;--text:#222;--muted:#666;--accent:#fff3d6;--border:#ddd6c8}
*{box-sizing:border-box}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
header.site{background:var(--main);color:#fff;padding:14px 16px}
header.site .logo{font-size:20px;font-weight:700;color:#fff;text-decoration:none}
header.site .tagline{font-size:12px;opacity:.9}
nav.main{background:var(--main-dark);padding:8px 16px;display:flex;flex-wrap:wrap;gap:6px 14px}
nav.main a{color:#fff;text-decoration:none;font-size:14px}
main{max-width:760px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px;margin:0 0 16px}
h1{font-size:22px;margin:8px 0 12px}
h2{font-size:18px;margin:16px 0 8px}
.tool-list{display:grid;gap:12px}
.tool-item{display:block;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:14px 16px;text-decoration:none;color:var(--text)}
.tool-item b{color:var(--main-dark);font-size:17px}
label{display:block;font-weight:600;margin:12px 0 4px;font-size:14px}
input,select{width:100%;padding:10px;font-size:16px;border:1px solid #bbb;border-radius:8px;background:#fff}
button.calc{width:100%;margin-top:18px;padding:14px;font-size:17px;font-weight:700;color:#fff;background:var(--main);border:none;border-radius:8px;cursor:pointer}
button.calc:active{background:var(--main-dark)}
.error{color:#b00020;font-weight:600;min-height:1.2em}
.result{display:none;background:var(--accent);border:1px solid var(--border);border-radius:10px;padding:14px 16px;margin-top:16px}
.result-table{width:100%;border-collapse:collapse}
.result-table th,.result-table td{border-bottom:1px solid var(--border);padding:8px 4px;text-align:left;font-size:15px}
.result-table td{text-align:right;white-space:nowrap}
.notes{font-size:13px;color:#444}
.disclaimer{background:#fdf0f0;border:1px solid #e3c2c2;border-radius:10px;padding:12px 16px;font-size:14px}
.aff-box{border:2px dashed #c9a227;background:#fffbe8;border-radius:10px;padding:14px 16px;margin:16px 0;font-size:14px}
.aff-box .pr{display:inline-block;background:#c9a227;color:#fff;font-size:11px;padding:1px 8px;border-radius:4px;margin-bottom:6px}
.aff-box a{color:#888;pointer-events:none;text-decoration:none}
.source-note{font-size:12px;color:var(--muted)}
footer.site{border-top:1px solid var(--border);margin-top:24px;padding:16px;font-size:13px;color:var(--muted);text-align:center}
footer.site a{color:var(--muted)}
.small{font-size:13px;color:var(--muted)}
table.plain{width:100%;border-collapse:collapse;font-size:14px}
table.plain th,table.plain td{border:1px solid var(--border);padding:6px 8px;text-align:left}