:root{--ground:#e7e5dd;--surface:#f2f0e8;--surface-2:#f7f5ee;--ink:#23251f;--ink-sub:#5f6156;--ink-faint:#8a8b7f;--line:#d4d1c5;--accent:#bf5228;--accent-ink:#9e4019;--accent-weak:#eee2d6;--err:#b23a20;--mono:ui-monospace,"SF Mono","Cascadia Code",Consolas,"Liberation Mono",monospace;--sans:-apple-system,"Segoe UI","Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif}@media (prefers-color-scheme:dark){:root{--ground:#181913;--surface:#20211a;--surface-2:#25261e;--ink:#e9e7dc;--ink-sub:#a4a496;--ink-faint:#77776b;--line:#33342b;--accent-weak:#33241a}}:root[data-theme=light]{--ground:#e7e5dd;--surface:#f2f0e8;--surface-2:#f7f5ee;--ink:#23251f;--ink-sub:#5f6156;--ink-faint:#8a8b7f;--line:#d4d1c5;--accent-weak:#eee2d6}:root[data-theme=dark]{--ground:#181913;--surface:#20211a;--surface-2:#25261e;--ink:#e9e7dc;--ink-sub:#a4a496;--ink-faint:#77776b;--line:#33342b;--accent-weak:#33241a}body{background:var(--ground);margin:0;padding:0}.auth *{box-sizing:border-box}.auth{min-height:100dvh;font-family:var(--sans);color:var(--ink);background:var(--ground);flex-direction:column;justify-content:center;align-items:center;padding:32px 20px;line-height:1.7;display:flex}.auth .card{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;width:100%;max-width:400px;padding:30px 28px}.auth .eyebrow{font-family:var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);text-align:center;font-size:10.5px}.auth .brand{color:var(--ink);justify-content:center;align-items:center;gap:9px;margin:10px 0 2px;font-size:20px;font-weight:700;display:flex}.auth .brand svg{align-self:center}.auth .brand .core{font-family:var(--mono);letter-spacing:.22em;color:var(--ink-sub);font-size:15px;font-weight:600}.auth .tag{text-align:center;color:var(--ink-sub);margin:6px 0 22px;font-size:12.5px}.auth .tabs{gap:8px;margin-bottom:18px;display:flex}.auth .tab{border:1px solid var(--line);min-height:44px;font-family:var(--sans);cursor:pointer;color:var(--ink-sub);background:0 0;border-radius:7px;flex:1;padding:9px 10px;font-size:14px;font-weight:600;transition:all .14s}.auth .tab:hover{border-color:var(--ink-faint)}.auth .tab.on{background:var(--accent);color:#fbf7f0;border-color:var(--accent)}.auth label{margin-bottom:13px;display:block}.auth .lab{font-family:var(--mono);letter-spacing:.03em;color:var(--ink-sub);margin-bottom:5px;font-size:11px;display:block}.auth input{border:1px solid var(--line);background:var(--surface);width:100%;color:var(--ink);font-size:16px;font-family:var(--sans);border-radius:7px;padding:11px 12px;transition:border-color .14s,box-shadow .14s}.auth input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-weak);outline:none}.auth .err{color:var(--err);margin-bottom:12px;font-size:13px}.auth .submit{background:var(--accent);color:#fbf7f0;width:100%;font-family:var(--sans);cursor:pointer;border:0;border-radius:7px;margin-top:2px;padding:11px;font-size:15px;font-weight:600;transition:background .14s}.auth .submit:hover{background:var(--accent-ink)}.auth .submit:disabled{opacity:.6;cursor:default}.auth .consent{color:var(--ink-sub);margin:12px 0 0;font-size:12px;line-height:1.7}.auth .consent a{color:var(--accent-ink);text-decoration:underline}.auth .back{font-family:var(--mono);color:var(--ink-faint);margin-top:18px;font-size:12px}.auth .back a{color:var(--ink-sub);padding:10px 6px;text-decoration:none;display:inline-block}.auth .consent a{padding:4px 0;display:inline-block}.auth .back a:hover{color:var(--accent)}