:root{--bg-color:#f7f7f8;--card-bg:#ffffff;--text-main:#111827;--text-muted:#6b7280;--border-color:#e5e7eb;--primary:#000000;--primary-hover:#374151;--error:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main);height:100vh;display:flex;justify-content:center;align-items:center;-webkit-font-smoothing:antialiased}.login-box{background:var(--card-bg);width:100%;max-width:400px;padding:3rem 2.5rem;border-radius:12px;box-shadow:0 4px 6px-1px rgba(0,0,0,0.05),0 2px 4px-1px rgba(0,0,0,0.03)}.header{text-align:center;margin-bottom:2.5rem}.header h2{font-size:1.5rem;font-weight:600;letter-spacing:-0.5px;margin-bottom:0.5rem}.header p{color:var(--text-muted);font-size:0.875rem}.input-group{position:relative;margin-bottom:1.5rem}.input-group input{width:100%;padding:0.75rem 0;border:none;border-bottom:1px solid var(--border-color);font-size:1rem;color:var(--text-main);background:transparent;transition:border-color 0.3s ease;outline:none}.input-group input:focus{border-bottom-color:var(--primary)}.input-group input::placeholder{color:#9ca3af}.toggle-pwd{position:absolute;right:0;top:50%;transform:translateY(-50%);color:var(--text-muted);cursor:pointer;font-size:0.875rem}.input-group.error input{border-bottom-color:var(--error)}.error-msg{color:var(--error);font-size:0.75rem;margin-top:0.5rem;display:none}.input-group.error.error-msg{display:block}.login-btn{width:100%;padding:0.875rem;margin-top:1rem;background-color:var(--primary);color:#fff;border:none;border-radius:6px;font-size:0.95rem;font-weight:500;letter-spacing:0.5px;cursor:pointer;transition:background-color 0.2s ease;display:flex;justify-content:center;align-items:center;height:48px}.login-btn:hover:not(:disabled){background-color:var(--primary-hover)}.login-btn:disabled{opacity:0.7;cursor:not-allowed}.loader{width:16px;height:16px;border:2px solid rgba(255,255,255,0.3);border-top-color:#fff;border-radius:50%;animation:spin 0.8s linear infinite;display:none}.login-btn.loading.loader{display:block}.login-btn.loading.btn-text{display:none}@keyframes spin{to{transform:rotate(360deg)}}.modal-overlay{position:fixed;inset:0;background:rgba(255,255,255,0.8);backdrop-filter:blur(5px);display:flex;justify-content:center;align-items:center;opacity:0;visibility:hidden;transition:all 0.3s ease;z-index:50}.modal-overlay.active{opacity:1;visibility:visible}.modal-content{background:#fff;padding:2.5rem;border-radius:12px;width:90%;max-width:320px;text-align:center;box-shadow:0 20px 25px-5px rgba(0,0,0,0.1);border:1px solid var(--border-color);transform:translateY(20px);transition:transform 0.3s ease}.modal-overlay.active.modal-content{transform:translateY(0)}.modal-icon{font-size:2rem;color:var(--text-main);margin-bottom:1rem}.modal-content h3{font-size:1.1rem;margin-bottom:0.5rem}.modal-content p{color:var(--text-muted);font-size:0.875rem;margin-bottom:1.5rem;line-height:1.5}.modal-close-btn{padding:0.6rem 1.5rem;background:transparent;border:1px solid var(--border-color);border-radius:6px;cursor:pointer;transition:all 0.2s;font-size:0.875rem}.modal-close-btn:hover{background:var(--bg-color)}