:root {
            --primary-blue: #1F8CCB;
            --secondary-blue: #1a7bb8;
            --white: #ffffff;
            --light-gray: #f8fafc;
            --medium-gray: #e2e8f0;
            --text-gray: #64748b;
            --text-dark: #0f172a;
            --success: #10b981;
            --error: #ef4444;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: #fafafa;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px 0;
        }

        .login-container {
            width: 100%;
            max-width: 400px;
            margin: 0 auto;
            padding: 20px;
        }

        .login-card {
            background: var(--white);
            border-radius: 16px;
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid #e5e7eb;
        }

        .login-header {
            background: var(--white);
            padding: 40px 32px 24px;
            text-align: center;
            position: relative;
            border-bottom: 1px solid #f3f4f6;
        }

        .logo-container {
            margin-bottom: 20px;
        }

        .logo-container img {
            max-width: 200px;
            height: auto;
        }

        .login-title {
            color: var(--text-dark);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .login-subtitle {
            color: var(--text-gray);
            font-size: 0.9rem;
            font-weight: 500;
        }

        .login-body {
            padding: 32px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.875rem;
        }

        .form-label i {
            color: var(--primary-blue);
            width: 14px;
        }

        .form-control {
            border: 2px solid var(--medium-gray);
            border-radius: 8px;
            padding: 12px 14px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: border-color 0.2s ease;
            background: var(--light-gray);
        }

        .form-control:focus {
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            outline: none;
            background: var(--white);
        }

        .form-control::placeholder {
            color: var(--text-gray);
            font-weight: 400;
        }

        .form-control.is-invalid {
            border-color: var(--error);
            background: rgba(239, 68, 68, 0.05);
        }

        .btn-login {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
            border: none;
            border-radius: 8px;
            padding: 12px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--white);
            width: 100%;
            cursor: pointer;
            transition: transform 0.2s ease;
        }

        .btn-login:hover {
            transform: translateY(-1px);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .alert {
            border: none;
            border-radius: 8px;
            padding: 12px;
            margin-bottom: 20px;
            font-weight: 500;
            font-size: 0.875rem;
        }

        .alert-danger {
            background: rgba(239, 68, 68, 0.1);
            color: var(--error);
            border-left: 3px solid var(--error);
        }

        .alert-success {
            background: rgba(16, 185, 129, 0.1);
            color: var(--success);
            border-left: 3px solid var(--success);
        }

        /* Password toggle button */
        .password-input-container {
            position: relative;
        }

        .password-toggle-btn {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-gray);
            cursor: pointer;
            padding: 4px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            transition: all 0.2s ease;
        }

        .password-toggle-btn:hover {
            color: var(--primary-blue);
            background: rgba(31, 140, 203, 0.1);
        }

        .password-toggle-btn:focus {
            outline: 2px solid var(--primary-blue);
            outline-offset: 2px;
        }

        .password-input-container .form-control {
            padding-right: 48px;
        }

        /* Mobile block styles */
        .mobile-block {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            color: white;
            text-align: center;
            padding: 20px;
        }

        .mobile-block-content {
            max-width: 400px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .mobile-block-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            opacity: 0.9;
        }

        .mobile-block-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .mobile-block-text {
            font-size: 1rem;
            line-height: 1.6;
            opacity: 0.9;
            margin-bottom: 20px;
        }

        .mobile-block-desktop {
            font-size: 0.875rem;
            opacity: 0.8;
            font-style: italic;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .login-container {
                padding: 15px;
                max-width: 350px;
            }
            
            .login-header {
                padding: 24px 24px 20px;
            }
            
            .login-body {
                padding: 24px;
            }
            
            .login-title {
                font-size: 1.25rem;
            }
            
            .logo-container img {
                max-width: 160px;
            }
        }