:root{color-scheme:light dark;--bg:#0f1218;--surface:#171b24;--border:#2a3140;--text:#e8eaef;--muted:#9aa3b5;--accent:#3b82f6;--accent-hover:#2563eb;--danger:#f87171;--radius:12px;--font:system-ui,-apple-system,"Segoe UI",Roboto,"Hiragino Sans","Noto Sans JP",sans-serif}@media (prefers-color-scheme:light){:root{--bg:#f4f5f8;--surface:#ffffff;--border:#e2e5ec;--text:#111827;--muted:#5b6475}}*{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text)}.app-shell,body{min-height:100vh}.app-shell{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;gap:16px}.login-card{width:100%;max-width:420px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px 28px 24px;box-shadow:0 18px 50px rgba(0,0,0,.25)}.login-card h1{margin:0 0 6px;font-size:1.35rem;font-weight:650;letter-spacing:-.02em}.login-card .subtitle{margin:0 0 22px;font-size:.9rem;color:var(--muted);line-height:1.5}.login-card .subtitle.tenant-line{margin-bottom:8px;color:var(--text)}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field label{font-size:.8rem;font-weight:600;color:var(--muted)}.field input{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text);font-size:1rem}.field input:focus{outline:2px solid var(--accent);outline-offset:1px}.actions{display:flex;flex-direction:column;gap:10px;margin-top:8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 14px;border-radius:8px;border:1px solid transparent;font-size:.95rem;font-weight:600;cursor:pointer;font-family:inherit}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-secondary{background:transparent;color:var(--text);border-color:var(--border)}.btn-secondary:hover:not(:disabled){border-color:var(--muted)}.divider{display:flex;align-items:center;gap:12px;margin:18px 0 14px;color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em}.divider:after,.divider:before{content:"";flex:1;height:1px;background:var(--border)}.banner{margin-top:16px;padding:10px 12px;border-radius:8px;font-size:.85rem;line-height:1.45}.banner-error{background:rgba(248,113,113,.12);border:1px solid rgba(248,113,113,.35);color:var(--danger)}.banner-info{background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.35);color:var(--text)}.banner-success{background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.35)}.muted-small{margin-top:14px;font-size:.78rem;color:var(--muted);line-height:1.5}.welcome-card{width:100%;max-width:420px;margin-bottom:8px;padding:16px 18px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface)}.welcome-card-success{border-color:rgba(34,197,94,.45);background:rgba(34,197,94,.08)}.welcome-card-forbidden{max-width:480px;border-color:rgba(248,113,113,.55);background:rgba(248,113,113,.1)}.welcome-line.forbidden-title{font-weight:700;font-size:1.1rem;margin-bottom:8px;color:var(--text)}.welcome-line.small{font-size:.85rem;margin-top:8px}.welcome-line{margin:0;font-size:1.05rem;line-height:1.55}.welcome-line.muted{font-size:.92rem;color:var(--muted)}.welcome-line.error{color:var(--danger);font-size:.95rem}.welcome-line .email{word-break:break-all}