:root{--bg:#f4f5f7;--surface:#fff;--surface2:#f8f9fb;--navy:#1a2e4a;--navy2:#243d5c;--accent:#2563eb;--border:#dde1e8;--border2:#c8cdd7;--text:#1a1f2e;--text2:#4b5568;--text3:#6b7a90;--green:#16a34a;--green-bg:#f0fdf4;--green-border:#bbf7d0;--red:#dc2626;--red-bg:#fef2f2;--red-border:#fecaca;--accent-weak:#eef2ff;--accent-line:#c7d7f5;--accent-ink:#1d4ed8;--radius-sm:6px;--shadow-lg:0 12px 32px #00000047, 0 2px 6px #0000001f;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}:root:not([data-theme=light]){--bg:#0f141d;--surface:#172033;--surface2:#1e2940;--navy:#0f1d30;--navy2:#17263d;--border:#2c3852;--border2:#3b4a68;--text:#e8ecf3;--text2:#a3b0c6;--text3:#8496b0;--accent:#60a5fa;--accent-weak:#1b2942;--accent-line:#2f4570;--accent-ink:#93c5fd;--green:#4ade80;--green-bg:#12261a;--green-border:#1f4d33;--red:#f87171;--red-bg:#2a1618;--red-border:#5c2626}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{color:var(--text);font-family:Noto Sans JP,system-ui,-apple-system,Hiragino Sans,Yu Gothic UI,sans-serif;font-size:14px;line-height:1.6}.auth-page{min-height:100dvh;padding:24px 16px calc(24px + env(safe-area-inset-bottom));background:radial-gradient(1100px 620px at 50% -12%,#2563eb38,#0000 62%),linear-gradient(160deg,#1a2e4a 0%,#243d5c 55%,#0f1d30 100%);place-items:center;display:grid}.auth-card{background:var(--surface);border:1px solid var(--border);width:min(430px,100%);box-shadow:var(--shadow-lg);border-radius:14px;padding:32px 28px 26px}.auth-mark{background:var(--navy);color:#fff;border-radius:10px;place-items:center;width:44px;height:44px;margin-bottom:16px;font-size:21px;display:grid}.auth-title{letter-spacing:.02em;font-size:17px;font-weight:700}.auth-sub{color:var(--text2);margin:6px 0 22px;font-size:12px;line-height:1.7}.auth-fld{flex-direction:column;gap:5px;margin-bottom:14px;display:flex}.auth-fld label{color:var(--text2);font-size:11px;font-weight:500}.auth-fld input{color:var(--text);background:var(--surface2);border:1px solid var(--border2);border-radius:var(--radius-sm);outline:none;width:100%;padding:11px 12px;font-family:inherit;font-size:16px;transition:border-color .15s,box-shadow .15s}.auth-fld input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2563eb2e}.auth-fld input[aria-invalid=true]{border-color:var(--red)}.auth-btn{background:var(--navy);color:#fff;cursor:pointer;border:0;border-radius:8px;justify-content:center;align-items:center;gap:8px;width:100%;min-height:44px;margin-top:6px;font-family:inherit;font-size:14px;font-weight:700;transition:background .15s,transform .1s;display:flex}.auth-btn:hover:not(:disabled){background:var(--navy2);transform:translateY(-1px)}.auth-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.auth-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.auth-err{background:var(--red-bg);border:1px solid var(--red-border);color:var(--red);border-radius:8px;margin-bottom:14px;padding:10px 13px;font-size:12px;line-height:1.6}.auth-note{background:var(--accent-weak);border:1px solid var(--accent-line);color:var(--accent-ink);border-radius:8px;margin-bottom:18px;padding:10px 13px;font-size:12px;line-height:1.7}.auth-foot{border-top:1px solid var(--border);color:var(--text3);text-align:center;margin-top:18px;padding-top:14px;font-size:11px;line-height:1.8}.pw-req{color:var(--text2);margin:9px 0 0;font-size:11px;line-height:1.9;list-style:none}.pw-req li:before{content:"・";color:var(--text3)}@media (prefers-reduced-motion:reduce){*{transition:none!important}}