:root{--signin-bg: white;--signin-text: #333;--signin-text-muted: #555;--signin-text-subtle: #666;--signin-btn-bg: #007bff;--signin-btn-hover: #0056b3;--signin-btn-disabled: #ccc;--signin-surface: #f8f9fa}.signin-container{max-width:500px;margin:60px auto;padding:24px}.signin-card{background:var(--signin-bg);border-radius:12px;padding:32px;box-shadow:0 2px 8px #0000001a}.signin-card h1{margin:0 0 12px;font-size:24px;color:var(--signin-text)}.signin-card p{margin:0 0 24px;color:var(--signin-text-muted);line-height:1.6}.btn-primary{width:100%;padding:12px;background:var(--signin-btn-bg);color:#fff;border:none;border-radius:6px;font-size:16px;font-weight:500;cursor:pointer;transition:background .2s}.btn-primary:hover{background:var(--signin-btn-hover)}.btn-primary:disabled{background:var(--signin-btn-disabled);cursor:not-allowed}.status-message{margin-top:16px;padding:12px;border-radius:6px;font-size:14px}.status-message.success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.status-message.error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.status-message.info{background:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}.help-text{margin-top:16px;padding:12px;background:var(--signin-surface);border-left:3px solid var(--signin-btn-bg);border-radius:4px;font-size:13px;color:var(--signin-text-subtle)}.help-text strong{color:var(--signin-text)}.alternative{margin-top:24px;padding-top:24px;border-top:1px solid #eee;text-align:center}.google-btn{display:inline-flex;justify-content:center;align-items:center;gap:10px;font-weight:600;font-size:15px}.google-btn:before{content:"";width:20px;height:20px;background:url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48"%3E%3Cpath fill="%234285F4" d="M24 9.5c3.54 0 6 1.54 7.38 2.84l5.36-5.36C33.64 3.64 29.18 1.5 24 1.5 14.62 1.5 6.74 7.54 3.22 16.02l6.88 5.35C11.8 13.97 17.4 9.5 24 9.5z"/%3E%3Cpath fill="%2334A853" d="M46.5 24.5c0-1.64-.15-3.22-.42-4.75H24v9.01h12.7c-.55 2.97-2.21 5.49-4.72 7.18l7.36 5.72C43.93 37.7 46.5 31.62 46.5 24.5z"/%3E%3Cpath fill="%23FBBC05" d="M10.1 28.67c-.45-1.31-.7-2.71-.7-4.17s.25-2.86.7-4.17l-6.88-5.35C1.82 18.27 1 21.07 1 24c0 2.93.82 5.73 2.22 8.02l6.88-5.35z"/%3E%3Cpath fill="%23EA4335" d="M24 46.5c5.18 0 9.64-1.71 12.86-4.66l-7.36-5.72c-2.04 1.37-4.66 2.17-7.5 2.17-6.6 0-12.2-4.47-14.02-10.67l-6.88 5.35C6.74 40.46 14.62 46.5 24 46.5z"/%3E%3Cpath fill="none" d="M1 1h46v46H1z"/%3E%3C/svg%3E') no-repeat center/contain}