:root{--paper:#fbfaf8;--panel:#fff;--ink:#1b1e24;--ink-soft:#5a6169;--line:#e4e0d8;--accent:#2f5d6b;--alert:#b0592a;--alert-bg:#fbf0e8}@media (prefers-color-scheme:dark){:root{--paper:#14161a;--panel:#1c1f25;--ink:#e8e6e1;--ink-soft:#a8aeb6;--line:#2e333b;--accent:#6fa8b6;--alert:#d8834f;--alert-bg:#2a1f19}}*{box-sizing:border-box}body{background:var(--paper);min-height:100dvh;color:var(--ink);-webkit-font-smoothing:antialiased;place-items:center;margin:0;padding:1.5rem;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Yu Gothic,sans-serif;line-height:1.75;display:grid}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;width:100%;max-width:26rem;padding:1.75rem 1.6rem 1.9rem}.service{letter-spacing:.06em;color:var(--ink-soft);margin:0 0 .7rem;font-size:.78rem}h1{text-wrap:balance;margin:0 0 .7rem;font-size:1.25rem;line-height:1.5}p{color:var(--ink-soft);margin:0 0 1rem;font-size:.95rem}p:last-child{margin-bottom:0}.btn{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:8px;padding:.7rem 1.5rem;font-family:inherit;font-size:.95rem;font-weight:700;text-decoration:none;display:inline-block}.btn:disabled{opacity:.55;cursor:default}.btn-row{margin:1.2rem 0 1rem}.error{border-left:3px solid var(--alert);background:var(--alert-bg);color:var(--ink);border-radius:0 8px 8px 0;margin:0 0 1rem;padding:.8rem 1rem;font-size:.92rem}label{color:var(--ink);margin-bottom:.4rem;font-size:.88rem;font-weight:600;display:block}input[type=password]{border:1px solid var(--line);background:var(--paper);width:100%;color:var(--ink);border-radius:8px;padding:.65rem .8rem;font-family:inherit;font-size:1rem}input[type=password]:focus-visible,.btn:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.hint{font-size:.85rem}