:root{--bg:#f6f7f9;--text:#1c2430;--muted:#5c6673;--accent:#1f6f8b;--accent-dark:#17566c;--accent-light:#e5eff2;--card:#fff;--border:#e0e5ea;--warn:#8a5510;--warn-bg:#fbf1e3;--ok:#1f7a52;--ok-bg:#e4f2ea;--maxw:760px}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:'Hiragino Kaku Gothic ProN','Yu Gothic','Segoe UI',-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
.container{max-width:var(--maxw);margin:0 auto;padding:0 18px}
a{color:var(--accent-dark)}
/* 広告表記 bar: must be in the first view on mobile (A8 requirement) */
.adbar{background:#eef2f4;padding:7px 16px;font-size:12px;color:var(--muted);text-align:center;border-bottom:1px solid var(--border)}
.adbar a{color:var(--accent-dark);margin-left:4px}
nav.site{padding:11px 16px;border-bottom:1px solid var(--border);font-size:14px;background:var(--card)}
nav.site .inner{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center}
nav.site a.brand{color:var(--text);text-decoration:none;font-weight:700}
nav.site .links{margin-left:auto;font-size:13px}
nav.site .links a{color:var(--muted);text-decoration:none;margin-left:14px}
header.hero{padding:36px 0 24px;border-bottom:1px solid var(--border)}
header.hero h1{font-size:24px;font-weight:700;letter-spacing:-.3px;margin-bottom:8px}
header.hero p{color:var(--muted);font-size:15px}
h2{font-size:19px;font-weight:700;margin:26px 0 10px}
h3{font-size:16px;font-weight:700;margin:18px 0 8px}
p{margin-bottom:12px}
.muted{color:var(--muted)}.small{font-size:13px}
article{padding:26px 0;font-size:15.5px}
article ul,article ol{margin:0 0 14px 22px}article li{margin-bottom:7px}
article table{width:100%;border-collapse:collapse;font-size:14px;margin:0 0 16px}
article th,article td{border:1px solid var(--border);padding:7px 9px;text-align:left}
article th{background:var(--accent-light)}
.note{background:var(--accent-light);border-left:3px solid var(--accent);border-radius:8px;padding:12px 14px;margin:14px 0;font-size:14px}
.note.warn{background:var(--warn-bg);border-left-color:var(--warn)}
.note.warn strong{color:var(--warn)}
.note.ok{background:var(--ok-bg);border-left-color:var(--ok)}
.taxbox{background:#f0f4f6;border:1px dashed #bcccd4;border-radius:8px;padding:12px 14px;margin:16px 0;font-size:13px;color:var(--muted)}
/* tools */
.tool{padding:18px 0}
.field{margin-bottom:18px}
.field label,.field .q{display:block;font-size:13px;font-weight:700;color:var(--text);margin-bottom:7px}
.field .hint{font-size:12px;color:var(--muted);font-weight:400;margin-bottom:7px}
.opts{display:flex;gap:7px;flex-wrap:wrap}
.opt{padding:8px 14px;border:2px solid var(--border);border-radius:8px;cursor:pointer;font-size:13px;background:var(--card);font-weight:500}
.opt:hover{border-color:var(--accent)}.opt.active{border-color:var(--accent);background:var(--accent-light);color:var(--accent-dark)}
input.num,select.sel{padding:9px 11px;border:2px solid var(--border);border-radius:8px;font-size:15px;background:var(--card);max-width:100%}
input.num{width:190px}select.sel{min-width:200px}
.btn{display:block;width:100%;padding:13px;border:none;border-radius:9px;background:var(--accent);color:#fff;font-size:16px;font-weight:700;cursor:pointer;margin-top:6px}
.btn:hover{background:var(--accent-dark)}
.results{display:none;padding:8px 0 4px}.results.show{display:block}
.rcard{background:var(--accent);color:#fff;border-radius:12px;padding:22px 24px;margin-bottom:14px}
.rcard .k{font-size:13px;opacity:.85}.rcard .v{font-size:30px;font-weight:800;letter-spacing:-.5px;margin-top:2px}
.rcard .sub{font-size:13px;opacity:.9;margin-top:6px}
table.items{width:100%;border-collapse:collapse;font-size:13.5px;margin:6px 0}
table.items th,table.items td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--border);vertical-align:top}
table.items th{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.3px}
table.items td.amt{text-align:right;font-weight:700;white-space:nowrap}
table.items tr.best td{background:var(--ok-bg)}
.verdict{border-radius:12px;padding:18px 20px;margin:14px 0;color:#fff;background:var(--accent)}
.verdict.a{background:var(--ok)}.verdict.b{background:#3f5b8b}
.verdict .v{font-size:19px;font-weight:800;margin-bottom:5px}
.lastverified{font-size:12px;color:var(--muted);margin-top:6px}
/* affiliate slots: hidden until the A8_LINK placeholder is replaced with a real URL */
.aff-slot{display:none;margin:4px 0}
.aff-slot.live{display:inline-block}
.aff-slot a,.aff-cta{display:inline-block;background:var(--accent);color:#fff;padding:9px 16px;border-radius:8px;text-decoration:none;font-size:14px;font-weight:600}
.aff-slot a:hover{background:var(--accent-dark)}
.aff-box{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:14px 16px;margin:14px 0}
.aff-box .lead{font-size:14px;margin-bottom:8px}
.bridgead{background:#eef2f4;border:1px solid var(--border);border-radius:10px;padding:14px 16px;margin:22px 0 6px;font-size:13.5px}
.bridgead b{color:var(--accent-dark)}
.related{padding:20px 0;border-top:1px solid var(--border)}.related a{font-weight:600;text-decoration:none}
.faq-item{border-bottom:1px solid var(--border);padding:14px 0}.faq-item h3{margin:0 0 6px;font-size:15px}
footer{padding:22px 0;border-top:1px solid var(--border);font-size:12px;color:var(--muted)}
footer a{color:var(--muted)}footer p{margin-bottom:5px}
@media(max-width:480px){header.hero h1{font-size:21px}.rcard .v{font-size:25px}input.num{width:100%}}