:root{font-family:Hiragino Sans,Noto Sans JP,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.6;color:#1a1d21;background-color:#f6f7f9}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh}.auth-container{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:1rem}.auth-card{background:#fff;border-radius:12px;box-shadow:0 4px 24px #00000014;padding:2.5rem 2rem;width:100%;max-width:400px}.auth-card h1{font-size:1.4rem;margin-bottom:.5rem;text-align:center}.auth-card p.subtitle{color:#6b7280;font-size:.9rem;text-align:center;margin-bottom:1.5rem}.form-group{margin-bottom:1rem}.form-group label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.35rem}.form-group input{width:100%;padding:.65rem .8rem;border:1px solid #d1d5db;border-radius:8px;font-size:1rem;transition:border-color .15s}.form-group input:focus{outline:none;border-color:#4f46e5}.btn-primary{width:100%;padding:.7rem;background:#4f46e5;color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .15s}.btn-primary:hover{background:#4338ca}.btn-primary:disabled{background:#a5b4fc;cursor:not-allowed}.toggle-mode{text-align:center;margin-top:1.25rem;font-size:.9rem;color:#6b7280}.toggle-mode button{background:none;border:none;color:#4f46e5;cursor:pointer;font-size:.9rem;text-decoration:underline}.message{padding:.7rem .9rem;border-radius:8px;font-size:.88rem;margin-bottom:1rem}.message.error{background:#fef2f2;color:#b91c1c}.message.info{background:#eff6ff;color:#1d4ed8}.dashboard{max-width:960px;margin:0 auto;padding:2rem 1.5rem}.dashboard-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.dashboard-header h1{font-size:1.3rem}.btn-secondary{padding:.5rem 1rem;background:#fff;color:#374151;border:1px solid #d1d5db;border-radius:8px;font-size:.9rem;cursor:pointer}.btn-secondary:hover{background:#f3f4f6}.card{background:#fff;border-radius:12px;box-shadow:0 2px 12px #0000000f;padding:1.5rem}