:root{
  --main:#1d5c63; --main-2:#2a7a83; --accent:#e0a33a;
  --bg:#f3f6f6; --card:#fff; --text:#24302f; --muted:#6b7a79;
  --line:#dde5e4; --err:#c0392b; --err-bg:#fdeceb; --note-bg:#eef6f1;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Segoe UI","Hiragino Kaku Gothic ProN","Meiryo",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--main)}
.top{background:var(--main);color:#fff;padding:12px 20px;display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between}
.brand{font-weight:700;letter-spacing:.03em}
.brand .mark{color:var(--accent)}
.brand .sub{font-weight:400;font-size:.85rem;opacity:.85;margin-left:6px}
.nav{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center;font-size:.9rem}
.nav a,.nav .link{color:#fff;text-decoration:none;background:none;border:none;font:inherit;cursor:pointer;padding:0}
.nav a:hover,.nav .link:hover{text-decoration:underline}
.nav .who{opacity:.85}
.inline{display:inline}
.wrap{flex:1;width:100%;max-width:1040px;margin:0 auto;padding:28px 16px}
.foot{text-align:center;color:var(--muted);font-size:.75rem;padding:18px}
h1{font-size:1.2rem;color:var(--main);margin-bottom:16px}
h1.page{font-size:1.35rem;margin-bottom:6px}
h2{font-size:1rem;color:var(--main);margin-bottom:12px}
.lead{color:var(--muted);margin-bottom:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;margin-bottom:20px}
.card.narrow{max-width:440px;margin:24px auto}
label{display:block;font-size:.85rem;color:var(--muted);font-weight:600;margin-bottom:4px}
input[type=text],input[type=password]{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 12px;font-size:1rem;margin-bottom:14px}
input:focus{outline:none;border-color:var(--main-2);box-shadow:0 0 0 3px rgba(42,122,131,.15)}
.btn{width:100%;border:none;border-radius:9px;padding:12px;font-size:1rem;font-weight:700;background:var(--main);color:#fff;cursor:pointer}
.btn:hover{background:var(--main-2)}
.err{background:var(--err-bg);color:var(--err);border-radius:8px;padding:10px 12px;margin-bottom:14px;font-size:.9rem}
.note{background:var(--note-bg);border-radius:8px;padding:10px 12px;margin-bottom:16px;font-size:.9rem}
.hint{color:var(--muted);font-size:.82rem;margin-top:12px}
.steps{padding-left:1.3em;margin-bottom:14px;font-size:.92rem}
.qr{background:#fff;border:1px solid var(--line);border-radius:10px;width:232px;height:232px;margin:8px auto 4px;padding:6px}
.qr svg{width:100%;height:100%;display:block}
.key{display:inline-block;margin-top:4px;font-size:.95rem;letter-spacing:.06em;word-break:break-all;background:#f6f8f8;padding:4px 8px;border-radius:6px}
.group{margin-bottom:26px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.tool{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--text);transition:.15s}
a.tool:hover{border-color:var(--main-2);box-shadow:0 6px 18px rgba(29,92,99,.12);transform:translateY(-1px)}
.tool .t{font-weight:700;color:var(--main)}
.tool .d{font-size:.85rem;color:var(--muted)}
.tool.soon{background:#f7f9f9}
.tool.soon .t{color:var(--muted)}
.badge{display:inline-block;font-size:.7rem;font-weight:600;background:#e7ecec;color:var(--muted);border-radius:20px;padding:1px 8px;margin-left:4px;vertical-align:middle}
.ext{font-size:.8rem;color:var(--muted)}
.scroll{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:.85rem}
th,td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;white-space:nowrap}
th{color:var(--muted);font-weight:600}
.ops form{margin-right:6px}
.small{border:1px solid var(--line);background:#fff;border-radius:6px;padding:3px 9px;font-size:.8rem;cursor:pointer}
.small:hover{border-color:var(--main-2)}
.small.danger{color:var(--err);border-color:#f0c5c0}
@media (max-width:520px){.card{padding:18px}.brand .sub{display:block;margin-left:0}}
a.small{display:inline-block;text-decoration:none;color:var(--text);margin:2px 4px 2px 0}